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incubator-nuttx/drivers/usbdev/usbmsc.c

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/****************************************************************************
* drivers/usbdev/usbmsc.c
*
* Copyright (C) 2008-2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Mass storage class device. Bulk-only with SCSI subclass.
*
* References:
* "Universal Serial Bus Mass Storage Class, Specification Overview,"
* Revision 1.2, USB Implementer's Forum, June 23, 2003.
*
* "Universal Serial Bus Mass Storage Class, Bulk-Only Transport,"
* Revision 1.0, USB Implementer's Forum, September 31, 1999.
*
* "SCSI Primary Commands - 3 (SPC-3)," American National Standard
* for Information Technology, May 4, 2005
*
* "SCSI Primary Commands - 4 (SPC-4)," American National Standard
* for Information Technology, July 19, 2008
*
* "SCSI Block Commands -2 (SBC-2)," American National Standard
* for Information Technology, November 13, 2004
*
* "SCSI Multimedia Commands - 3 (MMC-3)," American National Standard
* for Information Technology, November 12, 2001
*
* 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 <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <queue.h>
#include <debug.h>
#include <nuttx/kmalloc.h>
#include <nuttx/kthread.h>
#include <nuttx/arch.h>
#include <nuttx/fs/fs.h>
#include <nuttx/usb/usb.h>
#include <nuttx/usb/storage.h>
#include <nuttx/usb/usbdev.h>
#include <nuttx/usb/usbdev_trace.h>
#include "usbmsc.h"
#ifdef CONFIG_USBMSC_COMPOSITE
# include <nuttx/usb/composite.h>
# include "composite.h"
#endif
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/* The internal version of the class driver */
struct usbmsc_driver_s
{
struct usbdevclass_driver_s drvr;
FAR struct usbmsc_dev_s *dev;
};
/* This is what is allocated */
struct usbmsc_alloc_s
{
struct usbmsc_dev_s dev;
struct usbmsc_driver_s drvr;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Class Driver Support *****************************************************/
static void usbmsc_ep0incomplete(FAR struct usbdev_ep_s *ep,
FAR struct usbdev_req_s *req);
static struct usbdev_req_s *usbmsc_allocreq(FAR struct usbdev_ep_s *ep,
uint16_t len);
static void usbmsc_freereq(FAR struct usbdev_ep_s *ep,
FAR struct usbdev_req_s *req);
/* Class Driver Operations (most at interrupt level) ************************/
static int usbmsc_bind(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev);
static void usbmsc_unbind(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev);
static int usbmsc_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 usbmsc_disconnect(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev);
/* Initialization/Uninitialization ******************************************/
static void usbmsc_lununinitialize(struct usbmsc_lun_s *lun);
#ifdef CONFIG_USBMSC_COMPOSITE
static int usbmsc_exportluns(FAR void *handle);
#endif
/****************************************************************************
* Private Data
****************************************************************************/
/* Driver operations ********************************************************/
static struct usbdevclass_driverops_s g_driverops =
{
usbmsc_bind, /* bind */
usbmsc_unbind, /* unbind */
usbmsc_setup, /* setup */
usbmsc_disconnect, /* disconnect */
NULL, /* suspend */
NULL /* resume */
};
/* Used to hand-off the state structure when the SCSI worker thread is started */
FAR struct usbmsc_dev_s *g_usbmsc_handoff;
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Class Driver Support
****************************************************************************/
/****************************************************************************
* Name: usbmsc_ep0incomplete
*
* Description:
* Handle completion of EP0 control operations
*
****************************************************************************/
static void usbmsc_ep0incomplete(FAR struct usbdev_ep_s *ep,
FAR struct usbdev_req_s *req)
{
if (req->result || req->xfrd != req->len)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_REQRESULT),
(uint16_t)-req->result);
}
}
/****************************************************************************
* Name: usbmsc_allocreq
*
* Description:
* Allocate a request instance along with its buffer
*
****************************************************************************/
static struct usbdev_req_s *usbmsc_allocreq(FAR struct usbdev_ep_s *ep,
uint16_t len)
{
FAR struct usbdev_req_s *req;
req = EP_ALLOCREQ(ep);
if (req != NULL)
{
req->len = len;
req->buf = EP_ALLOCBUFFER(ep, len);
if (!req->buf)
{
EP_FREEREQ(ep, req);
req = NULL;
}
}
return req;
}
/****************************************************************************
* Name: usbmsc_freereq
*
* Description:
* Free a request instance along with its buffer
*
****************************************************************************/
static void usbmsc_freereq(FAR struct usbdev_ep_s *ep, struct usbdev_req_s *req)
{
if (ep != NULL && req != NULL)
{
if (req->buf != NULL)
{
EP_FREEBUFFER(ep, req->buf);
}
EP_FREEREQ(ep, req);
}
}
/****************************************************************************
* Class Driver Interfaces
****************************************************************************/
/****************************************************************************
* Name: usbmsc_bind
*
* Description:
* Invoked when the driver is bound to a USB device driver
*
****************************************************************************/
static int usbmsc_bind(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev)
{
FAR struct usbmsc_dev_s *priv = ((FAR struct usbmsc_driver_s*)driver)->dev;
FAR struct usbmsc_req_s *reqcontainer;
irqstate_t flags;
int ret = OK;
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 (Unless we are part of
* a composite device and, in that case, the composite device owns
* EP0).
*/
#ifndef CONFIG_USBMSC_COMPOSITE
dev->ep0->priv = priv;
#endif
/* The configured EP0 size should match the reported EP0 size. We could
* easily adapt to the reported EP0 size, but then we could not use the
* const, canned descriptors.
*/
DEBUGASSERT(CONFIG_USBMSC_EP0MAXPACKET == dev->ep0->maxpacket);
/* Preallocate control request */
priv->ctrlreq = usbmsc_allocreq(dev->ep0, USBMSC_MXDESCLEN);
if (priv->ctrlreq == NULL)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_ALLOCCTRLREQ), 0);
ret = -ENOMEM;
goto errout;
}
priv->ctrlreq->callback = usbmsc_ep0incomplete;
/* Pre-allocate all endpoints... the endpoints will not be functional
* until the SET CONFIGURATION request is processed in usbmsc_setconfig.
* This is done here because there may be calls to kmm_malloc and the SET
* CONFIGURATION processing probably occurrs within interrupt handling
* logic where kmm_malloc calls will fail.
*/
/* Pre-allocate the IN bulk endpoint */
priv->epbulkin = DEV_ALLOCEP(dev, USBMSC_EPINBULK_ADDR, true, USB_EP_ATTR_XFER_BULK);
if (!priv->epbulkin)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_EPBULKINALLOCFAIL), 0);
ret = -ENODEV;
goto errout;
}
priv->epbulkin->priv = priv;
/* Pre-allocate the OUT bulk endpoint */
priv->epbulkout = DEV_ALLOCEP(dev, USBMSC_EPOUTBULK_ADDR, false, USB_EP_ATTR_XFER_BULK);
if (!priv->epbulkout)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_EPBULKOUTALLOCFAIL), 0);
ret = -ENODEV;
goto errout;
}
priv->epbulkout->priv = priv;
/* Pre-allocate read requests */
for (i = 0; i < CONFIG_USBMSC_NRDREQS; i++)
{
reqcontainer = &priv->rdreqs[i];
reqcontainer->req = usbmsc_allocreq(priv->epbulkout, CONFIG_USBMSC_BULKOUTREQLEN);
if (reqcontainer->req == NULL)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_RDALLOCREQ),
(uint16_t)-ret);
ret = -ENOMEM;
goto errout;
}
reqcontainer->req->priv = reqcontainer;
reqcontainer->req->callback = usbmsc_rdcomplete;
}
/* Pre-allocate write request containers and put in a free list */
for (i = 0; i < CONFIG_USBMSC_NWRREQS; i++)
{
reqcontainer = &priv->wrreqs[i];
reqcontainer->req = usbmsc_allocreq(priv->epbulkin, CONFIG_USBMSC_BULKINREQLEN);
if (reqcontainer->req == NULL)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_WRALLOCREQ),
(uint16_t)-ret);
ret = -ENOMEM;
goto errout;
}
reqcontainer->req->priv = reqcontainer;
reqcontainer->req->callback = usbmsc_wrcomplete;
flags = irqsave();
sq_addlast((sq_entry_t*)reqcontainer, &priv->wrreqlist);
irqrestore(flags);
}
/* Report if we are selfpowered (unless we are part of a composite device) */
#ifndef CONFIG_USBMSC_COMPOSITE
#ifdef CONFIG_USBDEV_SELFPOWERED
DEV_SETSELFPOWERED(dev);
#endif
/* And pull-up the data line for the soft connect function (unless we are
* part of a composite device)
*/
DEV_CONNECT(dev);
#endif
return OK;
errout:
usbmsc_unbind(driver, dev);
return ret;
}
/****************************************************************************
* Name: usbmsc_unbind
*
* Description:
* Invoked when the driver is unbound from a USB device driver
*
****************************************************************************/
static void usbmsc_unbind(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev)
{
FAR struct usbmsc_dev_s *priv;
FAR struct usbmsc_req_s *reqcontainer;
irqstate_t flags;
int i;
usbtrace(TRACE_CLASSUNBIND, 0);
#ifdef CONFIG_DEBUG
if (!driver || !dev || !dev->ep0)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_UNBINDINVALIDARGS), 0);
return;
}
#endif
/* Extract reference to private data */
priv = ((FAR struct usbmsc_driver_s*)driver)->dev;
#ifdef CONFIG_DEBUG
if (!priv)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_EP0NOTBOUND1), 0);
return;
}
#endif
/* The worker thread should have already been stopped by the
* driver un-initialize logic.
*/
DEBUGASSERT(priv->thstate == USBMSC_STATE_TERMINATED || priv->thstate == USBMSC_STATE_NOTSTARTED);
/* Make sure that we are not already unbound */
if (priv != NULL)
{
/* Make sure that the endpoints have been unconfigured. If
* we were terminated gracefully, then the configuration should
* already have been reset. If not, then calling usbmsc_resetconfig
* should cause the endpoints to immediately terminate all
* transfers and return the requests to us (with result == -ESHUTDOWN)
*/
usbmsc_resetconfig(priv);
up_mdelay(50);
/* Free the pre-allocated control request */
if (priv->ctrlreq != NULL)
{
usbmsc_freereq(dev->ep0, priv->ctrlreq);
priv->ctrlreq = NULL;
}
/* Free pre-allocated read requests (which should all have
* been returned to the free list at this time -- we don't check)
*/
for (i = 0; i < CONFIG_USBMSC_NRDREQS; i++)
{
reqcontainer = &priv->rdreqs[i];
if (reqcontainer->req)
{
usbmsc_freereq(priv->epbulkout, reqcontainer->req);
reqcontainer->req = NULL;
}
}
/* Free the bulk OUT endpoint */
if (priv->epbulkout)
{
DEV_FREEEP(dev, priv->epbulkout);
priv->epbulkout = NULL;
}
/* Free write requests that are not in use (which should be all
* of them
*/
flags = irqsave();
while (!sq_empty(&priv->wrreqlist))
{
reqcontainer = (struct usbmsc_req_s *)sq_remfirst(&priv->wrreqlist);
if (reqcontainer->req != NULL)
{
usbmsc_freereq(priv->epbulkin, reqcontainer->req);
}
}
/* Free the bulk IN endpoint */
if (priv->epbulkin)
{
DEV_FREEEP(dev, priv->epbulkin);
priv->epbulkin = NULL;
}
irqrestore(flags);
}
}
/****************************************************************************
* Name: usbmsc_setup
*
* Description:
* Invoked for ep0 control requests. This function probably executes
* in the context of an interrupt handler.
*
****************************************************************************/
static int usbmsc_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 usbmsc_dev_s *priv;
FAR struct usbdev_req_s *ctrlreq;
uint16_t value;
uint16_t index;
uint16_t len;
int ret = -EOPNOTSUPP;
#ifdef CONFIG_DEBUG
if (!driver || !dev || !dev->ep0 || !ctrl)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_SETUPINVALIDARGS), 0);
return -EIO;
}
#endif
/* Extract reference to private data */
usbtrace(TRACE_CLASSSETUP, ctrl->req);
priv = ((FAR struct usbmsc_driver_s *)driver)->dev;
#ifdef CONFIG_DEBUG
if (!priv || !priv->ctrlreq)
{
usbtrace(TRACE_CLSERROR(USBMSC_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);
uvdbg("type=%02x req=%02x value=%04x index=%04x len=%04x\n",
ctrl->type, ctrl->req, value, index, len);
if ((ctrl->type & USB_REQ_TYPE_MASK) == USB_REQ_TYPE_STANDARD)
{
/**********************************************************************
* 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])
{
/* If the mass storage device is used in as part of a composite
* device, then the device descriptor is is provided by logic
* in the composite device implementation.
*/
#ifndef CONFIG_USBMSC_COMPOSITE
case USB_DESC_TYPE_DEVICE:
{
ret = USB_SIZEOF_DEVDESC;
memcpy(ctrlreq->buf, usbmsc_getdevdesc(), ret);
}
break;
#endif
/* If the mass storage device is used in as part of a composite device,
* then the device qualifier descriptor is provided by logic in the
* composite device implementation.
*/
#if !defined(CONFIG_USBMSC_COMPOSITE) && defined(CONFIG_USBDEV_DUALSPEED)
case USB_DESC_TYPE_DEVICEQUALIFIER:
{
ret = USB_SIZEOF_QUALDESC;
memcpy(ctrlreq->buf, usbmsc_getqualdesc(), ret);
}
break;
case USB_DESC_TYPE_OTHERSPEEDCONFIG:
#endif
/* If the mass storage device is used in as part of a composite device,
* then the configuration descriptor is provided by logic in the
* composite device implementation.
*/
#ifndef CONFIG_USBMSC_COMPOSITE
case USB_DESC_TYPE_CONFIG:
{
#ifdef CONFIG_USBDEV_DUALSPEED
ret = usbmsc_mkcfgdesc(ctrlreq->buf, dev->speed, ctrl->value[1]);
#else
ret = usbmsc_mkcfgdesc(ctrlreq->buf);
#endif
}
break;
#endif
/* If the mass storage device is used in as part of a composite device,
* then the language string descriptor is provided by logic in the
* composite device implementation.
*/
#ifndef CONFIG_USBMSC_COMPOSITE
case USB_DESC_TYPE_STRING:
{
/* index == language code. */
ret = usbmsc_mkstrdesc(ctrl->value[0], (struct usb_strdesc_s *)ctrlreq->buf);
}
break;
#endif
default:
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_GETUNKNOWNDESC), value);
}
break;
}
}
break;
case USB_REQ_SETCONFIGURATION:
{
if (ctrl->type == 0)
{
/* Signal the worker thread to instantiate the new configuration */
priv->theventset |= USBMSC_EVENT_CFGCHANGE;
priv->thvalue = value;
usbmsc_scsi_signal(priv);
/* Return here... the response will be provided later by the
* worker thread.
*/
return OK;
}
}
break;
/* If the mass storage device is used in as part of a composite device,
* then the overall composite class configuration is managed by logic
* in the composite device implementation.
*/
#ifndef CONFIG_USBMSC_COMPOSITE
case USB_REQ_GETCONFIGURATION:
{
if (ctrl->type == USB_DIR_IN)
{
ctrlreq->buf[0] = priv->config;
ret = 1;
}
}
break;
#endif
case USB_REQ_SETINTERFACE:
{
if (ctrl->type == USB_REQ_RECIPIENT_INTERFACE)
{
if (priv->config == USBMSC_CONFIGID &&
index == USBMSC_INTERFACEID &&
value == USBMSC_ALTINTERFACEID)
{
/* Signal to instantiate the interface change */
priv->theventset |= USBMSC_EVENT_IFCHANGE;
usbmsc_scsi_signal(priv);
/* Return here... the response will be provided later by the
* worker thread.
*/
return OK;
}
}
}
break;
case USB_REQ_GETINTERFACE:
{
if (ctrl->type == (USB_DIR_IN|USB_REQ_RECIPIENT_INTERFACE) &&
priv->config == USBMSC_CONFIGIDNONE)
{
if (index != USBMSC_INTERFACEID)
{
ret = -EDOM;
}
else
{
ctrlreq->buf[0] = USBMSC_ALTINTERFACEID;
ret = 1;
}
}
}
break;
default:
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_UNSUPPORTEDSTDREQ), ctrl->req);
break;
}
}
else if ((ctrl->type & USB_REQ_TYPE_MASK) == USB_REQ_TYPE_CLASS)
{
/**********************************************************************
* Bulk-Only Mass Storage Class Requests
**********************************************************************/
/* Verify that we are configured */
if (!priv->config)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_NOTCONFIGURED), 0);
return ret;
}
switch (ctrl->req)
{
case USBMSC_REQ_MSRESET: /* Reset mass storage device and interface */
{
if (ctrl->type == USBMSC_TYPE_SETUPOUT && value == 0 && len == 0)
{
/* Only one interface is supported */
if (index != USBMSC_INTERFACEID)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_MSRESETNDX), index);
ret = -EDOM;
}
else
{
/* Signal to stop the current operation and reinitialize state */
priv->theventset |= USBMSC_EVENT_RESET;
usbmsc_scsi_signal(priv);
/* Return here... the response will be provided later by the
* worker thread.
*/
return OK;
}
}
}
break;
case USBMSC_REQ_GETMAXLUN: /* Return number LUNs supported */
{
if (ctrl->type == USBMSC_TYPE_SETUPIN && value == 0 && len == 1)
{
/* Only one interface is supported */
if (index != USBMSC_INTERFACEID)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_GETMAXLUNNDX), index);
ret = -EDOM;
}
else
{
ctrlreq->buf[0] = priv->nluns - 1;
ret = 1;
}
}
}
break;
default:
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_BADREQUEST), ctrl->req);
break;
}
}
else
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_UNSUPPORTEDTYPE), ctrl->type);
}
/* Respond to the setup command if data was returned. On an error return
* value (ret < 0), the USB driver will stall EP0.
*/
if (ret >= 0)
{
/* Configure the response */
ctrlreq->len = MIN(len, ret);
ctrlreq->flags = USBDEV_REQFLAGS_NULLPKT;
/* Send the response -- either directly to the USB controller or
* indirectly in the case where this class is a member of a composite
* device.
*/
#ifndef CONFIG_USBMSC_COMPOSITE
ret = EP_SUBMIT(dev->ep0, ctrlreq);
#else
ret = composite_ep0submit(driver, dev, ctrlreq);
#endif
if (ret < 0)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_EPRESPQ), (uint16_t)-ret);
#if 0 /* Not necessary */
ctrlreq->result = OK;
usbmsc_ep0incomplete(dev->ep0, ctrlreq);
#endif
}
}
return ret;
}
/****************************************************************************
* Name: usbmsc_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 usbmsc_disconnect(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev)
{
struct usbmsc_dev_s *priv;
irqstate_t flags;
usbtrace(TRACE_CLASSDISCONNECT, 0);
#ifdef CONFIG_DEBUG
if (!driver || !dev || !dev->ep0)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_DISCONNECTINVALIDARGS), 0);
return;
}
#endif
/* Extract reference to private data */
priv = ((FAR struct usbmsc_driver_s *)driver)->dev;
#ifdef CONFIG_DEBUG
if (!priv)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_EP0NOTBOUND3), 0);
return;
}
#endif
/* Reset the configuration */
flags = irqsave();
usbmsc_resetconfig(priv);
/* Signal the worker thread */
priv->theventset |= USBMSC_EVENT_DISCONNECT;
usbmsc_scsi_signal(priv);
irqrestore(flags);
/* Perform the soft connect function so that we will we can be
* re-enumerated (unless we are part of a composite device)
*/
#ifndef CONFIG_USBMSC_COMPOSITE
DEV_CONNECT(dev);
#endif
}
/****************************************************************************
* Initialization/Un-Initialization
****************************************************************************/
/****************************************************************************
* Name: usbmsc_lununinitialize
****************************************************************************/
static void usbmsc_lununinitialize(struct usbmsc_lun_s *lun)
{
/* Has a block driver has been bound to the LUN? */
if (lun->inode)
{
/* Close the block driver */
(void)close_blockdriver(lun->inode);
}
memset(lun, 0, sizeof(struct usbmsc_lun_s *));
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Internal Interfaces
****************************************************************************/
/****************************************************************************
* Name: usbmsc_setconfig
*
* Description:
* Set the device configuration by allocating and configuring endpoints and
* by allocating and queuing read and write requests.
*
****************************************************************************/
int usbmsc_setconfig(FAR struct usbmsc_dev_s *priv, uint8_t config)
{
FAR struct usbmsc_req_s *privreq;
FAR struct usbdev_req_s *req;
#ifdef CONFIG_USBDEV_DUALSPEED
FAR const struct usb_epdesc_s *epdesc;
bool hispeed = (priv->usbdev->speed == USB_SPEED_HIGH);
#endif
int i;
int ret = 0;
#if CONFIG_DEBUG
if (priv == NULL)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_SETCONFIGINVALIDARGS), 0);
return -EIO;
}
#endif
if (config == priv->config)
{
/* Already configured -- Do nothing */
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_ALREADYCONFIGURED), 0);
return OK;
}
/* Discard the previous configuration data */
usbmsc_resetconfig(priv);
/* Was this a request to simply discard the current configuration? */
if (config == USBMSC_CONFIGIDNONE)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CONFIGNONE), 0);
return OK;
}
/* We only accept one configuration */
if (config != USBMSC_CONFIGID)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_CONFIGIDBAD), 0);
return -EINVAL;
}
/* Configure the IN bulk endpoint */
#ifdef CONFIG_USBDEV_DUALSPEED
epdesc = USBMSC_EPBULKINDESC(hispeed);
ret = EP_CONFIGURE(priv->epbulkin, epdesc, false);
#else
ret = EP_CONFIGURE(priv->epbulkin,
usbmsc_getepdesc(USBMSC_EPFSBULKIN), false);
#endif
if (ret < 0)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_EPBULKINCONFIGFAIL), 0);
goto errout;
}
priv->epbulkin->priv = priv;
/* Configure the OUT bulk endpoint */
#ifdef CONFIG_USBDEV_DUALSPEED
epdesc = USBMSC_EPBULKOUTDESC(hispeed);
ret = EP_CONFIGURE(priv->epbulkout, epdesc, true);
#else
ret = EP_CONFIGURE(priv->epbulkout,
usbmsc_getepdesc(USBMSC_EPFSBULKOUT), true);
#endif
if (ret < 0)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_EPBULKOUTCONFIGFAIL), 0);
goto errout;
}
priv->epbulkout->priv = priv;
/* Queue read requests in the bulk OUT endpoint */
for (i = 0; i < CONFIG_USBMSC_NRDREQS; i++)
{
privreq = &priv->rdreqs[i];
req = privreq->req;
req->len = CONFIG_USBMSC_BULKOUTREQLEN;
req->priv = privreq;
req->callback = usbmsc_rdcomplete;
ret = EP_SUBMIT(priv->epbulkout, req);
if (ret < 0)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_RDSUBMIT), (uint16_t)-ret);
goto errout;
}
}
priv->config = config;
return OK;
errout:
usbmsc_resetconfig(priv);
return ret;
}
/****************************************************************************
* Name: usbmsc_resetconfig
*
* Description:
* Mark the device as not configured and disable all endpoints.
*
****************************************************************************/
void usbmsc_resetconfig(FAR struct usbmsc_dev_s *priv)
{
/* Are we configured? */
if (priv->config != USBMSC_CONFIGIDNONE)
{
/* Yes.. but not anymore */
priv->config = USBMSC_CONFIGIDNONE;
/* Disable endpoints. This should force completion of all pending
* transfers.
*/
EP_DISABLE(priv->epbulkin);
EP_DISABLE(priv->epbulkout);
}
}
/****************************************************************************
* Name: usbmsc_wrcomplete
*
* Description:
* Handle completion of write request. This function probably executes
* in the context of an interrupt handler.
*
****************************************************************************/
void usbmsc_wrcomplete(FAR struct usbdev_ep_s *ep, FAR struct usbdev_req_s *req)
{
FAR struct usbmsc_dev_s *priv;
FAR struct usbmsc_req_s *privreq;
irqstate_t flags;
/* Sanity check */
#ifdef CONFIG_DEBUG
if (!ep || !ep->priv || !req || !req->priv)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_WRCOMPLETEINVALIDARGS), 0);
return;
}
#endif
/* Extract references to private data */
priv = (FAR struct usbmsc_dev_s*)ep->priv;
privreq = (FAR struct usbmsc_req_s *)req->priv;
/* Return the write request to the free list */
flags = irqsave();
sq_addlast((sq_entry_t*)privreq, &priv->wrreqlist);
irqrestore(flags);
/* Process the received data unless this is some unusual condition */
switch (req->result)
{
case OK: /* Normal completion */
usbtrace(TRACE_CLASSWRCOMPLETE, req->xfrd);
break;
case -ESHUTDOWN: /* Disconnection */
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_WRSHUTDOWN), 0);
break;
default: /* Some other error occurred */
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_WRUNEXPECTED),
(uint16_t)-req->result);
break;
};
/* Inform the worker thread that a write request has been returned */
priv->theventset |= USBMSC_EVENT_WRCOMPLETE;
usbmsc_scsi_signal(priv);
}
/****************************************************************************
* Name: usbmsc_rdcomplete
*
* Description:
* Handle completion of read request on the bulk OUT endpoint. This
* is handled like the receipt of serial data on the "UART"
*
****************************************************************************/
void usbmsc_rdcomplete(FAR struct usbdev_ep_s *ep, FAR struct usbdev_req_s *req)
{
FAR struct usbmsc_dev_s *priv;
FAR struct usbmsc_req_s *privreq;
irqstate_t flags;
int ret;
/* Sanity check */
#ifdef CONFIG_DEBUG
if (!ep || !ep->priv || !req || !req->priv)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_RDCOMPLETEINVALIDARGS), 0);
return;
}
#endif
/* Extract references to private data */
priv = (FAR struct usbmsc_dev_s*)ep->priv;
privreq = (FAR struct usbmsc_req_s *)req->priv;
/* Process the received data unless this is some unusual condition */
switch (req->result)
{
case 0: /* Normal completion */
{
usbtrace(TRACE_CLASSRDCOMPLETE, req->xfrd);
/* Add the filled read request from the rdreqlist */
flags = irqsave();
sq_addlast((sq_entry_t*)privreq, &priv->rdreqlist);
irqrestore(flags);
/* Signal the worker thread that there is received data to be processed */
priv->theventset |= USBMSC_EVENT_RDCOMPLETE;
usbmsc_scsi_signal(priv);
}
break;
case -ESHUTDOWN: /* Disconnection */
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_RDSHUTDOWN), 0);
/* Drop the read request... it will be cleaned up later */
}
break;
default: /* Some other error occurred */
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_RDUNEXPECTED),
(uint16_t)-req->result);
/* Return the read request to the bulk out endpoint for re-filling */
req = privreq->req;
req->priv = privreq;
req->callback = usbmsc_rdcomplete;
ret = EP_SUBMIT(priv->epbulkout, req);
if (ret != OK)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_RDCOMPLETERDSUBMIT),
(uint16_t)-ret);
}
}
break;
}
}
/****************************************************************************
* Name: usbmsc_deferredresponse
*
* Description:
* Some EP0 setup request cannot be responded to immediately becuase they
* require some asynchronous action from the SCSI worker thread. This
* function is provided for the SCSI thread to make that deferred response.
* The specific requests that require this deferred response are:
*
* 1. USB_REQ_SETCONFIGURATION,
* 2. USB_REQ_SETINTERFACE, or
* 3. USBMSC_REQ_MSRESET
*
* In all cases, the success reponse is a zero-length packet; the failure
* response is an EP0 stall.
*
* Input parameters:
* priv - Private state structure for this USB storage instance
* stall - true is the action failed and a stall is required
*
****************************************************************************/
void usbmsc_deferredresponse(FAR struct usbmsc_dev_s *priv, bool failed)
{
FAR struct usbdev_s *dev;
FAR struct usbdev_req_s *ctrlreq;
int ret;
#ifdef CONFIG_DEBUG
if (!priv || !priv->usbdev || !priv->ctrlreq)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_DEFERREDRESPINVALIDARGS), 0);
return;
}
#endif
dev = priv->usbdev;
ctrlreq = priv->ctrlreq;
/* If no error occurs, respond to the deferred setup command with a null
* packet.
*/
if (!failed)
{
ctrlreq->len = 0;
ctrlreq->flags = USBDEV_REQFLAGS_NULLPKT;
ret = EP_SUBMIT(dev->ep0, ctrlreq);
if (ret < 0)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_DEFERREDRESPSUBMIT),
(uint16_t)-ret);
#if 0 /* Not necessary */
ctrlreq->result = OK;
usbmsc_ep0incomplete(dev->ep0, ctrlreq);
#endif
}
}
else
{
/* On a failure, the USB driver will stall. */
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_DEFERREDRESPSTALLED), 0);
EP_STALL(dev->ep0);
}
}
/****************************************************************************
* Name: usbmsc_sync_wait
*
* Description:
* Wait for the worker thread to obtain the USB MSC state data
*
****************************************************************************/
static inline void usbmsc_sync_wait(FAR struct usbmsc_dev_s *priv)
{
int ret;
do
{
ret = sem_wait(&priv->thsynch);
DEBUGASSERT(ret == OK || errno == EINTR);
}
while (ret < 0);
}
/****************************************************************************
* User Interfaces
****************************************************************************/
/****************************************************************************
* Name: usbmsc_configure
*
* Description:
* One-time initialization of the USB storage driver. The initialization
* sequence is as follows:
*
* 1. Call usbmsc_configure to perform one-time initialization specifying
* the number of luns.
* 2. Call usbmsc_bindlun to configure each supported LUN
* 3. Call usbmsc_exportluns when all LUNs are configured
*
* Input Parameters:
* nluns - the number of LUNs that will be registered
* handle - Location to return a handle that is used in other API calls.
*
* Returned Value:
* 0 on success; a negated errno on failure
*
****************************************************************************/
int usbmsc_configure(unsigned int nluns, void **handle)
{
FAR struct usbmsc_alloc_s *alloc;
FAR struct usbmsc_dev_s *priv;
FAR struct usbmsc_driver_s *drvr;
int ret;
#ifdef CONFIG_DEBUG
if (nluns > 15)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_TOOMANYLUNS), 0);
return -EDOM;
}
#endif
/* Allocate the structures needed */
alloc = (FAR struct usbmsc_alloc_s*)kmm_malloc(sizeof(struct usbmsc_alloc_s));
if (!alloc)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_ALLOCDEVSTRUCT), 0);
return -ENOMEM;
}
/* Initialize the USB storage driver structure */
priv = &alloc->dev;
memset(priv, 0, sizeof(struct usbmsc_dev_s));
sem_init(&priv->thsynch, 0, 0);
sem_init(&priv->thlock, 0, 1);
sem_init(&priv->thwaitsem, 0, 0);
sq_init(&priv->wrreqlist);
priv->nluns = nluns;
/* Allocate the LUN table */
priv->luntab = (struct usbmsc_lun_s*)kmm_malloc(priv->nluns*sizeof(struct usbmsc_lun_s));
if (!priv->luntab)
{
ret = -ENOMEM;
goto errout;
}
memset(priv->luntab, 0, priv->nluns * sizeof(struct usbmsc_lun_s));
/* Initialize the USB class driver structure */
drvr = &alloc->drvr;
#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;
/* Return the handle and success */
*handle = (FAR void*)alloc;
return OK;
errout:
usbmsc_uninitialize(alloc);
return ret;
}
/****************************************************************************
* Name: usbmsc_bindlun
*
* Description:
* Bind the block driver specified by drvrpath to a USB storage LUN.
*
* Input Parameters:
* handle - The handle returned by a previous call to usbmsc_configure().
* drvrpath - the full path to the block driver
* startsector - A sector offset into the block driver to the start of the
* partition on drvrpath (0 if no partitions)
* nsectors - The number of sectors in the partition (if 0, all sectors
* to the end of the media will be exported).
* lunno - the LUN to bind to
*
* Returned Value:
* 0 on success; a negated errno on failure.
*
****************************************************************************/
int usbmsc_bindlun(FAR void *handle, FAR const char *drvrpath,
unsigned int lunno, off_t startsector, size_t nsectors,
bool readonly)
{
FAR struct usbmsc_alloc_s *alloc = (FAR struct usbmsc_alloc_s *)handle;
FAR struct usbmsc_dev_s *priv;
FAR struct usbmsc_lun_s *lun;
FAR struct inode *inode;
struct geometry geo;
int ret;
#ifdef CONFIG_DEBUG
if (!alloc || !drvrpath || startsector < 0)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_BINLUNINVALIDARGS1), 0);
return -EINVAL;
}
#endif
priv = &alloc->dev;
#ifdef CONFIG_DEBUG
if (!priv->luntab)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_INTERNALCONFUSION1), 0);
return -EIO;
}
if (lunno > priv->nluns)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_BINDLUNINVALIDARGS2), 0);
return -EINVAL;
}
#endif
lun = &priv->luntab[lunno];
#ifdef CONFIG_DEBUG
if (lun->inode != NULL)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_LUNALREADYBOUND), 0);
return -EBUSY;
}
#endif
/* Open the block driver */
ret = open_blockdriver(drvrpath, 0, &inode);
if (ret < 0)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_BLKDRVEOPEN), 0);
return ret;
}
/* Get the drive geometry */
if (!inode || !inode->u.i_bops || !inode->u.i_bops->geometry ||
inode->u.i_bops->geometry(inode, &geo) != OK || !geo.geo_available)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_NOGEOMETRY), 0);
return -ENODEV;
}
/* Verify that the partition parameters are valid */
if (startsector >= geo.geo_nsectors)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_BINDLUNINVALIDARGS3), 0);
return -EDOM;
}
else if (nsectors == 0)
{
nsectors = geo.geo_nsectors - startsector;
}
else if (startsector + nsectors >= geo.geo_nsectors)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_BINDLUNINVALIDARGS4), 0);
return -EDOM;
}
/* Initialize the LUN structure */
memset(lun, 0, sizeof(struct usbmsc_lun_s *));
/* Allocate an I/O buffer big enough to hold one hardware sector. SCSI commands
* are processed one at a time so all LUNs may share a single I/O buffer. The
* I/O buffer will be allocated so that is it as large as the largest block
* device sector size
*/
if (!priv->iobuffer)
{
priv->iobuffer = (uint8_t*)kmm_malloc(geo.geo_sectorsize);
if (!priv->iobuffer)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_ALLOCIOBUFFER), geo.geo_sectorsize);
return -ENOMEM;
}
priv->iosize = geo.geo_sectorsize;
}
else if (priv->iosize < geo.geo_sectorsize)
{
void *tmp;
tmp = (uint8_t*)kmm_realloc(priv->iobuffer, geo.geo_sectorsize);
if (!tmp)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_REALLOCIOBUFFER), geo.geo_sectorsize);
return -ENOMEM;
}
priv->iobuffer = (uint8_t*)tmp;
priv->iosize = geo.geo_sectorsize;
}
lun->inode = inode;
lun->startsector = startsector;
lun->nsectors = nsectors;
lun->sectorsize = geo.geo_sectorsize;
/* If the driver does not support the write method, then this is read-only */
if (!inode->u.i_bops->write)
{
lun->readonly = true;
}
return OK;
}
/****************************************************************************
* Name: usbmsc_unbindlun
*
* Description:
* Un-bind the block driver for the specified LUN
*
* Input Parameters:
* handle - The handle returned by a previous call to usbmsc_configure().
* lun - the LUN to unbind from
*
* Returned Value:
* 0 on success; a negated errno on failure.
*
****************************************************************************/
int usbmsc_unbindlun(FAR void *handle, unsigned int lunno)
{
FAR struct usbmsc_alloc_s *alloc = (FAR struct usbmsc_alloc_s *)handle;
FAR struct usbmsc_dev_s *priv;
FAR struct usbmsc_lun_s *lun;
int ret;
#ifdef CONFIG_DEBUG
if (!alloc)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_UNBINDLUNINVALIDARGS1), 0);
return -EINVAL;
}
#endif
priv = &alloc->dev;
#ifdef CONFIG_DEBUG
if (!priv->luntab)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_INTERNALCONFUSION2), 0);
return -EIO;
}
if (lunno > priv->nluns)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_UNBINDLUNINVALIDARGS2), 0);
return -EINVAL;
}
#endif
lun = &priv->luntab[lunno];
usbmsc_scsi_lock(priv);
#ifdef CONFIG_DEBUG
if (lun->inode == NULL)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_LUNNOTBOUND), 0);
ret = -EBUSY;
}
else
#endif
{
/* Close the block driver */
usbmsc_lununinitialize(lun);
ret = OK;
}
usbmsc_scsi_unlock(priv);
return ret;
}
/****************************************************************************
* Name: usbmsc_exportluns
*
* Description:
* After all of the LUNs have been bound, this function may be called
* in order to export those LUNs in the USB storage device.
*
* Input Parameters:
* handle - The handle returned by a previous call to usbmsc_configure().
*
* Returned Value:
* 0 on success; a negated errno on failure
*
****************************************************************************/
#ifdef CONFIG_USBMSC_COMPOSITE
static
#endif
int usbmsc_exportluns(FAR void *handle)
{
FAR struct usbmsc_alloc_s *alloc = (FAR struct usbmsc_alloc_s *)handle;
FAR struct usbmsc_dev_s *priv;
FAR struct usbmsc_driver_s *drvr;
irqstate_t flags;
int ret = OK;
#ifdef CONFIG_DEBUG
if (!alloc)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_EXPORTLUNSINVALIDARGS), 0);
return -ENXIO;
}
#endif
priv = &alloc->dev;
drvr = &alloc->drvr;
/* Start the worker thread
*
* REVISIT: g_usbmsc_handoff is a global and, hence, really requires
* some protection against re-entrant usage.
*/
usbmsc_scsi_lock(priv);
priv->thstate = USBMSC_STATE_NOTSTARTED;
priv->theventset = USBMSC_EVENT_NOEVENTS;
g_usbmsc_handoff = priv;
uvdbg("Starting SCSI worker thread\n");
priv->thpid = kernel_thread("scsid", CONFIG_USBMSC_SCSI_PRIO,
CONFIG_USBMSC_SCSI_STACKSIZE,
usbmsc_scsi_main, NULL);
if (priv->thpid <= 0)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_THREADCREATE), (uint16_t)errno);
goto errout_with_lock;
}
/* Wait for the worker thread to run and initialize */
uvdbg("Waiting for the SCSI worker thread\n");
usbmsc_sync_wait(priv);
DEBUGASSERT(g_usbmsc_handoff == NULL);
/* Register the USB storage class driver (unless we are part of a composite device) */
#ifndef CONFIG_USBMSC_COMPOSITE
ret = usbdev_register(&drvr->drvr);
if (ret != OK)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_DEVREGISTER), (uint16_t)-ret);
goto errout_with_lock;
}
#endif
/* Signal to start the thread */
uvdbg("Signalling for the SCSI worker thread\n");
flags = irqsave();
priv->theventset |= USBMSC_EVENT_READY;
usbmsc_scsi_signal(priv);
irqrestore(flags);
errout_with_lock:
usbmsc_scsi_unlock(priv);
return ret;
}
/****************************************************************************
* Name: usbmsc_classobject
*
* Description:
* Register USB mass storage device and return the class object.
*
* Input Parameters:
* classdev - The location to return the CDC serial class' device
* instance.
*
* Returned Value:
* 0 on success; a negated errno on failure
*
****************************************************************************/
#ifdef CONFIG_USBMSC_COMPOSITE
int usbmsc_classobject(FAR void *handle,
FAR struct usbdevclass_driver_s **classdev)
{
FAR struct usbmsc_alloc_s *alloc = (FAR struct usbmsc_alloc_s *)handle;
int ret;
DEBUGASSERT(handle && classdev);
/* Export the LUNs as with the "standalone" USB mass storage driver, but
* don't register the class instance with the USB device infrastructure.
*/
ret = usbmsc_exportluns(handle);
if (ret == OK)
{
/* On sucess, return an (typed) instance of the class instance */
*classdev = &alloc->drvr.drvr;
}
return ret;
}
#endif
/****************************************************************************
* Name: usbmsc_uninitialize
*
* Description:
* Un-initialize the USB storage class driver
*
* Input Parameters:
* handle - The handle returned by a previous call to usbmsc_configure().
*
* Returned Value:
* None
*
****************************************************************************/
void usbmsc_uninitialize(FAR void *handle)
{
FAR struct usbmsc_alloc_s *alloc = (FAR struct usbmsc_alloc_s *)handle;
FAR struct usbmsc_dev_s *priv;
irqstate_t flags;
#if 0
void *value;
#endif
int i;
#ifdef CONFIG_DEBUG
if (!handle)
{
usbtrace(TRACE_CLSERROR(USBMSC_TRACEERR_UNINITIALIZEINVALIDARGS), 0);
return;
}
#endif
priv = &alloc->dev;
#ifdef CONFIG_USBMSC_COMPOSITE
/* Check for pass 2 uninitialization. We did most of the work on the
* first pass uninitialization.
*/
if (priv->thpid == 0)
{
/* In this second and final pass, all that remains to be done is to
* free the memory resources.
*/
kmm_free(priv);
return;
}
#endif
/* If the thread hasn't already exitted, tell it to exit now */
if (priv->thstate != USBMSC_STATE_NOTSTARTED)
{
/* The thread was started.. Is it still running? */
usbmsc_scsi_lock(priv);
if (priv->thstate != USBMSC_STATE_TERMINATED)
{
/* Yes.. Ask the thread to stop */
flags = irqsave();
priv->theventset |= USBMSC_EVENT_TERMINATEREQUEST;
usbmsc_scsi_signal(priv);
irqrestore(flags);
}
usbmsc_scsi_unlock(priv);
/* Wait for the thread to exit */
while ((priv->theventset & USBMSC_EVENT_TERMINATEREQUEST) != 0)
{
usbmsc_sync_wait(priv);
}
}
priv->thpid = 0;
/* Unregister the driver (unless we are a part of a composite device) */
#ifndef CONFIG_USBMSC_COMPOSITE
usbdev_unregister(&alloc->drvr.drvr);
#endif
/* Uninitialize and release the LUNs */
for (i = 0; i < priv->nluns; ++i)
{
usbmsc_lununinitialize(&priv->luntab[i]);
}
kmm_free(priv->luntab);
/* Release the I/O buffer */
if (priv->iobuffer)
{
kmm_free(priv->iobuffer);
}
/* Uninitialize and release the driver structure */
sem_destroy(&priv->thsynch);
sem_destroy(&priv->thlock);
sem_destroy(&priv->thwaitsem);
#ifndef CONFIG_USBMSC_COMPOSITE
/* For the case of the composite driver, there is a two pass
* uninitialization sequence. We cannot yet free the driver structure.
* We will do that on the second pass (and we will know that it is the
* second pass because of priv->thpid == 0)
*/
kmm_free(priv);
#endif
}
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