/**************************************************************************** * drivers/usbdev/usbmsc.h * * Copyright (C) 2008-2012 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Mass storage class device. Bulk-only with SCSI subclass. * * 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. * ****************************************************************************/ #ifndef __DRIVERS_USBDEV_USBMSC_H #define __DRIVERS_USBDEV_USBMSC_H /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include #include /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Configuration ************************************************************/ /* If the USB mass storage device is configured as part of a composite device * then both CONFIG_USBDEV_COMPOSITE and CONFIG_USBMSC_COMPOSITE must be * defined. */ #ifndef CONFIG_USBDEV_COMPOSITE # undef CONFIG_USBMSC_COMPOSITE #endif #if defined(CONFIG_USBMSC_COMPOSITE) && !defined(CONFIG_USBMSC_STRBASE) # define CONFIG_USBMSC_STRBASE (4) #endif /* Interface IDs. If the mass storage driver is built as a component of a * composite device, then the interface IDs may need to be offset. */ #ifndef CONFIG_USBMSC_COMPOSITE # undef CONFIG_USBMSC_IFNOBASE # define CONFIG_USBMSC_IFNOBASE 0 #endif #ifndef CONFIG_USBMSC_IFNOBASE # define CONFIG_USBMSC_IFNOBASE 0 #endif /* Number of requests in the write queue */ #ifndef CONFIG_USBMSC_NWRREQS # define CONFIG_USBMSC_NWRREQS 4 #endif /* Number of requests in the read queue */ #ifndef CONFIG_USBMSC_NRDREQS # define CONFIG_USBMSC_NRDREQS 4 #endif /* Logical endpoint numbers / max packet sizes */ #ifndef CONFIG_USBMSC_EPBULKOUT # warning "EPBULKOUT not defined in the configuration" # define CONFIG_USBMSC_EPBULKOUT 2 #endif #ifndef CONFIG_USBMSC_EPBULKIN # warning "EPBULKIN not defined in the configuration" # define CONFIG_USBMSC_EPBULKIN 3 #endif /* Packet and request buffer sizes */ #ifndef CONFIG_USBMSC_COMPOSITE # ifndef CONFIG_USBMSC_EP0MAXPACKET # define CONFIG_USBMSC_EP0MAXPACKET 64 # endif #endif #ifndef CONFIG_USBMSC_BULKINREQLEN # ifdef CONFIG_USBDEV_DUALSPEED # define CONFIG_USBMSC_BULKINREQLEN 512 # else # define CONFIG_USBMSC_BULKINREQLEN 64 # endif #else # ifdef CONFIG_USBDEV_DUALSPEED # if CONFIG_USBMSC_BULKINREQLEN < 512 # warning "Bulk in buffer size smaller than max packet" # undef CONFIG_USBMSC_BULKINREQLEN # define CONFIG_USBMSC_BULKINREQLEN 512 # endif # else # if CONFIG_USBMSC_BULKINREQLEN < 64 # warning "Bulk in buffer size smaller than max packet" # undef CONFIG_USBMSC_BULKINREQLEN # define CONFIG_USBMSC_BULKINREQLEN 64 # endif # endif #endif #ifndef CONFIG_USBMSC_BULKOUTREQLEN # ifdef CONFIG_USBDEV_DUALSPEED # define CONFIG_USBMSC_BULKOUTREQLEN 512 # else # define CONFIG_USBMSC_BULKOUTREQLEN 64 # endif #else # ifdef CONFIG_USBDEV_DUALSPEED # if CONFIG_USBMSC_BULKOUTREQLEN < 512 # warning "Bulk in buffer size smaller than max packet" # undef CONFIG_USBMSC_BULKOUTREQLEN # define CONFIG_USBMSC_BULKOUTREQLEN 512 # endif # else # if CONFIG_USBMSC_BULKOUTREQLEN < 64 # warning "Bulk in buffer size smaller than max packet" # undef CONFIG_USBMSC_BULKOUTREQLEN # define CONFIG_USBMSC_BULKOUTREQLEN 64 # endif # endif #endif /* Vendor and product IDs and strings */ #ifndef CONFIG_USBMSC_COMPOSITE # ifndef CONFIG_USBMSC_VENDORID # warning "CONFIG_USBMSC_VENDORID not defined" # define CONFIG_USBMSC_VENDORID 0x584e # endif # ifndef CONFIG_USBMSC_PRODUCTID # warning "CONFIG_USBMSC_PRODUCTID not defined" # define CONFIG_USBMSC_PRODUCTID 0x5342 # endif # ifndef CONFIG_USBMSC_VERSIONNO # define CONFIG_USBMSC_VERSIONNO (0x0399) # endif # ifndef CONFIG_USBMSC_VENDORSTR # warning "No Vendor string specified" # define CONFIG_USBMSC_VENDORSTR "NuttX" # endif # ifndef CONFIG_USBMSC_PRODUCTSTR # warning "No Product string specified" # define CONFIG_USBMSC_PRODUCTSTR "USBdev Storage" # endif # undef CONFIG_USBMSC_SERIALSTR # define CONFIG_USBMSC_SERIALSTR "0101" #endif #undef CONFIG_USBMSC_CONFIGSTR #define CONFIG_USBMSC_CONFIGSTR "Bulk" /* Debug -- must be consistent with include/debug.h */ #ifdef CONFIG_CPP_HAVE_VARARGS # ifdef CONFIG_DEBUG # ifdef CONFIG_ARCH_LOWPUTC # define dbgprintf(format, arg...) lib_lowprintf(format, ##arg) # else # define dbgprintf(format, arg...) lib_rawprintf(format, ##arg) # endif # else # define dbgprintf(x...) # endif #else # ifdef CONFIG_DEBUG # ifdef CONFIG_ARCH_LOWPUTC # define dbgprintf lib_lowprintf # else # define dbgprintf lib_rawprintf # endif # else # define dbgprintf (void) # endif #endif /* Packet and request buffer sizes */ #ifndef CONFIG_USBMSC_EP0MAXPACKET # define CONFIG_USBMSC_EP0MAXPACKET 64 #endif /* USB Controller */ #ifndef CONFIG_USBDEV_SELFPOWERED # define SELFPOWERED USB_CONFIG_ATT_SELFPOWER #else # define SELFPOWERED (0) #endif #ifndef CONFIG_USBDEV_REMOTEWAKEUP # define REMOTEWAKEUP USB_CONFIG_ATTR_WAKEUP #else # define REMOTEWAKEUP (0) #endif #ifndef CONFIG_USBDEV_MAXPOWER # define CONFIG_USBDEV_MAXPOWER 100 #endif /* Current state of the worker thread */ #define USBMSC_STATE_NOTSTARTED (0) /* Thread has not yet been started */ #define USBMSC_STATE_STARTED (1) /* Started, but is not yet initialized */ #define USBMSC_STATE_IDLE (2) /* Started and waiting for commands */ #define USBMSC_STATE_CMDPARSE (3) /* Processing a received command */ #define USBMSC_STATE_CMDREAD (4) /* Processing a SCSI read command */ #define USBMSC_STATE_CMDWRITE (5) /* Processing a SCSI write command */ #define USBMSC_STATE_CMDFINISH (6) /* Finish command processing */ #define USBMSC_STATE_CMDSTATUS (7) /* Processing the final status of the command */ #define USBMSC_STATE_TERMINATED (8) /* Thread has exitted */ /* Event communicated to worker thread */ #define USBMSC_EVENT_NOEVENTS (0) /* There are no outstanding events */ #define USBMSC_EVENT_READY (1 << 0) /* Initialization is complete */ #define USBMSC_EVENT_RDCOMPLETE (1 << 1) /* A read has completed there is data to be processed */ #define USBMSC_EVENT_WRCOMPLETE (1 << 2) /* A write has completed and a request is available */ #define USBMSC_EVENT_TERMINATEREQUEST (1 << 3) /* Shutdown requested */ #define USBMSC_EVENT_DISCONNECT (1 << 4) /* USB disconnect received */ #define USBMSC_EVENT_RESET (1 << 5) /* USB storage setup reset received */ #define USBMSC_EVENT_CFGCHANGE (1 << 6) /* USB setup configuration change received */ #define USBMSC_EVENT_IFCHANGE (1 << 7) /* USB setup interface change received */ #define USBMSC_EVENT_ABORTBULKOUT (1 << 8) /* SCSI receive failure */ /* SCSI command flags (passed to usbmsc_setupcmd()) */ #define USBMSC_FLAGS_DIRMASK (0x03) /* Bits 0-1: Data direction */ #define USBMSC_FLAGS_DIRNONE (0x00) /* No data to send */ #define USBMSC_FLAGS_DIRHOST2DEVICE (0x01) /* Host-to-device */ #define USBMSC_FLAGS_DIRDEVICE2HOST (0x02) /* Device-to-host */ #define USBMSC_FLAGS_BLOCKXFR (0x04) /* Bit 2: Command is a block transfer request */ #define USBMSC_FLAGS_LUNNOTNEEDED (0x08) /* Bit 3: Command does not require a valid LUN */ #define USBMSC_FLAGS_UACOKAY (0x10) /* Bit 4: Command OK if unit attention condition */ #define USBMSC_FLAGS_RETAINSENSEDATA (0x20) /* Bit 5: Do not clear sense data */ /* Descriptors **************************************************************/ /* Big enough to hold our biggest descriptor */ #define USBMSC_MXDESCLEN (64) /* String language */ #define USBMSC_STR_LANGUAGE (0x0409) /* en-us */ /* Descriptor strings */ #ifndef CONFIG_USBMSC_COMPOSITE # define USBMSC_MANUFACTURERSTRID (1) # define USBMSC_PRODUCTSTRID (2) # define USBMSC_SERIALSTRID (3) # define USBMSC_CONFIGSTRID (4) # define USBMSC_INTERFACESTRID USBMSC_CONFIGSTRID # undef CONFIG_USBMSC_STRBASE # define CONFIG_USBMSC_STRBASE (4) #else # define USBMSC_INTERFACESTRID (CONFIG_USBMSC_STRBASE+1) #endif #define USBMSC_LASTSTRID USBMSC_INTERFACESTRID #define USBMSC_NCONFIGS (1) /* Number of configurations supported */ /* Configuration Descriptor */ #define USBMSC_NINTERFACES (1) /* Number of interfaces in the configuration */ #define USBMSC_INTERFACEID (CONFIG_USBMSC_IFNOBASE+0) #define USBMSC_ALTINTERFACEID USBMSC_INTERFACEID #define USBMSC_CONFIGIDNONE (0) /* Config ID means to return to address mode */ #define USBMSC_CONFIGID (1) /* The only supported configuration ID */ /* Interface description */ #define USBMSC_NENDPOINTS (2) /* Number of endpoints in the interface */ /* Endpoint configuration */ #define USBMSC_EPOUTBULK_ADDR (CONFIG_USBMSC_EPBULKOUT) #define USBMSC_EPOUTBULK_ATTR (USB_EP_ATTR_XFER_BULK) #define USBMSC_EPINBULK_ADDR (USB_DIR_IN|CONFIG_USBMSC_EPBULKIN) #define USBMSC_EPINBULK_ATTR (USB_EP_ATTR_XFER_BULK) #define USBMSC_HSBULKMAXPACKET (512) #define USBMSC_HSBULKMXPKTSHIFT (9) #define USBMSC_HSBULKMXPKTMASK (0x000001ff) #define USBMSC_FSBULKMAXPACKET (64) #define USBMSC_FSBULKMXPKTSHIFT (6) #define USBMSC_FSBULKMXPKTMASK (0x0000003f) /* Macros for dual speed vs. full speed only operation */ #ifdef CONFIG_USBDEV_DUALSPEED # define USBMSC_EPBULKINDESC(hs) \ usbmsc_getepdesc((hs) ? USBMSC_EPHSBULKIN : USBMSC_EPFSBULKIN) # define USBMSC_EPBULKOUTDESC(hs) \ usbmsc_getepdesc((hs) ? USBMSC_EPHSBULKOUT : USBMSC_EPFSBULKOUT) # define USBMSC_BULKMAXPACKET(hs) \ ((hs) ? USBMSC_HSBULKMAXPACKET : USBMSC_FSBULKMAXPACKET) # define USBMSC_BULKMXPKTSHIFT(d) \ (((d)->speed==USB_SPEED_HIGH) ? USBMSC_HSBULKMXPKTSHIFT : USBMSC_FSBULKMXPKTSHIFT) # define USBMSC_BULKMXPKTMASK(d) \ (((d)->speed==USB_SPEED_HIGH) ? USBMSC_HSBULKMXPKTMASK : USBMSC_FSBULKMXPKTMASK) #else # define USBMSC_EPBULKINDESC(d) usbmsc_getepdesc(USBMSC_EPFSBULKIN) # define USBMSC_EPBULKOUTDESC(d) usbmsc_getepdesc(USBMSC_EPFSBULKOUT) # define USBMSC_BULKMAXPACKET(hs) USBMSC_FSBULKMAXPACKET # define USBMSC_BULKMXPKTSHIFT(d) USBMSC_FSBULKMXPKTSHIFT # define USBMSC_BULKMXPKTMASK(d) USBMSC_FSBULKMXPKTMASK #endif /* Configuration descriptor size */ #ifndef CONFIG_USBMSC_COMPOSITE /* Number of individual descriptors in the configuration descriptor: * (1) Configuration descriptor + (1) interface descriptor + (2) interface * descriptors. */ # define USBMSC_CFGGROUP_SIZE (4) /* The size of the config descriptor: (9 + 9 + 2*7) = 32 */ # define SIZEOF_USBMSC_CFGDESC \ (USB_SIZEOF_CFGDESC + USB_SIZEOF_IFDESC + USBMSC_NENDPOINTS * USB_SIZEOF_EPDESC) #else /* Number of individual descriptors in the configuration descriptor: * (1) interface descriptor + (2) interface descriptors. */ # define USBMSC_CFGGROUP_SIZE (3) /* The size of the config descriptor: (9 + 2*7) = 23 */ # define SIZEOF_USBMSC_CFGDESC \ (USB_SIZEOF_IFDESC + USBMSC_NENDPOINTS * USB_SIZEOF_EPDESC) #endif /* Block driver helpers *****************************************************/ #define USBMSC_DRVR_READ(l,b,s,n) ((l)->inode->u.i_bops->read((l)->inode,b,s,n)) #define USBMSC_DRVR_WRITE(l,b,s,n) ((l)->inode->u.i_bops->write((l)->inode,b,s,n)) #define USBMSC_DRVR_GEOMETRY(l,g) ((l)->inode->u.i_bops->geometry((l)->inode,g)) /* Everpresent MIN/MAX macros ***********************************************/ #ifndef MIN # define MIN(a,b) ((a) < (b) ? (a) : (b)) #endif #ifndef MAX # define MAX(a,b) ((a) > (b) ? (a) : (b)) #endif /**************************************************************************** * Public Types ****************************************************************************/ /* Endpoint descriptors */ enum usbmsc_epdesc_e { USBMSC_EPFSBULKOUT = 0, /* Full speed bulk OUT endpoint descriptor */ USBMSC_EPFSBULKIN /* Full speed bulk IN endpoint descriptor */ #ifdef CONFIG_USBDEV_DUALSPEED , USBMSC_EPHSBULKOUT, /* High speed bulk OUT endpoint descriptor */ USBMSC_EPHSBULKIN /* High speed bulk IN endpoint descriptor */ #endif }; /* Container to support a list of requests */ struct usbmsc_req_s { FAR struct usbmsc_req_s *flink; /* Implements a singly linked list */ FAR struct usbdev_req_s *req; /* The contained request */ }; /* This structure describes one LUN: */ struct usbmsc_lun_s { struct inode *inode; /* Inode structure of open'ed block driver */ uint8_t readonly:1; /* Media is read-only */ uint8_t locked:1; /* Media removal is prevented */ uint16_t sectorsize; /* The size of one sector */ uint32_t sd; /* Sense data */ uint32_t sdinfo; /* Sense data information */ uint32_t uad; /* Unit needs attention data */ off_t startsector; /* Sector offset to start of partition */ size_t nsectors; /* Number of sectors in the partition */ }; /* Describes the overall state of the driver */ struct usbmsc_dev_s { FAR struct usbdev_s *usbdev; /* usbdev driver pointer (Non-null if registered) */ /* Worker thread interface */ pthread_t thread; /* The worker thread */ pthread_mutex_t mutex; /* Mutually exclusive access to resources*/ pthread_cond_t cond; /* Used to signal worker thread */ volatile uint8_t thstate; /* State of the worker thread */ volatile uint16_t theventset; /* Set of pending events signaled to worker thread */ volatile uint8_t thvalue; /* Value passed with the event (must persist) */ /* Storage class configuration and state */ uint8_t nluns:4; /* Number of LUNs */ uint8_t config; /* Configuration number */ /* Endpoints */ FAR struct usbdev_ep_s *epbulkin; /* Bulk IN endpoint structure */ FAR struct usbdev_ep_s *epbulkout; /* Bulk OUT endpoint structure */ FAR struct usbdev_req_s *ctrlreq; /* Control request (for ep0 setup responses) */ /* SCSI command processing */ struct usbmsc_lun_s *lun; /* Currently selected LUN */ struct usbmsc_lun_s *luntab; /* Allocated table of all LUNs */ uint8_t cdb[USBMSC_MAXCDBLEN]; /* Command data (cdb[]) from CBW */ uint8_t phaseerror:1; /* Need to send phase sensing status */ uint8_t shortpacket:1; /* Host transmission stopped unexpectedly */ uint8_t cbwdir:2; /* Direction from CBW. See USBMSC_FLAGS_DIR* definitions */ uint8_t cdblen; /* Length of cdb[] from CBW */ uint8_t cbwlun; /* LUN from the CBW */ uint16_t nsectbytes; /* Bytes buffered in iobuffer[] */ uint16_t nreqbytes; /* Bytes buffered in head write requests */ uint16_t iosize; /* Size of iobuffer[] */ uint32_t cbwlen; /* Length of data from CBW */ uint32_t cbwtag; /* Tag from the CBW */ union { uint32_t xfrlen; /* Read/Write: Sectors remaining to be transferred */ uint32_t alloclen; /* Other device-to-host: Host allocation length */ } u; uint32_t sector; /* Current sector (relative to lun->startsector) */ uint32_t residue; /* Untransferred amount reported in the CSW */ uint8_t *iobuffer; /* Buffer for data transfers */ /* Write request list */ struct sq_queue_s wrreqlist; /* List of empty write request containers */ struct sq_queue_s rdreqlist; /* List of filled read request containers */ /* Pre-allocated write request containers. The write requests will * be linked in a free list (wrreqlist), and used to send requests to * EPBULKIN; Read requests will be queued in the EBULKOUT. */ struct usbmsc_req_s wrreqs[CONFIG_USBMSC_NWRREQS]; struct usbmsc_req_s rdreqs[CONFIG_USBMSC_NRDREQS]; }; /**************************************************************************** * Public Data ****************************************************************************/ #undef EXTERN #if defined(__cplusplus) # define EXTERN extern "C" extern "C" { #else # define EXTERN extern #endif /* String *******************************************************************/ /* Mass storage class vendor/product/serial number strings */ #ifndef CONFIG_USBMSC_COMPOSITE EXTERN const char g_mscvendorstr[]; EXTERN const char g_mscproductstr[]; EXTERN const char g_mscserialstr[]; /* If we are using a composite device, then vendor/product/serial number strings * are provided by the composite device logic. */ #else EXTERN const char g_compvendorstr[]; EXTERN const char g_compproductstr[]; EXTERN const char g_compserialstr[]; #define g_mscvendorstr g_compvendorstr #define g_mscproductstr g_compproductstr #define g_mscserialstr g_compserialstr #endif /************************************************************************************ * Public Function Prototypes ************************************************************************************/ /************************************************************************************ * Name: usbmsc_mkstrdesc * * Description: * Construct a string descriptor * ************************************************************************************/ struct usb_strdesc_s; int usbmsc_mkstrdesc(uint8_t id, struct usb_strdesc_s *strdesc); /************************************************************************************ * Name: usbmsc_getepdesc * * Description: * Return a pointer to the raw device descriptor * ************************************************************************************/ #ifndef CONFIG_USBMSC_COMPOSITE FAR const struct usb_devdesc_s *usbmsc_getdevdesc(void); #endif /************************************************************************************ * Name: usbmsc_getepdesc * * Description: * Return a pointer to the raw endpoint descriptor (used for configuring endpoints) * ************************************************************************************/ struct usb_epdesc_s; FAR const struct usb_epdesc_s *usbmsc_getepdesc(enum usbmsc_epdesc_e epid); /************************************************************************************ * Name: usbmsc_mkcfgdesc * * Description: * Construct the configuration descriptor * ************************************************************************************/ #ifdef CONFIG_USBDEV_DUALSPEED int16_t usbmsc_mkcfgdesc(FAR uint8_t *buf, uint8_t speed, uint8_t type); #else int16_t usbmsc_mkcfgdesc(FAR uint8_t *buf); #endif /************************************************************************************ * Name: usbmsc_getqualdesc * * Description: * Return a pointer to the raw qual descriptor * ************************************************************************************/ #if !defined(CONFIG_USBMSC_COMPOSITE) && defined(CONFIG_USBDEV_DUALSPEED) FAR const struct usb_qualdesc_s *usbmsc_getqualdesc(void); #endif /**************************************************************************** * Name: usbmsc_workerthread * * Description: * This is the main function of the USB storage worker thread. It loops * until USB-related events occur, then processes those events accordingly * ****************************************************************************/ EXTERN void *usbmsc_workerthread(void *arg); /**************************************************************************** * Name: usbmsc_setconfig * * Description: * Set the device configuration by allocating and configuring endpoints and * by allocating and queue read and write requests. * ****************************************************************************/ EXTERN int usbmsc_setconfig(FAR struct usbmsc_dev_s *priv, uint8_t config); /**************************************************************************** * Name: usbmsc_resetconfig * * Description: * Mark the device as not configured and disable all endpoints. * ****************************************************************************/ EXTERN void usbmsc_resetconfig(FAR struct usbmsc_dev_s *priv); /**************************************************************************** * Name: usbmsc_wrcomplete * * Description: * Handle completion of write request. This function probably executes * in the context of an interrupt handler. * ****************************************************************************/ EXTERN void usbmsc_wrcomplete(FAR struct usbdev_ep_s *ep, FAR struct usbdev_req_s *req); /**************************************************************************** * 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" * ****************************************************************************/ EXTERN void usbmsc_rdcomplete(FAR struct usbdev_ep_s *ep, FAR struct usbdev_req_s *req); /**************************************************************************** * 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 * ****************************************************************************/ EXTERN void usbmsc_deferredresponse(FAR struct usbmsc_dev_s *priv, bool failed); #undef EXTERN #if defined(__cplusplus) } #endif #endif /* #define __DRIVERS_USBDEV_USBMSC_H */