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incubator-nuttx/include/nuttx/usb/usbdev.h

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/************************************************************************************
* include/nuttx/usb/usbdev.h
*
* Copyright (C) 2008-2010, 2012-2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* NOTE: This interface was inspired by the Linux gadget interface by
* David Brownell. That work was very helpful in determining a usable
* partitioning of functionality between standard class drivers and various
* implementations of USB controller drivers. This work, however, does
* not derive directly from that work and is licensed differently.
*
* 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 __INCLUDE_NUTTX_USB_USBDEV_H
#define __INCLUDE_NUTTX_USB_USBDEV_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <nuttx/usb/pl2303.h>
#include <nuttx/usb/cdcacm.h>
#include <nuttx/usb/usbmsc.h>
#include <nuttx/usb/composite.h>
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* Endpoint helpers *****************************************************************/
/* Configure endpoint, making it usable. The class driver may deallocate or re-use
* the 'desc' structure after returning:
*
* ep - the struct usbdev_ep_s instance obtained from allocep()
* desc - A struct usb_epdesc_s instance describing the endpoint
* last - true if this this last endpoint to be configured. Some hardware needs
* to take special action when all of the endpoints have been configured.
*/
#define EP_CONFIGURE(ep,desc,last) (ep)->ops->configure(ep,desc,last)
/* The endpoint will no longer be used */
#define EP_DISABLE(ep) (ep)->ops->disable(ep)
/* Allocate/free I/O requests. Should not be called from interrupt processing! */
#define EP_ALLOCREQ(ep) (ep)->ops->allocreq(ep)
#define EP_FREEREQ(ep,req) (ep)->ops->freereq(ep,req)
/* Allocate/free an I/O buffer. Should not be called from interrupt processing! */
#ifdef CONFIG_USBDEV_DMA
# define EP_ALLOCBUFFER(ep,nb) (ep)->ops->allocbuffer(ep,nb)
# define EP_FREEBUFFER(ep,buf) (ep)->ops->freebuffer(ep,buf)
#else
# define EP_ALLOCBUFFER(ep,nb) malloc(nb)
# define EP_FREEBUFFER(ep,buf) free(buf)
#endif
/* Submit an I/O request to the endpoint */
#define EP_SUBMIT(ep,req) (ep)->ops->submit(ep,req)
/* Cancel an I/O request previously sent to an endpoint */
#define EP_CANCEL(ep,req) (ep)->ops->cancel(ep,req)
/* Stall or resume an endpoint */
#define EP_STALL(ep) (ep)->ops->stall(ep,false)
#define EP_RESUME(ep) (ep)->ops->stall(ep,true)
/* USB Device Driver Helpers ********************************************************/
/* Allocate an endpoint:
*
* ep - 7-bit logical endpoint number (direction bit ignored). Zero means
* that any endpoint matching the other requirements will suffice. The
* assigned endpoint can be found in the eplog field.
* in - true: IN (device-to-host) endpoint requested
* eptype - Endpoint type. One of {USB_EP_ATTR_XFER_ISOC, USB_EP_ATTR_XFER_BULK,
* USB_EP_ATTR_XFER_INT}
*/
#define DEV_ALLOCEP(dev,ep,in,type) (dev)->ops->allocep(dev,ep,in,type)
/* Release an endpoint */
#define DEV_FREEEP(dev,ep) (dev)->ops->freeep(dev,ep)
/* Returns the current frame number */
#define DEV_GETFRAME(dev) (dev)->ops->getframe(dev)
/* Tries to wake up the host connected to this device */
#define DEV_WAKEUP(dev) (dev)->ops->wakeup(dev)
/* Sets the device selfpowered feature */
#define DEV_SETSELFPOWERED(dev) (dev)->ops->selfpowered(dev,true)
/* Clears the device selfpowered feature */
#define DEV_CLRSELFPOWERED(dev) (dev)->ops->selfpowered(dev, false)
/* Software-controlled connect to USB host. All USB class drivers need to call
* DEV_CONNECT() when they are ready to be enumerated. That is, (1) initially when
* bound to the USB driver, and (2) after a USB reset.
*/
#define DEV_CONNECT(dev) (dev)->ops->pullup ? (dev)->ops->pullup(dev,true) : -EOPNOTSUPP
/* Software-controlled disconnect from USB host */
#define DEV_DISCONNECT(dev) (dev)->ops->pullup ? (dev)->ops->pullup(dev,false) : -EOPNOTSUPP
/* USB Class Driver Helpers *********************************************************/
/* All may be called from interrupt handling logic except bind() and unbind() */
/* Invoked when the driver is bound to a USB device driver. */
#define CLASS_BIND(drvr,dev) (drvr)->ops->bind(drvr,dev)
/* Invoked when the driver is unbound from a USB device driver */
#define CLASS_UNBIND(drvr,dev) (drvr)->ops->unbind(drvr,dev)
/* Invoked after all transfers have been stopped, when the host is disconnected. */
#define CLASS_DISCONNECT(drvr,dev) (drvr)->ops->disconnect(drvr,dev)
/* Invoked for ep0 control requests */
#define CLASS_SETUP(drvr,dev,ctrl,dataout,outlen) \
(drvr)->ops->setup(drvr,dev,ctrl,dataout,outlen)
/* Invoked on USB suspend. */
#define CLASS_SUSPEND(drvr,dev) \
do { if ((drvr)->ops->suspend) (drvr)->ops->suspend(drvr,dev); } while (0)
/* Invoked on USB resume */
#define CLASS_RESUME(drvr,dev) \
do { if ((drvr)->ops->resume) (drvr)->ops->resume(drvr,dev); } while (0)
/* Maximum size of a request buffer */
#define USBDEV_MAXREQUEUST UINT16_MAX
/* Request flags */
#define USBDEV_REQFLAGS_NULLPKT 1 /* Bit 0: Terminate w/short packet; null packet if necessary */
/* Bits 1-7: Available */
/************************************************************************************
* Public Types
************************************************************************************/
/* USB Controller Structures ********************************************************/
/* struct usbdev_req_s - describes one i/o request */
struct usbdev_ep_s;
struct usbdev_req_s
{
uint8_t *buf; /* Call: Buffer used for data; Return: Unchanged */
uint8_t flags; /* See USBDEV_REQFLAGS_* definitions */
uint16_t len; /* Call: Total length of data in buf; Return: Unchanged */
uint16_t xfrd; /* Call: zero; Return: Bytes transferred so far */
int16_t result; /* Call: zero; Return: Result of transfer (O or -errno) */
/* Callback when the transfer completes */
void (*callback)(FAR struct usbdev_ep_s *ep, FAR struct usbdev_req_s *req);
void *priv; /* Used only by callee */
};
/* Endpoint-specific interface to USB controller hardware. */
struct usbdev_epops_s
{
/* Configure/enable and disable endpoint */
int (*configure)(FAR struct usbdev_ep_s *ep, FAR const struct usb_epdesc_s *desc,
bool last);
int (*disable)(FAR struct usbdev_ep_s *ep);
/* Allocate and free I/O requests */
FAR struct usbdev_req_s *(*allocreq)(FAR struct usbdev_ep_s *ep);
void (*freereq)(FAR struct usbdev_ep_s *ep, FAR struct usbdev_req_s *req);
/* Allocate and free I/O buffers */
#ifdef CONFIG_USBDEV_DMA
FAR void *(*allocbuffer)(FAR struct usbdev_ep_s *ep, uint16_t nbytes);
void (*freebuffer)(FAR struct usbdev_ep_s *ep, FAR void *buf);
#endif
/* Submit and cancel I/O requests */
int (*submit)(FAR struct usbdev_ep_s *ep, FAR struct usbdev_req_s *req);
int (*cancel)(FAR struct usbdev_ep_s *ep, FAR struct usbdev_req_s *req);
/* Stall or resume an endpoint */
int (*stall)(FAR struct usbdev_ep_s *ep, bool resume);
};
/* Representation of one USB endpoint */
struct usbdev_ep_s
{
const struct usbdev_epops_s *ops; /* Endpoint operations */
uint8_t eplog; /* Logical endpoint address */
uint16_t maxpacket; /* Maximum packet size for this endpoint */
void *priv; /* For use by class driver */
};
/* struct usbdev_s represents a usb device */
struct usbdev_s;
struct usbdev_ops_s
{
/* Allocate and free endpoints */
FAR struct usbdev_ep_s *(*allocep)(FAR struct usbdev_s *dev, uint8_t epphy,
bool in, uint8_t eptype);
void (*freeep)(FAR struct usbdev_s *dev, FAR struct usbdev_ep_s *ep);
/* Get the frame number from the last SOF */
int (*getframe)(FAR struct usbdev_s *dev);
/* Hardware specific features */
int (*wakeup)(FAR struct usbdev_s *dev);
int (*selfpowered)(FAR struct usbdev_s *dev, bool selfpowered);
int (*pullup)(FAR struct usbdev_s *dev, bool enable);
/* Device-specific I/O command support */
int (*ioctl)(FAR struct usbdev_s *dev, unsigned code, unsigned long param);
};
struct usbdev_s
{
const struct usbdev_ops_s *ops; /* Access to hardware specific features */
struct usbdev_ep_s *ep0; /* Endpoint zero */
uint8_t speed; /* Current speed of the host connection */
uint8_t dualspeed:1; /* 1:supports high and full speed operation */
};
/* USB Device Class Implementations *************************************************/
struct usbdevclass_driver_s;
struct usbdevclass_driverops_s
{
int (*bind)(FAR struct usbdevclass_driver_s *driver, FAR struct usbdev_s *dev);
void (*unbind)(FAR struct usbdevclass_driver_s *driver, FAR struct usbdev_s *dev);
int (*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);
void (*disconnect)(FAR struct usbdevclass_driver_s *driver,
FAR struct usbdev_s *dev);
void (*suspend)(FAR struct usbdevclass_driver_s *driver, FAR struct usbdev_s *dev);
void (*resume)(FAR struct usbdevclass_driver_s *driver, FAR struct usbdev_s *dev);
};
struct usbdevclass_driver_s
{
const struct usbdevclass_driverops_s *ops;
uint8_t speed; /* Highest speed that the driver handles */
};
/************************************************************************************
* Public Data
************************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
# define EXTERN extern "C"
extern "C"
{
#else
# define EXTERN extern
#endif
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: usbdevclass_register
*
* Description:
* Register a USB device class driver. The class driver's bind() method will be
* called to bind it to a USB device driver.
*
************************************************************************************/
int usbdev_register(FAR struct usbdevclass_driver_s *driver);
/************************************************************************************
* Name: usbdev_unregister
*
* Description:
* Un-register usbdev class driver.If the USB device is connected to a USB host,
* it will first disconnect(). The driver is also requested to unbind() and clean
* up any device state, before this procedure finally returns.
*
************************************************************************************/
int usbdev_unregister(FAR struct usbdevclass_driver_s *driver);
/****************************************************************************
* Name: usbdev_dma_alloc and usbdev_dma_free
*
* Description:
* The USB class driver allocates packet I/O buffers for data transfer by
* calling the driver allocbuffer() and freebuffer() methods. Those
* methods are only available if CONFIG_USBDEV_DMA is defined in the
* system configuration.
*
* If CONFIG_USBDEV_DMAMEMORY is also defined in the NuttX configuration,
* then the driver implementations of the allocbuffer() and freebuffer()
* methods may use board-specific usbdev_dma_alloc() and usbdev_dma_free().
* If CONFIG_USBDEV_DMA and CONFIG_USBDEV_DMAMEMORY are both defined,
* then the board-specific logic must provide the functions
* usbdev_dma_alloc() and usbdev_dma_free() as prototyped below:
* usbdev_dma_alloc() will allocate DMA-capable memory of the specified
* size; usbdev_dma_free() is the corresponding function that will be
* called to free the DMA-capable memory.
*
* This functions may be simple wrappers around gran_alloc() and
* gran_free() (See nuttx/mm/gran.h). Note that the gran_free() function
* does require the size of the allocation to be freed; that would need
* to be managed in the board-specific logic.
*
****************************************************************************/
#if defined(CONFIG_USBDEV_DMA) && defined(CONFIG_USBDEV_DMAMEMORY)
FAR void *usbdev_dma_alloc(size_t size);
void usbdev_dma_free(FAR void *memory);
#endif
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __INCLUDE_NUTTX_USB_USBDEV_H */
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