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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* usbhid-dump - interface
*
* Copyright (C) 2010 Nikolai Kondrashov <spbnick@gmail.com>
*/
#ifndef __UHD_IFACE_H__
#define __UHD_IFACE_H__
#include <stdint.h>
#include "dev.h"
#ifdef __cplusplus
extern "C" {
#endif
/** usbhid-dump interface */
typedef struct uhd_iface uhd_iface;
struct uhd_iface {
uhd_iface *next;
const uhd_dev *dev; /**< Device */
uint8_t number; /**< Interface number */
char addr_str[12]; /**< Address string */
uint8_t int_in_ep_addr; /**< Interrupt IN EP address */
uint16_t int_in_ep_maxp; /**< Interrupt IN EP maximum
packet size */
uint16_t rd_len; /**< Report descriptor length */
bool detached; /**< True if the interface was
detached from the kernel
driver, false otherwise */
bool claimed; /**< True if the interface was
claimed */
/*
* This is somewhat hackish and doesn't belong here, since theoretically
* there could be more than one transfer submitted for an interface.
* However, we don't do it yet. This flag is used to track transfer
* cancellation during stream dumping.
*/
bool submitted; /**< True if an asynchronous
transfer has been submitted
for the interface */
};
/**
* Check if an interface is valid.
*
* @param iface Interface.
*
* @return True if the interface is valid, false otherwise.
*/
extern bool uhd_iface_valid(const uhd_iface *iface);
/**
* Create a new interface.
*
* @param handle Device handle.
* @param number Interface number.
* @param int_in_ep_addr Interrupt in endpoint address.
* @param int_in_ep_maxp Interrupt in endpoint maximum packet size.
* @param rd_len Report descriptor length.
*
* @return New interface or NULL, if failed to allocate.
*/
extern uhd_iface *uhd_iface_new(const uhd_dev *dev,
uint8_t number,
uint8_t int_in_ep_addr,
uint16_t int_in_ep_maxp,
uint16_t rd_len);
/**
* Free an interface.
*
* @param iface The interface to free, could be NULL.
*/
extern void uhd_iface_free(uhd_iface *iface);
/**
* Detach an interface from its kernel driver (if any).
*
* @param iface The interface to detach.
*
* @return Libusb error code.
*/
extern enum libusb_error uhd_iface_detach(uhd_iface *iface);
/**
* Attach an interface to its kernel driver (if detached before).
*
* @param iface The interface to attach.
*
* @return Libusb error code.
*/
extern enum libusb_error uhd_iface_attach(uhd_iface *iface);
/**
* Claim an interface.
*
* @param iface The interface to claim.
*
* @return Libusb error code.
*/
extern enum libusb_error uhd_iface_claim(uhd_iface *iface);
/**
* Set idle duration on an interface; ignore errors indicating missing
* support.
*
* @param iface The interface to set idle duration on.
* @param duration The duration in 4 ms steps starting from 4 ms.
* @param timeout The request timeout, ms.
*
* @return Libusb error code.
*/
extern enum libusb_error uhd_iface_set_idle(
const uhd_iface *iface,
uint8_t duration,
unsigned int timeout);
/**
* Set HID protocol on an interface; ignore errors indicating missing
* support.
*
* @param iface The interface to set idle duration on.
* @param report True for "report" protocol, false for "boot" protocol.
* @param timeout The request timeout, ms.
*
* @return Libusb error code.
*/
extern enum libusb_error uhd_iface_set_protocol(
const uhd_iface *iface,
bool report,
unsigned int timeout);
/**
* Clear halt condition on the input interrupt endpoint of an interface.
*
* @param iface The interface to clear halt condition on.
*
* @return Libusb error code.
*/
extern enum libusb_error uhd_iface_clear_halt(uhd_iface *iface);
/**
* Release an interface (if claimed before).
*
* @param iface The interface to release.
*
* @return Libusb error code.
*/
extern enum libusb_error uhd_iface_release(uhd_iface *iface);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* __UHD_IFACE_H__ */
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