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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* usbhid-dump - interface
*
* Copyright (C) 2010 Nikolai Kondrashov <spbnick@gmail.com>
*/
#include "config.h"
#include "iface.h"
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
bool
uhd_iface_valid(const uhd_iface *iface)
{
return iface != NULL &&
uhd_dev_valid(iface->dev) &&
iface->number < UINT8_MAX &&
strlen(iface->addr_str) == (sizeof(iface->addr_str) - 1);
}
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)
{
uhd_iface *iface;
libusb_device *lusb_dev;
int rc;
iface = malloc(sizeof(*iface));
if (iface == NULL)
return NULL;
iface->next = NULL;
iface->dev = dev;
iface->number = number;
iface->int_in_ep_addr = int_in_ep_addr;
iface->int_in_ep_maxp = int_in_ep_maxp;
iface->rd_len = rd_len;
iface->detached = false;
iface->claimed = false;
iface->submitted = false;
/* Format address string */
lusb_dev = libusb_get_device(dev->handle);
rc = snprintf(iface->addr_str, sizeof(iface->addr_str),
"%.3hhu:%.3hhu:%.3hhu",
libusb_get_bus_number(lusb_dev),
libusb_get_device_address(lusb_dev),
number);
(void)rc;
assert(rc == (sizeof(iface->addr_str) - 1));
assert(uhd_iface_valid(iface));
return iface;
}
void
uhd_iface_free(uhd_iface *iface)
{
if (iface == NULL)
return;
assert(uhd_iface_valid(iface));
free(iface);
}
enum libusb_error
uhd_iface_detach(uhd_iface *iface)
{
enum libusb_error err;
assert(uhd_iface_valid(iface));
err = libusb_detach_kernel_driver(iface->dev->handle, iface->number);
if (err == LIBUSB_SUCCESS)
iface->detached = true;
else if (err != LIBUSB_ERROR_NOT_FOUND)
return err;
return LIBUSB_SUCCESS;
}
enum libusb_error
uhd_iface_attach(uhd_iface *iface)
{
enum libusb_error err;
assert(uhd_iface_valid(iface));
if (iface->detached)
{
err = libusb_attach_kernel_driver(iface->dev->handle,
iface->number);
if (err != LIBUSB_SUCCESS)
return err;
iface->detached = false;
}
return LIBUSB_SUCCESS;
}
enum libusb_error
uhd_iface_claim(uhd_iface *iface)
{
enum libusb_error err;
assert(uhd_iface_valid(iface));
err = libusb_claim_interface(iface->dev->handle, iface->number);
if (err != LIBUSB_SUCCESS)
return err;
iface->claimed = true;
return LIBUSB_SUCCESS;
}
enum libusb_error
uhd_iface_release(uhd_iface *iface)
{
enum libusb_error err;
assert(uhd_iface_valid(iface));
err = libusb_release_interface(iface->dev->handle, iface->number);
if (err != LIBUSB_SUCCESS)
return err;
iface->claimed = false;
return LIBUSB_SUCCESS;
}
enum libusb_error
uhd_iface_clear_halt(uhd_iface *iface)
{
enum libusb_error err;
assert(uhd_iface_valid(iface));
err = libusb_clear_halt(iface->dev->handle, iface->int_in_ep_addr);
if (err != LIBUSB_SUCCESS)
return err;
return LIBUSB_SUCCESS;
}
enum libusb_error
uhd_iface_set_idle(const uhd_iface *iface,
uint8_t duration,
unsigned int timeout)
{
int rc;
assert(uhd_iface_valid(iface));
rc = libusb_control_transfer(iface->dev->handle,
/* host->device, class, interface */
0x21,
/* Set_Idle */
0x0A,
/* duration for all report IDs */
duration << 8,
/* interface */
iface->number,
NULL, 0,
timeout);
/*
* Ignoring EPIPE, which means a STALL handshake, which is OK on
* control pipes and indicates request is not supported.
* See USB 2.0 spec, 8.4.5 Handshake Packets
*/
if (rc < 0 && rc != LIBUSB_ERROR_PIPE)
return rc;
return LIBUSB_SUCCESS;
}
enum libusb_error
uhd_iface_set_protocol(const uhd_iface *iface,
bool report,
unsigned int timeout)
{
int rc;
assert(uhd_iface_valid(iface));
rc = libusb_control_transfer(iface->dev->handle,
/* host->device, class, interface */
0x21,
/* Set_Protocol */
0x0B,
/* 0 - boot, 1 - report */
report ? 1 : 0,
/* interface */
iface->number,
NULL, 0,
timeout);
/*
* Ignoring EPIPE, which means a STALL handshake, which is OK on
* control pipes and indicates request is not supported.
* See USB 2.0 spec, 8.4.5 Handshake Packets
*/
if (rc < 0 && rc != LIBUSB_ERROR_PIPE)
return rc;
return LIBUSB_SUCCESS;
}
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