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Hamlib/src/usb_port.c

429 wiersze
11 KiB
C
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/*
* Hamlib Interface - USB communication low-level support
* Copyright (c) 2000-2011 by Stephane Fillod
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
/**
* \addtogroup rig_internal
* @{
*/
/**
* \brief USB IO
* \file usb_port.c
*
* doc todo: deal with defined(HAVE_LIBUSB)... quashing the doc process.
*/
#include <hamlib/config.h>
#include <stdlib.h>
#include <string.h> /* String function definitions */
#include <sys/types.h>
#include <hamlib/rig.h>
#ifdef HAVE_LIBUSB_H
# include <libusb.h>
#elif defined HAVE_LIBUSB_1_0_LIBUSB_H
# include <libusb-1.0/libusb.h>
#endif
#include "usb_port.h"
/*
* Compile only if libusb is available
*/
#if defined(HAVE_LIBUSB) && (defined(HAVE_LIBUSB_H) || defined(HAVE_LIBUSB_1_0_LIBUSB_H))
/**
* \brief Find and open USB device
* \param port
* \return usb_handle
*/
static libusb_device_handle *find_and_open_device(const hamlib_port_t *port)
{
libusb_device_handle *udh = NULL;
libusb_device *dev, **devs;
struct libusb_device_descriptor desc;
char string[256];
int i, r;
rig_debug(RIG_DEBUG_VERBOSE, "%s called LIBUSB_API_VERSION=%x\n", __func__,
LIBUSB_API_VERSION);
rig_debug(RIG_DEBUG_VERBOSE,
"%s: looking for device %04x:%04x...\n",
__func__,
port->parm.usb.vid,
port->parm.usb.pid);
r = libusb_get_device_list(NULL, &devs);
if (r < 0)
{
rig_debug(RIG_DEBUG_ERR,
"%s: failed getting usb device list: %s",
__func__,
libusb_error_name(r));
return NULL;
}
for (i = 0; (dev = devs[i]) != NULL; i++)
{
libusb_get_device_descriptor(dev, &desc);
rig_debug(RIG_DEBUG_VERBOSE,
" %04x:%04x\n",
desc.idVendor,
desc.idProduct);
if (desc.idVendor == port->parm.usb.vid
&& desc.idProduct == port->parm.usb.pid)
{
/* we need to open the device in order to query strings */
r = libusb_open(dev, &udh);
if (r < 0)
{
rig_debug(RIG_DEBUG_WARN,
"%s: Warning: Cannot open USB device: %s\n",
__func__,
libusb_error_name(r));
continue;
}
/* now check whether the names match: */
if (port->parm.usb.vendor_name)
{
string[0] = '\0';
r = libusb_get_string_descriptor_ascii(udh,
desc.iManufacturer,
(unsigned char *)string,
sizeof(string));
if (r < 0)
{
rig_debug(RIG_DEBUG_WARN,
"Warning: cannot query manufacturer for USB device: %s\n",
libusb_error_name(r));
libusb_close(udh);
continue;
}
rig_debug(RIG_DEBUG_VERBOSE, " vendor >%s<", string);
if (strcmp(string, port->parm.usb.vendor_name) != 0)
{
rig_debug(RIG_DEBUG_WARN,
"%s: Warning: Vendor name string mismatch!\n",
__func__);
libusb_close(udh);
continue;
}
}
if (port->parm.usb.product)
{
string[0] = '\0';
r = libusb_get_string_descriptor_ascii(udh,
desc.iProduct,
(unsigned char *)string,
sizeof(string));
if (r < 0)
{
rig_debug(RIG_DEBUG_WARN,
"Warning: cannot query product for USB device: %s\n",
libusb_error_name(r));
libusb_close(udh);
continue;
}
rig_debug(RIG_DEBUG_VERBOSE, " product >%s<", string);
if (strcmp(string, port->parm.usb.product) != 0)
{
/* Now testing with strncasecmp() for case insensitive
* match. Updating firmware on FUNcube Dongle to v18f resulted
* in product string changing from "FunCube Dongle" to
* "FUNcube Dongle". As new dongles are shipped with
* older firmware, both product strings are valid. Sigh...
*/
if (strncasecmp(string,
port->parm.usb.product,
sizeof(port->parm.usb.product) - 1) != 0)
{
rig_debug(RIG_DEBUG_WARN,
"%s: Warning: Product string mismatch!\n",
__func__);
libusb_close(udh);
continue;
}
}
}
libusb_free_device_list(devs, 1);
rig_debug(RIG_DEBUG_VERBOSE, "%s", " -> found\n");
return udh;
}
}
libusb_free_device_list(devs, 1);
rig_debug(RIG_DEBUG_VERBOSE, "%s", " -> not found\n");
return NULL; /* not found */
}
/**
* \brief Open hamlib_port of USB device
* \param port
* \return status
*/
int usb_port_open(hamlib_port_t *port)
{
static char pathname[HAMLIB_FILPATHLEN];
libusb_device_handle *udh;
char *p, *q;
int r;
rig_debug(RIG_DEBUG_VERBOSE, "%s called\n", __func__);
/* init default libusb-1.0 library contexte, if needed */
r = libusb_init(NULL);
if (r < 0)
{
rig_debug(RIG_DEBUG_ERR,
"%s: libusb_init failed: %s\n",
__func__,
libusb_error_name(r));
return -RIG_EIO;
}
//libusb_set_debug(NULL, 1);
/* Extract VID/PID/Vendor/Product name from pathname. */
/* Duplicate the string since we may modify it. */
strncpy(pathname, port->pathname, sizeof pathname);
pathname[HAMLIB_FILPATHLEN - 1] = '\0';
p = pathname;
if (strlen(pathname) == 9)
{
// then is new new libusb format with just vid:pid
int n = sscanf(pathname, "%x:%x", &port->parm.usb.vid, &port->parm.usb.pid);
if (n != 2)
{
rig_debug(RIG_DEBUG_ERR, "%s: unable to parse vid:pid from '%s'\n", __func__,
pathname);
return -RIG_EINVAL;
}
}
else
{
q = strchr(p, ':');
if (q)
{
++q;
port->parm.usb.vid = strtol(q, NULL, 16);
p = q;
q = strchr(p, ':');
if (q)
{
++q;
port->parm.usb.pid = strtol(q, NULL, 16);
p = q;
q = strchr(p, ':');
if (q)
{
++q;
port->parm.usb.vendor_name = q;
p = q;
q = strchr(p, ':');
if (q)
{
*q++ = '\0';
port->parm.usb.product = q;
}
}
}
}
}
udh = find_and_open_device(port);
if (udh == 0)
{
libusb_exit(NULL);
return -RIG_EIO;
}
/* Try to detach ftdi_sio kernel module.
* This should be performed only for devices using
* USB-serial converters (like FTDI chips), for other
* devices this may cause problems, so do not do it.
*/
(void)libusb_set_auto_detach_kernel_driver(udh, port->parm.usb.iface);
if (port->parm.usb.iface >= 0)
{
#ifdef _WIN32
/* Is it still needed with libusb-1.0 ? */
if (port->parm.usb.conf >= 0
&& (r = libusb_set_configuration(udh, port->parm.usb.conf)) < 0)
{
rig_debug(RIG_DEBUG_ERR,
"%s: libusb_set_configuration: failed conf %d: %s\n",
__func__,
port->parm.usb.conf,
libusb_error_name(r));
libusb_close(udh);
libusb_exit(NULL);
return -RIG_EIO;
}
#endif
rig_debug(RIG_DEBUG_VERBOSE,
"%s: claiming %d\n",
__func__,
port->parm.usb.iface);
r = libusb_claim_interface(udh, port->parm.usb.iface);
if (r < 0)
{
rig_debug(RIG_DEBUG_ERR,
"%s:libusb_claim_interface: failed interface %d: %s\n",
__func__,
port->parm.usb.iface,
libusb_error_name(r));
libusb_close(udh);
libusb_exit(NULL);
return -RIG_EIO;
}
#if 0
r = libusb_set_interface_alt_setting(udh, port->parm.usb.iface,
port->parm.usb.alt);
if (r < 0)
{
fprintf(stderr,
"%s:usb_set_alt_interface: failed: %s\n",
__func__,
libusb_error_name(r));
libusb_release_interface(udh, port->parm.usb.iface);
libusb_close(udh);
libusb_exit(NULL);
return -RIG_EIO;
}
#endif
}
port->handle = (void *) udh;
return RIG_OK;
}
/**
* \brief Close hamlib_port of USB device
* \param port
* \return status
*/
int usb_port_close(hamlib_port_t *port)
{
libusb_device_handle *udh = port->handle;
rig_debug(RIG_DEBUG_VERBOSE, "%s called\n", __func__);
libusb_release_interface(udh, port->parm.usb.iface);
libusb_close(udh);
libusb_exit(NULL);
return RIG_OK;
}
#else
//! @cond Doxygen_Suppress
int usb_port_open(hamlib_port_t *port)
{
rig_debug(RIG_DEBUG_VERBOSE, "%s called\n", __func__);
return -RIG_ENAVAIL;
}
//! @endcond
//! @cond Doxygen_Suppress
int usb_port_close(hamlib_port_t *port)
{
rig_debug(RIG_DEBUG_VERBOSE, "%s called\n", __func__);
return -RIG_ENAVAIL;
}
//! @endcond
#endif /* defined(HAVE_LIBUSB) && defined(HAVE_LIBUSB_H) */
/** @} */
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