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[Patch-gnuradio] [PATCH 1/4] usrp: libusb-1.0 usrp


From: Thomas Tsou
Subject: [Patch-gnuradio] [PATCH 1/4] usrp: libusb-1.0 usrp
Date: Mon, 17 Aug 2009 20:49:02 -0400

Mostly API associated device and handle name changes

---
 usrp/host/include/usrp/usrp_basic.h |   20 +-
 usrp/host/include/usrp/usrp_prims.h |   90 +++++-----
 usrp/host/lib/usrp_basic.cc         |   42 ++---
 usrp/host/lib/usrp_prims.cc         |  310 +++++++++++++++++------------------
 usrp/host/swig/usrp_prims.i         |   78 +++++-----
 5 files changed, 260 insertions(+), 280 deletions(-)

diff --git a/usrp/host/include/usrp/usrp_basic.h 
b/usrp/host/include/usrp/usrp_basic.h
index fbbf49d..c79908a 100644
--- a/usrp/host/include/usrp/usrp_basic.h
+++ b/usrp/host/include/usrp/usrp_basic.h
@@ -46,7 +46,7 @@
 #include <boost/utility.hpp>
 #include <usrp/usrp_subdev_spec.h>
 
-struct usb_dev_handle;
+struct libusb_device_handle;
 class  fusb_devhandle;
 class  fusb_ephandle;
 
@@ -65,16 +65,16 @@ protected:
   void shutdown_daughterboards();
 
 protected:
-  struct usb_dev_handle        *d_udh;
-  int                   d_usb_data_rate;       // bytes/sec
-  int                   d_bytes_per_poll;      // how often to poll for 
overruns
-  bool                  d_verbose;
-  long                   d_fpga_master_clock_freq;
+  struct libusb_device_handle  *d_udh;
+  int                           d_usb_data_rate;       // bytes/sec
+  int                           d_bytes_per_poll;      // how often to poll 
for overruns
+  bool                          d_verbose;
+  long                          d_fpga_master_clock_freq;
 
-  static const int      MAX_REGS = 128;
-  unsigned int          d_fpga_shadows[MAX_REGS];
+  static const int              MAX_REGS = 128;
+  unsigned int                  d_fpga_shadows[MAX_REGS];
 
-  int                   d_dbid[2];             // daughterboard ID's (side A, 
side B)
+  int                           d_dbid[2];             // daughterboard ID's 
(side A, side B)
 
   /*!
    * Shared pointers to subclasses of db_base.
@@ -91,7 +91,7 @@ protected:
 
 
   usrp_basic (int which_board,
-             struct usb_dev_handle *open_interface (struct usb_device *dev),
+             struct libusb_device_handle *open_interface (struct libusb_device 
*dev),
              const std::string fpga_filename = "",
              const std::string firmware_filename = "");
 
diff --git a/usrp/host/include/usrp/usrp_prims.h 
b/usrp/host/include/usrp/usrp_prims.h
index aa08870..df410b4 100644
--- a/usrp/host/include/usrp/usrp_prims.h
+++ b/usrp/host/include/usrp/usrp_prims.h
@@ -41,8 +41,8 @@ static const int USRP_HASH_SIZE = 16;
 
 enum usrp_load_status_t { ULS_ERROR = 0, ULS_OK, ULS_ALREADY_LOADED };
 
-struct usb_dev_handle;
-struct usb_device;
+struct libusb_device_handle;
+struct libusb_device;
 
 /*!
  * \brief initialize libusb; probe busses and devices.
@@ -65,21 +65,21 @@ void usrp_rescan ();
  *   configured USRP (firmware loaded)
  *   unconfigured Cypress FX2 (only if fx2_ok_p is true)
  */
-struct usb_device *usrp_find_device (int nth, bool fx2_ok_p = false);
+struct libusb_device *usrp_find_device (int nth, bool fx2_ok_p = false);
 
-bool usrp_usrp_p (struct usb_device *q);               //< is this a USRP
-bool usrp_usrp0_p (struct usb_device *q);              //< is this a USRP Rev 0
-bool usrp_usrp1_p (struct usb_device *q);              //< is this a USRP Rev 1
-bool usrp_usrp2_p (struct usb_device *q);              //< is this a USRP Rev 2
-int  usrp_hw_rev (struct usb_device *q);               //< return h/w rev code
+bool usrp_usrp_p (struct libusb_device *q);            //< is this a USRP
+bool usrp_usrp0_p (struct libusb_device *q);           //< is this a USRP Rev 0
+bool usrp_usrp1_p (struct libusb_device *q);           //< is this a USRP Rev 1
+bool usrp_usrp2_p (struct libusb_device *q);           //< is this a USRP Rev 2
+int  usrp_hw_rev (struct libusb_device *q);            //< return h/w rev code
 
-bool usrp_fx2_p (struct usb_device *q);                        //< is this an 
unconfigured Cypress FX2
+bool usrp_fx2_p (struct libusb_device *q);                     //< is this an 
unconfigured Cypress FX2
 
-bool usrp_unconfigured_usrp_p (struct usb_device *q);  //< some kind of 
unconfigured USRP
-bool usrp_configured_usrp_p (struct usb_device *q);    //< some kind of 
configured USRP
+bool usrp_unconfigured_usrp_p (struct libusb_device *q);       //< some kind 
of unconfigured USRP
+bool usrp_configured_usrp_p (struct libusb_device *q); //< some kind of 
configured USRP
 
 /*!
- * \brief given a usb_device return an instance of the appropriate 
usb_dev_handle
+ * \brief given a libusb_device return an instance of the appropriate 
libusb_device_handle
  *
  * These routines claim the specified interface and select the
  * correct alternate interface.  (USB nomenclature is totally screwed!)
@@ -87,14 +87,14 @@ bool usrp_configured_usrp_p (struct usb_device *q); //< 
some kind of configured
  * If interface can't be opened, or is already claimed by some other
  * process, 0 is returned.
  */
-struct usb_dev_handle *usrp_open_cmd_interface (struct usb_device *dev);
-struct usb_dev_handle *usrp_open_rx_interface (struct usb_device *dev);
-struct usb_dev_handle *usrp_open_tx_interface (struct usb_device *dev);
+struct libusb_device_handle *usrp_open_cmd_interface (struct libusb_device 
*dev);
+struct libusb_device_handle *usrp_open_rx_interface (struct libusb_device 
*dev);
+struct libusb_device_handle *usrp_open_tx_interface (struct libusb_device 
*dev);
 
 /*!
  * \brief close interface.
  */
-bool usrp_close_interface (struct usb_dev_handle *udh);
+bool usrp_close_interface (struct libusb_device_handle *udh);
 
 /*!
  * \brief load intel hex format file into USRP/Cypress FX2 (8051).
@@ -106,7 +106,7 @@ bool usrp_close_interface (struct usb_dev_handle *udh);
  */
 
 usrp_load_status_t 
-usrp_load_firmware (struct usb_dev_handle *udh, const char *filename, bool 
force);
+usrp_load_firmware (struct libusb_device_handle *udh, const char *filename, 
bool force);
 
 /*!
  * \brief load intel hex format file into USRP FX2 (8051).
@@ -125,7 +125,7 @@ usrp_load_firmware_nth (int nth, const char *filename, bool 
force);
  * \brief load fpga configuration bitstream
  */
 usrp_load_status_t
-usrp_load_fpga (struct usb_dev_handle *udh, const char *filename, bool force);
+usrp_load_fpga (struct libusb_device_handle *udh, const char *filename, bool 
force);
 
 /*!
  * \brief load the regular firmware and fpga bitstream in the Nth USRP.
@@ -140,54 +140,54 @@ bool usrp_load_standard_bits (int nth, bool force,
  * \brief copy the given \p hash into the USRP hash slot \p which.
  * The usrp implements two hash slots, 0 and 1.
  */
-bool usrp_set_hash (struct usb_dev_handle *udh, int which,
+bool usrp_set_hash (struct libusb_device_handle *udh, int which,
                    const unsigned char hash[USRP_HASH_SIZE]);
 
 /*!
  * \brief retrieve the \p hash from the USRP hash slot \p which.
  * The usrp implements two hash slots, 0 and 1.
  */
-bool usrp_get_hash (struct usb_dev_handle *udh, int which,
+bool usrp_get_hash (struct libusb_device_handle *udh, int which,
                    unsigned char hash[USRP_HASH_SIZE]);
 
-bool usrp_write_fpga_reg (struct usb_dev_handle *udh, int reg, int value);
-bool usrp_read_fpga_reg (struct usb_dev_handle *udh, int reg, int *value);
-bool usrp_set_fpga_reset (struct usb_dev_handle *udh, bool on);
-bool usrp_set_fpga_tx_enable (struct usb_dev_handle *udh, bool on);
-bool usrp_set_fpga_rx_enable (struct usb_dev_handle *udh, bool on);
-bool usrp_set_fpga_tx_reset (struct usb_dev_handle *udh, bool on);
-bool usrp_set_fpga_rx_reset (struct usb_dev_handle *udh, bool on);
-bool usrp_set_led (struct usb_dev_handle *udh, int which, bool on);
+bool usrp_write_fpga_reg (struct libusb_device_handle *udh, int reg, int 
value);
+bool usrp_read_fpga_reg (struct libusb_device_handle *udh, int reg, int 
*value);
+bool usrp_set_fpga_reset (struct libusb_device_handle *udh, bool on);
+bool usrp_set_fpga_tx_enable (struct libusb_device_handle *udh, bool on);
+bool usrp_set_fpga_rx_enable (struct libusb_device_handle *udh, bool on);
+bool usrp_set_fpga_tx_reset (struct libusb_device_handle *udh, bool on);
+bool usrp_set_fpga_rx_reset (struct libusb_device_handle *udh, bool on);
+bool usrp_set_led (struct libusb_device_handle *udh, int which, bool on);
 
-bool usrp_check_rx_overrun (struct usb_dev_handle *udh, bool *overrun_p);
-bool usrp_check_tx_underrun (struct usb_dev_handle *udh, bool *underrun_p);
+bool usrp_check_rx_overrun (struct libusb_device_handle *udh, bool *overrun_p);
+bool usrp_check_tx_underrun (struct libusb_device_handle *udh, bool 
*underrun_p);
 
 // i2c_read and i2c_write are limited to a maximum len of 64 bytes.
 
-bool usrp_i2c_write (struct usb_dev_handle *udh, int i2c_addr,
+bool usrp_i2c_write (struct libusb_device_handle *udh, int i2c_addr,
                     const void *buf, int len);
 
-bool usrp_i2c_read (struct usb_dev_handle *udh, int i2c_addr,
+bool usrp_i2c_read (struct libusb_device_handle *udh, int i2c_addr,
                    void *buf, int len);
 
 // spi_read and spi_write are limited to a maximum of 64 bytes
 // See usrp_spi_defs.h for more info
 
-bool usrp_spi_write (struct usb_dev_handle *udh,
+bool usrp_spi_write (struct libusb_device_handle *udh,
                     int optional_header, int enables, int format,
                     const void *buf, int len);
 
-bool usrp_spi_read (struct usb_dev_handle *udh,
+bool usrp_spi_read (struct libusb_device_handle *udh,
                     int optional_header, int enables, int format,
                     void *buf, int len);
 
 
-bool usrp_9862_write (struct usb_dev_handle *udh,
+bool usrp_9862_write (struct libusb_device_handle *udh,
                      int which_codec,                  // [0,  1]
                      int regno,                        // [0, 63]
                      int value);                       // [0, 255]     
 
-bool usrp_9862_read (struct usb_dev_handle *udh,
+bool usrp_9862_read (struct libusb_device_handle *udh,
                     int which_codec,                   // [0,  1]
                     int regno,                         // [0, 63]
                     unsigned char *value);             // [0, 255]
@@ -198,28 +198,28 @@ bool usrp_9862_read (struct usb_dev_handle *udh,
  * \p buf contains alternating register_number, register_value pairs.
  * \p len must be even and is the length of buf in bytes.
  */
-bool usrp_9862_write_many (struct usb_dev_handle *udh, int which_codec,
+bool usrp_9862_write_many (struct libusb_device_handle *udh, int which_codec,
                           const unsigned char *buf, int len);
                           
 
 /*!
  * \brief write specified regs to all 9862's in the system
  */
-bool usrp_9862_write_many_all (struct usb_dev_handle *udh,
+bool usrp_9862_write_many_all (struct libusb_device_handle *udh,
                               const unsigned char *buf, int len);
                           
 
 // Write 24LC024 / 24LC025 EEPROM on motherboard or daughterboard.
 // Which EEPROM is determined by i2c_addr.  See i2c_addr.h
 
-bool usrp_eeprom_write (struct usb_dev_handle *udh, int i2c_addr,
+bool usrp_eeprom_write (struct libusb_device_handle *udh, int i2c_addr,
                        int eeprom_offset, const void *buf, int len);
 
 
 // Read 24LC024 / 24LC025 EEPROM on motherboard or daughterboard.
 // Which EEPROM is determined by i2c_addr.  See i2c_addr.h
 
-bool usrp_eeprom_read (struct usb_dev_handle *udh, int i2c_addr,
+bool usrp_eeprom_read (struct libusb_device_handle *udh, int i2c_addr,
                       int eeprom_offset, void *buf, int len);
 
 
@@ -241,7 +241,7 @@ bool usrp_eeprom_read (struct usb_dev_handle *udh, int 
i2c_addr,
  * binary values.  Although dacs 0, 1 and 2 are 8-bit and dac 3 is 12-bit,
  * the interface is in terms of 12-bit values [0,4095]
  */
-bool usrp_write_aux_dac (struct usb_dev_handle *uhd, int slot,
+bool usrp_write_aux_dac (struct libusb_device_handle *uhd, int slot,
                         int which_dac, int value);
 
 /*!
@@ -251,7 +251,7 @@ bool usrp_write_aux_dac (struct usb_dev_handle *uhd, int 
slot,
  * \p which_adc: [0,1]  which of the two adcs to read
  * \p *value: return value, 12-bit straight binary.
  */
-bool usrp_read_aux_adc (struct usb_dev_handle *udh, int slot,
+bool usrp_read_aux_adc (struct libusb_device_handle *udh, int slot,
                        int which_adc, int *value);
 
 
@@ -274,13 +274,13 @@ struct usrp_dboard_eeprom {
  * \brief Read and return parsed daughterboard eeprom
  */
 usrp_dbeeprom_status_t
-usrp_read_dboard_eeprom (struct usb_dev_handle *udh,
+usrp_read_dboard_eeprom (struct libusb_device_handle *udh,
                         int slot_id, usrp_dboard_eeprom *eeprom);
 
 /*!
  * \brief write ADC/DAC offset calibration constants to d'board eeprom
  */
-bool usrp_write_dboard_offsets (struct usb_dev_handle *udh, int slot_id,
+bool usrp_write_dboard_offsets (struct libusb_device_handle *udh, int slot_id,
                                short offset0, short offset1);
 
 /*!
@@ -289,6 +289,6 @@ bool usrp_write_dboard_offsets (struct usb_dev_handle *udh, 
int slot_id,
  * Note that this only works on a configured usrp.
  * \returns non-zero length string iff successful.
  */
-std::string usrp_serial_number(struct usb_dev_handle *udh);
+std::string usrp_serial_number(struct libusb_device_handle *udh);
 
 #endif /* _USRP_PRIMS_H_ */
diff --git a/usrp/host/lib/usrp_basic.cc b/usrp/host/lib/usrp_basic.cc
index 4f3df52..a8b44ed 100644
--- a/usrp/host/lib/usrp_basic.cc
+++ b/usrp/host/lib/usrp_basic.cc
@@ -31,7 +31,7 @@
 #include "fpga_regs_standard.h"
 #include "fusb.h"
 #include "db_boards.h"
-#include <usb.h>
+#include <libusb-1.0/libusb.h>
 #include <stdexcept>
 #include <assert.h>
 #include <math.h>
@@ -55,24 +55,22 @@ static const double POLLING_INTERVAL = 0.1; // seconds
 
 ////////////////////////////////////////////////////////////////
 
-static struct usb_dev_handle *
-open_rx_interface (struct usb_device *dev)
+static struct libusb_device_handle *
+open_rx_interface (struct libusb_device *dev)
 {
-  struct usb_dev_handle *udh = usrp_open_rx_interface (dev);
+  struct libusb_device_handle *udh = usrp_open_rx_interface (dev);
   if (udh == 0){
     fprintf (stderr, "usrp_basic_rx: can't open rx interface\n");
-    usb_strerror ();
   }
   return udh;
 }
 
-static struct usb_dev_handle *
-open_tx_interface (struct usb_device *dev)
+static struct libusb_device_handle *
+open_tx_interface (struct libusb_device *dev)
 {
-  struct usb_dev_handle *udh = usrp_open_tx_interface (dev);
+  struct libusb_device_handle *udh = usrp_open_tx_interface (dev);
   if (udh == 0){
     fprintf (stderr, "usrp_basic_tx: can't open tx interface\n");
-    usb_strerror ();
   }
   return udh;
 }
@@ -106,8 +104,8 @@ static unsigned char common_regs[] = {
 
 
 usrp_basic::usrp_basic (int which_board, 
-                       struct usb_dev_handle *
-                       open_interface (struct usb_device *dev),
+                       struct libusb_device_handle *
+                       open_interface (struct libusb_device *dev),
                        const std::string fpga_filename,
                        const std::string firmware_filename)
   : d_udh (0),
@@ -132,7 +130,7 @@ usrp_basic::usrp_basic (int which_board,
   if (!usrp_load_standard_bits (which_board, false, fpga_filename, 
firmware_filename))
     throw std::runtime_error ("usrp_basic/usrp_load_standard_bits");
 
-  struct usb_device *dev = usrp_find_device (which_board);
+  struct libusb_device *dev = usrp_find_device (which_board);
   if (dev == 0){
     fprintf (stderr, "usrp_basic: can't find usrp[%d]\n", which_board);
     throw std::runtime_error ("usrp_basic/usrp_find_device");
@@ -175,7 +173,14 @@ usrp_basic::~usrp_basic ()
   d_db.resize(0); // forget db shared ptrs
 
   if (d_udh)
-    usb_close (d_udh);
+    libusb_close (d_udh);
+
+  // There's no reference count on the number of times libusb is initialized.
+  // libusb_init can be called multiple times, but libusb_exit shuts down
+  // everything. Leave libusb running for now. Need to add a count so that it
+  // exits nicely. 
+
+  //libusb_exit (NULL);
 }
 
 void
@@ -834,7 +839,6 @@ usrp_basic_rx::~usrp_basic_rx ()
 {
   if (!set_rx_enable (false)){
     fprintf (stderr, "usrp_basic_rx: set_fpga_rx_enable failed\n");
-    usb_strerror ();
   }
 
   d_ephandle->stop ();
@@ -859,13 +863,11 @@ usrp_basic_rx::start ()
 
   if (!d_ephandle->start ()){
     fprintf (stderr, "usrp_basic_rx: failed to start end point streaming");
-    usb_strerror ();
     return false;
   }
 
   if (!set_rx_enable (true)){
     fprintf (stderr, "usrp_basic_rx: set_rx_enable failed\n");
-    usb_strerror ();
     return false;
   }
   
@@ -879,13 +881,11 @@ usrp_basic_rx::stop ()
 
   if (!set_rx_enable(false)){
     fprintf (stderr, "usrp_basic_rx: set_rx_enable(false) failed\n");
-    usb_strerror ();
     ok = false;
   }
 
   if (!d_ephandle->stop()){
     fprintf (stderr, "usrp_basic_rx: failed to stop end point streaming");
-    usb_strerror ();
     ok = false;
   }
 
@@ -959,7 +959,6 @@ usrp_basic_rx::read (void *buf, int len, bool *overrun)
     d_bytes_seen = 0;
     if (!usrp_check_rx_overrun (d_udh, overrun)){
       fprintf (stderr, "usrp_basic_rx: usrp_check_rx_overrun failed\n");
-      usb_strerror ();
     }
   }
     
@@ -1264,13 +1263,11 @@ usrp_basic_tx::start ()
 
   if (!set_tx_enable (true)){
     fprintf (stderr, "usrp_basic_tx: set_tx_enable failed\n");
-    usb_strerror ();
     return false;
   }
   
   if (!d_ephandle->start ()){
     fprintf (stderr, "usrp_basic_tx: failed to start end point streaming");
-    usb_strerror ();
     return false;
   }
 
@@ -1284,13 +1281,11 @@ usrp_basic_tx::stop ()
 
   if (!d_ephandle->stop ()){
     fprintf (stderr, "usrp_basic_tx: failed to stop end point streaming");
-    usb_strerror ();
     ok = false;
   }
 
   if (!set_tx_enable (false)){
     fprintf (stderr, "usrp_basic_tx: set_tx_enable(false) failed\n");
-    usb_strerror ();
     ok = false;
   }
 
@@ -1364,7 +1359,6 @@ usrp_basic_tx::write (const void *buf, int len, bool 
*underrun)
     d_bytes_seen = 0;
     if (!usrp_check_tx_underrun (d_udh, underrun)){
       fprintf (stderr, "usrp_basic_tx: usrp_check_tx_underrun failed\n");
-      usb_strerror ();
     }
   }
 
diff --git a/usrp/host/lib/usrp_prims.cc b/usrp/host/lib/usrp_prims.cc
index 3d87d24..e1e3e30 100644
--- a/usrp/host/lib/usrp_prims.cc
+++ b/usrp/host/lib/usrp_prims.cc
@@ -30,7 +30,7 @@
 #include "usrp_i2c_addr.h"
 #include "fpga_regs_common.h"
 #include "fpga_regs_standard.h"
-#include <usb.h>
+#include <libusb-1.0/libusb.h>
 #include <errno.h>
 #include <stdio.h>
 #include <unistd.h>
@@ -101,7 +101,7 @@ get_proto_filename(const std::string user_filename, const 
char *env_var, const c
 }
 
 
-static void power_down_9862s (struct usb_dev_handle *udh);
+static void power_down_9862s (struct libusb_device_handle *udh);
 
 void
 usrp_one_time_init ()
@@ -110,35 +110,14 @@ usrp_one_time_init ()
 
   if (first){
     first = false;
-    usb_init ();                       // usb library init
-    usb_find_busses ();
-    usb_find_devices ();
+    libusb_init (NULL);                        // usb library init
   }
 }
 
 void
 usrp_rescan ()
 {
-  usb_find_busses ();
-  usb_find_devices ();
-}
-
-
-// ----------------------------------------------------------------
-// Danger, big, fragile KLUDGE.  The problem is that we want to be
-// able to get from a usb_dev_handle back to a usb_device, and the
-// right way to do this is buried in a non-installed include file.
-
-static struct usb_device *
-dev_handle_to_dev (usb_dev_handle *udh)
-{
-  struct usb_dev_handle_kludge {
-    int                         fd;
-    struct usb_bus     *bus;
-    struct usb_device  *device;
-  };
-
-  return ((struct usb_dev_handle_kludge *) udh)->device;
+  // deprecated?
 }
 
 // ----------------------------------------------------------------
@@ -147,171 +126,176 @@ dev_handle_to_dev (usb_dev_handle *udh)
  * q must be a real USRP, not an FX2.  Return its hardware rev number.
  */
 int
-usrp_hw_rev (struct usb_device *q)
+usrp_hw_rev (struct libusb_device *q)
 {
-  return q->descriptor.bcdDevice & 0x00FF;
+  struct libusb_device_descriptor desc;
+  if (libusb_get_device_descriptor(q, &desc) < 0)
+    fprintf (stderr, "usrp: libusb_get_device_descriptor failed\n");
+
+  return desc.bcdDevice & 0x00FF;
 }
 
 /*
  * q must be a real USRP, not an FX2.  Return true if it's configured.
  */
 static bool
-_usrp_configured_p (struct usb_device *q)
+_usrp_configured_p (struct libusb_device *q)
 {
-  return (q->descriptor.bcdDevice & 0xFF00) != 0;
+  struct libusb_device_descriptor desc;
+  if (libusb_get_device_descriptor(q, &desc) < 0)
+    fprintf (stderr, "usrp: libusb_get_device_descriptor failed\n");
+
+  return (desc.bcdDevice & 0xFF00) != 0;
 }
 
 bool
-usrp_usrp_p (struct usb_device *q)
+usrp_usrp_p (struct libusb_device *q)
 {
-  return (q->descriptor.idVendor == USB_VID_FSF
-         && q->descriptor.idProduct == USB_PID_FSF_USRP);
+  struct libusb_device_descriptor desc;
+  if (libusb_get_device_descriptor(q, &desc) < 0)
+    fprintf (stderr, "usrp: libusb_get_device_descriptor failed\n");
+
+  return (desc.idVendor == USB_VID_FSF
+         && desc.idProduct == USB_PID_FSF_USRP);
 }
 
 bool
-usrp_fx2_p (struct usb_device *q)
+usrp_fx2_p (struct libusb_device *q)
 {
-  return (q->descriptor.idVendor == USB_VID_CYPRESS
-         && q->descriptor.idProduct == USB_PID_CYPRESS_FX2);
+  struct libusb_device_descriptor desc;
+  if (libusb_get_device_descriptor(q, &desc) < 0)
+    fprintf (stderr, "usrp: libusb_get_device_descriptor failed\n");
+
+  return (desc.idVendor == USB_VID_CYPRESS
+         && desc.idProduct == USB_PID_CYPRESS_FX2);
 }
 
 bool
-usrp_usrp0_p (struct usb_device *q)
+usrp_usrp0_p (struct libusb_device *q)
 {
   return usrp_usrp_p (q) && usrp_hw_rev (q) == 0;
 }
 
 bool
-usrp_usrp1_p (struct usb_device *q)
+usrp_usrp1_p (struct libusb_device *q)
 {
   return usrp_usrp_p (q) && usrp_hw_rev (q) == 1;
 }
 
 bool
-usrp_usrp2_p (struct usb_device *q)
+usrp_usrp2_p (struct libusb_device *q)
 {
   return usrp_usrp_p (q) && usrp_hw_rev (q) == 2;
 }
 
 
 bool
-usrp_unconfigured_usrp_p (struct usb_device *q)
+usrp_unconfigured_usrp_p (struct libusb_device *q)
 {
   return usrp_usrp_p (q) && !_usrp_configured_p (q);
 }
 
 bool
-usrp_configured_usrp_p (struct usb_device *q)
+usrp_configured_usrp_p (struct libusb_device *q)
 {
   return usrp_usrp_p (q) && _usrp_configured_p (q);
 }
 
 // ----------------------------------------------------------------
 
-struct usb_device *
+struct libusb_device *
 usrp_find_device (int nth, bool fx2_ok_p)
 {
-  struct usb_bus *p;
-  struct usb_device *q;
+  libusb_device **list;
+
+  struct libusb_device *q;
   int   n_found = 0;
 
   usrp_one_time_init ();
-  
-  p = usb_get_busses();
-  while (p != NULL){
-    q = p->devices;
-    while (q != NULL){
-      if (usrp_usrp_p (q) || (fx2_ok_p && usrp_fx2_p (q))){
+ 
+  size_t cnt = libusb_get_device_list(NULL, &list);
+  size_t i = 0;
+
+  if (cnt < 0)
+    fprintf(stderr, "usrp: libusb_get_device_list failed %d\n", cnt);
+
+  for (i = 0; i < cnt; i++) {
+    q = list[i];
+    if (usrp_usrp_p (q) || (fx2_ok_p && usrp_fx2_p (q))) {
        if (n_found == nth)     // return this one
          return q;
        n_found++;              // keep looking
-      }
-      q = q->next;
     }
-    p = p->next;
   }
+
+  libusb_free_device_list(list, 1);
   return 0;    // not found
 }
 
-static struct usb_dev_handle *
-usrp_open_interface (struct usb_device *dev, int interface, int altinterface)
+static struct libusb_device_handle *
+usrp_open_interface (struct libusb_device *dev, int interface, int 
altinterface)
 {
-  struct usb_dev_handle *udh = usb_open (dev);
-  if (udh == 0)
+  struct libusb_device_handle *udh;
+  int ret;
+
+  if (libusb_open (dev, &udh) < 0)
     return 0;
 
-  if (dev != dev_handle_to_dev (udh)){
+  if (dev != libusb_get_device (udh)){
     fprintf (stderr, "%s:%d: internal error!\n", __FILE__, __LINE__);
     abort ();
   }
 
-#if defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
-  // There's no get get_configuration function, and with some of the newer 
kernels
-  // setting the configuration, even if to the same value, hoses any other 
processes
-  // that have it open.  Hence we opt to not set it at all (We've only
-  // got a single configuration anyway).  This may hose the win32 stuff...
-
-  // Appears to be required for libusb-win32 and Cygwin -- dew 09/20/06
-  if (usb_set_configuration (udh, 1) < 0){
-    /*
-     * Ignore this error.  
-     *
-     * Seems that something changed in drivers/usb/core/devio.c:proc_setconfig 
such that
-     * it returns -EBUSY if _any_ of the interfaces of a device are open.
-     * We've only got a single configuration, so setting it doesn't even seem
-     * like it should be required.
-     */
-  }
-#endif
-
-  if (usb_claim_interface (udh, interface) < 0){
+  if ((ret = libusb_claim_interface (udh, interface)) < 0) {
     fprintf (stderr, "%s:usb_claim_interface: failed interface %d\n", 
__FUNCTION__,interface);
-    fprintf (stderr, "%s\n", usb_strerror());
-    usb_close (udh);
+    fprintf (stderr, "%d\n", ret);
+    libusb_close (udh);
     return 0;
   }
 
-  if (usb_set_altinterface (udh, altinterface) < 0){
+  if ((ret = libusb_set_interface_alt_setting (udh, interface,
+                                                   altinterface)) < 0) {
     fprintf (stderr, "%s:usb_set_alt_interface: failed\n", __FUNCTION__);
-    fprintf (stderr, "%s\n", usb_strerror());
-    usb_release_interface (udh, interface);
-    usb_close (udh);
+    fprintf (stderr, "%d\n", ret);
+    libusb_release_interface (udh, interface);
+    libusb_close (udh);
     return 0;
   }
 
   return udh;
 }
 
-struct usb_dev_handle *
-usrp_open_cmd_interface (struct usb_device *dev)
+struct libusb_device_handle *
+usrp_open_cmd_interface (struct libusb_device *dev)
 {
   return usrp_open_interface (dev, USRP_CMD_INTERFACE, USRP_CMD_ALTINTERFACE);
 }
 
-struct usb_dev_handle *
-usrp_open_rx_interface (struct usb_device *dev)
+struct libusb_device_handle *
+usrp_open_rx_interface (struct libusb_device *dev)
 {
   return usrp_open_interface (dev, USRP_RX_INTERFACE, USRP_RX_ALTINTERFACE);
 }
 
-struct usb_dev_handle *
-usrp_open_tx_interface (struct usb_device *dev)
+struct libusb_device_handle *
+usrp_open_tx_interface (struct libusb_device *dev)
 {
   return usrp_open_interface (dev, USRP_TX_INTERFACE, USRP_TX_ALTINTERFACE);
 }
 
 bool
-usrp_close_interface (struct usb_dev_handle *udh)
+usrp_close_interface (struct libusb_device_handle *udh)
 {
-  // we're assuming that closing an interface automatically releases it.
-  return usb_close (udh) == 0;
+  // returns void 
+  libusb_close(udh);
+  return 0;
 }
 
 // ----------------------------------------------------------------
 // write internal ram using Cypress vendor extension
 
 static bool
-write_internal_ram (struct usb_dev_handle *udh, unsigned char *buf,
+write_internal_ram (struct libusb_device_handle *udh, unsigned char *buf,
                    int start_addr, size_t len)
 {
   int addr;
@@ -324,11 +308,11 @@ write_internal_ram (struct usb_dev_handle *udh, unsigned 
char *buf,
     if (n > quanta)
       n = quanta;
 
-    a = usb_control_msg (udh, 0x40, 0xA0,
-                        addr, 0, (char *)(buf + (addr - start_addr)), n, 1000);
+    a = libusb_control_transfer (udh, 0x40, 0xA0,
+                        addr, 0, (unsigned char *)(buf + (addr - start_addr)), 
n, 1000);
 
     if (a < 0){
-      fprintf(stderr,"write_internal_ram failed: %s\n", usb_strerror());
+      fprintf(stderr,"write_internal_ram failed: %u\n", a);
       return false;
     }
   }
@@ -339,7 +323,7 @@ write_internal_ram (struct usb_dev_handle *udh, unsigned 
char *buf,
 // whack the CPUCS register using the upload RAM vendor extension
 
 static bool
-reset_cpu (struct usb_dev_handle *udh, bool reset_p)
+reset_cpu (struct libusb_device_handle *udh, bool reset_p)
 {
   unsigned char v;
 
@@ -355,7 +339,7 @@ reset_cpu (struct usb_dev_handle *udh, bool reset_p)
 // Load intel format file into cypress FX2 (8051)
 
 static bool
-_usrp_load_firmware (struct usb_dev_handle *udh, const char *filename,
+_usrp_load_firmware (struct libusb_device_handle *udh, const char *filename,
                     unsigned char hash[USRP_HASH_SIZE])
 {
   FILE *f = fopen (filename, "ra");
@@ -437,18 +421,20 @@ _usrp_load_firmware (struct usb_dev_handle *udh, const 
char *filename,
 // write vendor extension command to USRP
 
 static int
-write_cmd (struct usb_dev_handle *udh,
+write_cmd (struct libusb_device_handle *udh,
           int request, int value, int index,
           unsigned char *bytes, int len)
 {
   int  requesttype = (request & 0x80) ? VRT_VENDOR_IN : VRT_VENDOR_OUT;
 
-  int r = usb_control_msg (udh, requesttype, request, value, index,
-                          (char *) bytes, len, 1000);
+  int r = libusb_control_transfer(udh, requesttype, request, value, index,
+                                  (unsigned char *) bytes, len, 1000);
+
   if (r < 0){
     // we get EPIPE if the firmware stalls the endpoint.
-    if (errno != EPIPE)
-      fprintf (stderr, "usb_control_msg failed: %s\n", usb_strerror ());
+    if (r != LIBUSB_ERROR_PIPE) {
+      fprintf (stderr, "libusb_control_transfer failed: %i\n", r);
+    }
   }
 
   return r;
@@ -458,7 +444,7 @@ write_cmd (struct usb_dev_handle *udh,
 // load fpga
 
 static bool
-_usrp_load_fpga (struct usb_dev_handle *udh, const char *filename,
+_usrp_load_fpga (struct libusb_device_handle *udh, const char *filename,
                 unsigned char hash[USRP_HASH_SIZE])
 {
   bool ok = true;
@@ -536,7 +522,7 @@ _usrp_load_fpga (struct usb_dev_handle *udh, const char 
*filename,
 // ----------------------------------------------------------------
 
 bool 
-usrp_set_led (struct usb_dev_handle *udh, int which, bool on)
+usrp_set_led (struct libusb_device_handle *udh, int which, bool on)
 {
   int r = write_cmd (udh, VRQ_SET_LED, on, which, 0, 0);
 
@@ -544,38 +530,38 @@ usrp_set_led (struct usb_dev_handle *udh, int which, bool 
on)
 }
 
 bool
-usrp_set_hash (struct usb_dev_handle *udh, int which,
+usrp_set_hash (struct libusb_device_handle *udh, int which,
               const unsigned char hash[USRP_HASH_SIZE])
 {
   which &= 1;
   
   // we use the Cypress firmware down load command to jam it in.
-  int r = usb_control_msg (udh, 0x40, 0xa0, hash_slot_addr[which], 0,
-                          (char *) hash, USRP_HASH_SIZE, 1000);
+  int r = libusb_control_transfer (udh, 0x40, 0xa0, hash_slot_addr[which], 0,
+                          (unsigned char *) hash, USRP_HASH_SIZE, 1000);
   return r == USRP_HASH_SIZE;
 }
 
 bool
-usrp_get_hash (struct usb_dev_handle *udh, int which, 
+usrp_get_hash (struct libusb_device_handle *udh, int which, 
               unsigned char hash[USRP_HASH_SIZE])
 {
   which &= 1;
   
   // we use the Cypress firmware upload command to fetch it.
-  int r = usb_control_msg (udh, 0xc0, 0xa0, hash_slot_addr[which], 0,
-                          (char *) hash, USRP_HASH_SIZE, 1000);
+  int r = libusb_control_transfer (udh, 0xc0, 0xa0, hash_slot_addr[which], 0,
+                          (unsigned char *) hash, USRP_HASH_SIZE, 1000);
   return r == USRP_HASH_SIZE;
 }
 
 static bool
-usrp_set_switch (struct usb_dev_handle *udh, int cmd_byte, bool on)
+usrp_set_switch (struct libusb_device_handle *udh, int cmd_byte, bool on)
 {
   return write_cmd (udh, cmd_byte, on, 0, 0, 0) == 0;
 }
 
 
 static bool
-usrp1_fpga_write (struct usb_dev_handle *udh,
+usrp1_fpga_write (struct libusb_device_handle *udh,
                  int regno, int value)
 {
   // on the rev1 usrp, we use the generic spi_write interface
@@ -594,7 +580,7 @@ usrp1_fpga_write (struct usb_dev_handle *udh,
 }
 
 static bool
-usrp1_fpga_read (struct usb_dev_handle *udh,
+usrp1_fpga_read (struct libusb_device_handle *udh,
                 int regno, int *value)
 {
   *value = 0;
@@ -613,9 +599,9 @@ usrp1_fpga_read (struct usb_dev_handle *udh,
 
 
 bool
-usrp_write_fpga_reg (struct usb_dev_handle *udh, int reg, int value)
+usrp_write_fpga_reg (struct libusb_device_handle *udh, int reg, int value)
 {
-  switch (usrp_hw_rev (dev_handle_to_dev (udh))){
+  switch (usrp_hw_rev (libusb_get_device (udh))){
   case 0:                      // not supported ;)
     abort();   
 
@@ -625,9 +611,9 @@ usrp_write_fpga_reg (struct usb_dev_handle *udh, int reg, 
int value)
 }
 
 bool
-usrp_read_fpga_reg (struct usb_dev_handle *udh, int reg, int *value)
+usrp_read_fpga_reg (struct libusb_device_handle *udh, int reg, int *value)
 {
-  switch (usrp_hw_rev (dev_handle_to_dev (udh))){
+  switch (usrp_hw_rev (libusb_get_device (udh))){
   case 0:              // not supported ;)
     abort();
     
@@ -637,31 +623,31 @@ usrp_read_fpga_reg (struct usb_dev_handle *udh, int reg, 
int *value)
 }
 
 bool 
-usrp_set_fpga_reset (struct usb_dev_handle *udh, bool on)
+usrp_set_fpga_reset (struct libusb_device_handle *udh, bool on)
 {
   return usrp_set_switch (udh, VRQ_FPGA_SET_RESET, on);
 }
 
 bool 
-usrp_set_fpga_tx_enable (struct usb_dev_handle *udh, bool on)
+usrp_set_fpga_tx_enable (struct libusb_device_handle *udh, bool on)
 {
   return usrp_set_switch (udh, VRQ_FPGA_SET_TX_ENABLE, on);
 }
 
 bool 
-usrp_set_fpga_rx_enable (struct usb_dev_handle *udh, bool on)
+usrp_set_fpga_rx_enable (struct libusb_device_handle *udh, bool on)
 {
   return usrp_set_switch (udh, VRQ_FPGA_SET_RX_ENABLE, on);
 }
 
 bool 
-usrp_set_fpga_tx_reset (struct usb_dev_handle *udh, bool on)
+usrp_set_fpga_tx_reset (struct libusb_device_handle *udh, bool on)
 {
   return usrp_set_switch (udh, VRQ_FPGA_SET_TX_RESET, on);
 }
 
 bool 
-usrp_set_fpga_rx_reset (struct usb_dev_handle *udh, bool on)
+usrp_set_fpga_rx_reset (struct libusb_device_handle *udh, bool on)
 {
   return usrp_set_switch (udh, VRQ_FPGA_SET_RX_RESET, on);
 }
@@ -688,11 +674,11 @@ compute_hash (const char *filename, unsigned char 
hash[USRP_HASH_SIZE])
 }
 
 static usrp_load_status_t
-usrp_conditionally_load_something (struct usb_dev_handle *udh,
+usrp_conditionally_load_something (struct libusb_device_handle *udh,
                                   const char *filename,
                                   bool force,
                                   int slot,
-                                  bool loader (struct usb_dev_handle *,
+                                  bool loader (struct libusb_device_handle *,
                                                const char *,
                                                unsigned char [USRP_HASH_SIZE]))
 {
@@ -721,7 +707,7 @@ usrp_conditionally_load_something (struct usb_dev_handle 
*udh,
 }
 
 usrp_load_status_t
-usrp_load_firmware (struct usb_dev_handle *udh,
+usrp_load_firmware (struct libusb_device_handle *udh,
                    const char *filename,
                    bool force)
 {
@@ -731,7 +717,7 @@ usrp_load_firmware (struct usb_dev_handle *udh,
 }
 
 usrp_load_status_t
-usrp_load_fpga (struct usb_dev_handle *udh,
+usrp_load_fpga (struct libusb_device_handle *udh,
                const char *filename,
                bool force)
 {
@@ -740,23 +726,22 @@ usrp_load_fpga (struct usb_dev_handle *udh,
                                            _usrp_load_fpga);
 }
 
-static usb_dev_handle *
+static libusb_device_handle *
 open_nth_cmd_interface (int nth)
 {
-  struct usb_device *udev = usrp_find_device (nth);
+  struct libusb_device *udev = usrp_find_device (nth);
   if (udev == 0){
     fprintf (stderr, "usrp: failed to find usrp[%d]\n", nth);
     return 0;
   }
 
-  struct usb_dev_handle *udh;
+  struct libusb_device_handle *udh;
 
   udh = usrp_open_cmd_interface (udev);
   if (udh == 0){
     // FIXME this could be because somebody else has it open.
     // We should delay and retry...
     fprintf (stderr, "open_nth_cmd_interface: open_cmd_interface failed\n");
-    usb_strerror ();
     return 0;
   }
 
@@ -793,7 +778,7 @@ mdelay (int millisecs)
 
 usrp_load_status_t
 usrp_load_firmware_nth (int nth, const char *filename, bool force){
-  struct usb_dev_handle *udh = open_nth_cmd_interface (nth);
+  struct libusb_device_handle *udh = open_nth_cmd_interface (nth);
   if (udh == 0)
     return ULS_ERROR;
 
@@ -820,9 +805,6 @@ usrp_load_firmware_nth (int nth, const char *filename, bool 
force){
     t.tv_nsec = 0;
     our_nanosleep (&t);
 
-    usb_find_busses ();                // rescan busses and devices
-    usb_find_devices ();
-
     return ULS_OK;
 
   default:
@@ -866,7 +848,7 @@ usrp_load_standard_bits (int nth, bool force,
 
   // first, figure out what hardware rev we're dealing with
   {
-    struct usb_device *udev = usrp_find_device (nth);
+    struct libusb_device *udev = usrp_find_device (nth);
     if (udev == 0){
       fprintf (stderr, "usrp: failed to find usrp[%d]\n", nth);
       return false;
@@ -904,7 +886,7 @@ usrp_load_standard_bits (int nth, bool force,
     return false;
   }
 
-  struct usb_dev_handle *udh = open_nth_cmd_interface (nth);
+  struct libusb_device_handle *udh = open_nth_cmd_interface (nth);
   if (udh == 0)
     return false;
   
@@ -919,7 +901,7 @@ usrp_load_standard_bits (int nth, bool force,
 }
 
 bool
-_usrp_get_status (struct usb_dev_handle *udh, int which, bool *trouble)
+_usrp_get_status (struct libusb_device_handle *udh, int which, bool *trouble)
 {
   unsigned char        status;
   *trouble = true;
@@ -933,20 +915,20 @@ _usrp_get_status (struct usb_dev_handle *udh, int which, 
bool *trouble)
 }
 
 bool
-usrp_check_rx_overrun (struct usb_dev_handle *udh, bool *overrun_p)
+usrp_check_rx_overrun (struct libusb_device_handle *udh, bool *overrun_p)
 {
   return _usrp_get_status (udh, GS_RX_OVERRUN, overrun_p);
 }
 
 bool
-usrp_check_tx_underrun (struct usb_dev_handle *udh, bool *underrun_p)
+usrp_check_tx_underrun (struct libusb_device_handle *udh, bool *underrun_p)
 {
   return _usrp_get_status (udh, GS_TX_UNDERRUN, underrun_p);
 }
 
 
 bool
-usrp_i2c_write (struct usb_dev_handle *udh, int i2c_addr,
+usrp_i2c_write (struct libusb_device_handle *udh, int i2c_addr,
                const void *buf, int len)
 {
   if (len < 1 || len > MAX_EP0_PKTSIZE)
@@ -958,7 +940,7 @@ usrp_i2c_write (struct usb_dev_handle *udh, int i2c_addr,
 
 
 bool
-usrp_i2c_read (struct usb_dev_handle *udh, int i2c_addr,
+usrp_i2c_read (struct libusb_device_handle *udh, int i2c_addr,
               void *buf, int len)
 {
   if (len < 1 || len > MAX_EP0_PKTSIZE)
@@ -969,7 +951,7 @@ usrp_i2c_read (struct usb_dev_handle *udh, int i2c_addr,
 }
 
 bool
-usrp_spi_write (struct usb_dev_handle *udh,
+usrp_spi_write (struct libusb_device_handle *udh,
                int optional_header, int enables, int format,
                const void *buf, int len)
 {
@@ -984,7 +966,7 @@ usrp_spi_write (struct usb_dev_handle *udh,
 
 
 bool
-usrp_spi_read (struct usb_dev_handle *udh,
+usrp_spi_read (struct libusb_device_handle *udh,
               int optional_header, int enables, int format,
               void *buf, int len)
 {
@@ -998,7 +980,7 @@ usrp_spi_read (struct usb_dev_handle *udh,
 }
 
 bool
-usrp_9862_write (struct usb_dev_handle *udh, int which_codec,
+usrp_9862_write (struct libusb_device_handle *udh, int which_codec,
                 int regno, int value)
 {
   if (0)
@@ -1016,7 +998,7 @@ usrp_9862_write (struct usb_dev_handle *udh, int 
which_codec,
 }
 
 bool
-usrp_9862_read (struct usb_dev_handle *udh, int which_codec,
+usrp_9862_read (struct libusb_device_handle *udh, int which_codec,
                int regno, unsigned char *value)
 {
   return usrp_spi_read (udh, 0x80 | (regno & 0x3f),
@@ -1026,7 +1008,7 @@ usrp_9862_read (struct usb_dev_handle *udh, int 
which_codec,
 }
 
 bool
-usrp_9862_write_many (struct usb_dev_handle *udh,
+usrp_9862_write_many (struct libusb_device_handle *udh,
                      int which_codec,
                      const unsigned char *buf,
                      int len)
@@ -1047,7 +1029,7 @@ usrp_9862_write_many (struct usb_dev_handle *udh,
 
 
 bool
-usrp_9862_write_many_all (struct usb_dev_handle *udh,
+usrp_9862_write_many_all (struct libusb_device_handle *udh,
                           const unsigned char *buf, int len)
 {
   // FIXME handle 2/2 and 4/4 versions
@@ -1059,7 +1041,7 @@ usrp_9862_write_many_all (struct usb_dev_handle *udh,
 }
 
 static void
-power_down_9862s (struct usb_dev_handle *udh)
+power_down_9862s (struct libusb_device_handle *udh)
 {
   static const unsigned char regs[] = {
     REG_RX_PWR_DN,     0x01,                   // everything
@@ -1067,7 +1049,7 @@ power_down_9862s (struct usb_dev_handle *udh)
     REG_TX_MODULATOR,  0x00                    // coarse & fine modulators 
disabled
   };
 
-  switch (usrp_hw_rev (dev_handle_to_dev (udh))){
+  switch (usrp_hw_rev (libusb_get_device (udh))){
   case 0:
     break;
 
@@ -1082,7 +1064,7 @@ power_down_9862s (struct usb_dev_handle *udh)
 static const int EEPROM_PAGESIZE = 16;
 
 bool
-usrp_eeprom_write (struct usb_dev_handle *udh, int i2c_addr,
+usrp_eeprom_write (struct libusb_device_handle *udh, int i2c_addr,
                   int eeprom_offset, const void *buf, int len)
 {
   unsigned char cmd[2];
@@ -1107,7 +1089,7 @@ usrp_eeprom_write (struct usb_dev_handle *udh, int 
i2c_addr,
 }
 
 bool
-usrp_eeprom_read (struct usb_dev_handle *udh, int i2c_addr,
+usrp_eeprom_read (struct libusb_device_handle *udh, int i2c_addr,
                  int eeprom_offset, void *buf, int len)
 {
   unsigned char *p = (unsigned char *) buf;
@@ -1169,7 +1151,7 @@ tx_slot_p (int slot)
 }
 
 bool
-usrp_write_aux_dac (struct usb_dev_handle *udh, int slot,
+usrp_write_aux_dac (struct libusb_device_handle *udh, int slot,
                    int which_dac, int value)
 {
   int which_codec;
@@ -1200,7 +1182,7 @@ usrp_write_aux_dac (struct usb_dev_handle *udh, int slot,
 
 
 bool
-usrp_read_aux_adc (struct usb_dev_handle *udh, int slot,
+usrp_read_aux_adc (struct libusb_device_handle *udh, int slot,
                   int which_adc, int *value)
 {
   *value = 0;
@@ -1279,7 +1261,7 @@ set_chksum (unsigned char *buf)
 }
 
 static usrp_dbeeprom_status_t
-read_dboard_eeprom (struct usb_dev_handle *udh,
+read_dboard_eeprom (struct libusb_device_handle *udh,
                    int slot_id, unsigned char *buf)
 {
   int i2c_addr = slot_to_i2c_addr (slot_id);
@@ -1303,7 +1285,7 @@ read_dboard_eeprom (struct usb_dev_handle *udh,
 }
 
 usrp_dbeeprom_status_t
-usrp_read_dboard_eeprom (struct usb_dev_handle *udh,
+usrp_read_dboard_eeprom (struct libusb_device_handle *udh,
                         int slot_id, usrp_dboard_eeprom *eeprom)
 {
   unsigned char buf[DB_EEPROM_CLEN];
@@ -1323,7 +1305,7 @@ usrp_read_dboard_eeprom (struct usb_dev_handle *udh,
 }
 
 bool
-usrp_write_dboard_offsets (struct usb_dev_handle *udh, int slot_id,
+usrp_write_dboard_offsets (struct libusb_device_handle *udh, int slot_id,
                           short offset0, short offset1)
 {
   unsigned char buf[DB_EEPROM_CLEN];
@@ -1343,15 +1325,19 @@ usrp_write_dboard_offsets (struct usb_dev_handle *udh, 
int slot_id,
 }
 
 std::string
-usrp_serial_number(struct usb_dev_handle *udh)
+usrp_serial_number(struct libusb_device_handle *udh)
 {
-  unsigned char iserial = usb_device(udh)->descriptor.iSerialNumber;
+  struct libusb_device_descriptor desc;
+  if (libusb_get_device_descriptor(libusb_get_device(udh), &desc) < 0)
+    fprintf (stderr, "usrp: libusb_get_device_descriptor failed\n");
+
+  unsigned char iserial = desc.iSerialNumber;
   if (iserial == 0)
     return "";
 
-  char buf[1024];
-  if (usb_get_string_simple(udh, iserial, buf, sizeof(buf)) < 0)
+  unsigned char buf[1024];
+  if (libusb_get_string_descriptor_ascii(udh, iserial, buf, sizeof(buf)) < 0)
     return "";
 
-  return buf;
+  return (char*) buf;
 }
diff --git a/usrp/host/swig/usrp_prims.i b/usrp/host/swig/usrp_prims.i
index 78a775c..25a3968 100644
--- a/usrp/host/swig/usrp_prims.i
+++ b/usrp/host/swig/usrp_prims.i
@@ -42,8 +42,8 @@
 
 enum usrp_load_status_t { ULS_ERROR = 0, ULS_OK, ULS_ALREADY_LOADED };
 
-struct usb_dev_handle;
-struct usb_device;
+struct libusb_device_handle;
+struct libusb_device;
 
 /*!
  * \brief initialize libusb; probe busses and devices.
@@ -63,20 +63,20 @@ void usrp_rescan ();
  *   configured USRP (firmware loaded)
  *   unconfigured Cypress FX2 (only if fx2_ok_p is true)
  */
-struct usb_device *usrp_find_device (int nth, bool fx2_ok_p = false);
+struct libusb_device *usrp_find_device (int nth, bool fx2_ok_p = false);
 
-bool usrp_usrp_p (struct usb_device *q);               //< is this a USRP
-bool usrp_usrp0_p (struct usb_device *q);              //< is this a USRP Rev 0
-bool usrp_usrp1_p (struct usb_device *q);              //< is this a USRP Rev 1
-bool usrp_usrp2_p (struct usb_device *q);              //< is this a USRP Rev 2
-int  usrp_hw_rev (struct usb_device *q);               //< return h/w rev code
-bool usrp_fx2_p (struct usb_device *q);                        //< is this an 
unconfigured Cypress FX2
+bool usrp_usrp_p (struct libusb_device *q);            //< is this a USRP
+bool usrp_usrp0_p (struct libusb_device *q);           //< is this a USRP Rev 0
+bool usrp_usrp1_p (struct libusb_device *q);           //< is this a USRP Rev 1
+bool usrp_usrp2_p (struct libusb_device *q);           //< is this a USRP Rev 2
+int  usrp_hw_rev (struct libusb_device *q);            //< return h/w rev code
+bool usrp_fx2_p (struct libusb_device *q);                     //< is this an 
unconfigured Cypress FX2
 
-bool usrp_unconfigured_usrp_p (struct usb_device *q);  //< some kind of 
unconfigured USRP
-bool usrp_configured_usrp_p (struct usb_device *q);    //< some kind of 
configured USRP
+bool usrp_unconfigured_usrp_p (struct libusb_device *q);       //< some kind 
of unconfigured USRP
+bool usrp_configured_usrp_p (struct libusb_device *q); //< some kind of 
configured USRP
 
 /*!
- * \brief given a usb_device return an instance of the appropriate 
usb_dev_handle
+ * \brief given a libusb_device return an instance of the appropriate 
libusb_device_handle
  *
  * These routines claim the specified interface and select the
  * correct alternate interface.  (USB nomenclature is totally screwed!)
@@ -84,14 +84,14 @@ bool usrp_configured_usrp_p (struct usb_device *q); //< 
some kind of configured
  * If interface can't be opened, or is already claimed by some other
  * process, 0 is returned.
  */
-struct usb_dev_handle *usrp_open_cmd_interface (struct usb_device *dev);
-struct usb_dev_handle *usrp_open_rx_interface (struct usb_device *dev);
-struct usb_dev_handle *usrp_open_tx_interface (struct usb_device *dev);
+struct libusb_device_handle *usrp_open_cmd_interface (struct libusb_device 
*dev);
+struct libusb_device_handle *usrp_open_rx_interface (struct libusb_device 
*dev);
+struct libusb_device_handle *usrp_open_tx_interface (struct libusb_device 
*dev);
 
 /*!
  * \brief close interface.
  */
-bool usrp_close_interface (struct usb_dev_handle *udh);
+bool usrp_close_interface (struct libusb_device_handle *udh);
 
 /*!
  * \brief load intel hex format file into USRP/Cypress FX2 (8051).
@@ -103,7 +103,7 @@ bool usrp_close_interface (struct usb_dev_handle *udh);
  */
 
 usrp_load_status_t 
-usrp_load_firmware (struct usb_dev_handle *udh, const char *filename, bool 
force);
+usrp_load_firmware (struct libusb_device_handle *udh, const char *filename, 
bool force);
 
 /*!
  * \brief load intel hex format file into USRP FX2 (8051).
@@ -122,7 +122,7 @@ usrp_load_firmware_nth (int nth, const char *filename, bool 
force);
  * \brief load fpga configuration bitstream
  */
 usrp_load_status_t
-usrp_load_fpga (struct usb_dev_handle *udh, const char *filename, bool force);
+usrp_load_fpga (struct libusb_device_handle *udh, const char *filename, bool 
force);
 
 /*!
  * \brief load the regular firmware and fpga bitstream in the Nth USRP.
@@ -136,12 +136,12 @@ bool usrp_load_standard_bits (int nth, bool force);
 %include <fpga_regs_standard.h>
 
 
-bool usrp_write_fpga_reg (struct usb_dev_handle *udh, int reg, int value);
+bool usrp_write_fpga_reg (struct libusb_device_handle *udh, int reg, int 
value);
 
 %inline %{
 
 int 
-usrp_read_fpga_reg (struct usb_dev_handle *udh, int reg)
+usrp_read_fpga_reg (struct libusb_device_handle *udh, int reg)
 {
   int value;
   bool ok = usrp_read_fpga_reg (udh, reg, &value);
@@ -153,37 +153,37 @@ usrp_read_fpga_reg (struct usb_dev_handle *udh, int reg)
 
 %}
 
-bool usrp_set_fpga_reset (struct usb_dev_handle *udh, bool on);
-bool usrp_set_fpga_tx_enable (struct usb_dev_handle *udh, bool on);
-bool usrp_set_fpga_rx_enable (struct usb_dev_handle *udh, bool on);
-bool usrp_set_fpga_tx_reset (struct usb_dev_handle *udh, bool on);
-bool usrp_set_fpga_rx_reset (struct usb_dev_handle *udh, bool on);
-bool usrp_set_led (struct usb_dev_handle *udh, int which, bool on);
+bool usrp_set_fpga_reset (struct libusb_device_handle *udh, bool on);
+bool usrp_set_fpga_tx_enable (struct libusb_device_handle *udh, bool on);
+bool usrp_set_fpga_rx_enable (struct libusb_device_handle *udh, bool on);
+bool usrp_set_fpga_tx_reset (struct libusb_device_handle *udh, bool on);
+bool usrp_set_fpga_rx_reset (struct libusb_device_handle *udh, bool on);
+bool usrp_set_led (struct libusb_device_handle *udh, int which, bool on);
 
-bool usrp_check_rx_overrun (struct usb_dev_handle *udh, bool *overrun_p);
-bool usrp_check_tx_underrun (struct usb_dev_handle *udh, bool *underrun_p);
+bool usrp_check_rx_overrun (struct libusb_device_handle *udh, bool *overrun_p);
+bool usrp_check_tx_underrun (struct libusb_device_handle *udh, bool 
*underrun_p);
 
 // i2c_read and i2c_write are limited to a maximum len of 64 bytes.
 
-bool usrp_i2c_write (struct usb_dev_handle *udh, int i2c_addr,
+bool usrp_i2c_write (struct libusb_device_handle *udh, int i2c_addr,
                     void *buf, int len);
 
-bool usrp_i2c_read (struct usb_dev_handle *udh, int i2c_addr,
+bool usrp_i2c_read (struct libusb_device_handle *udh, int i2c_addr,
                    void *buf, int len);
 
 // spi_read and spi_write are limited to a maximum of 64 bytes
 // See usrp_spi_defs.h for more info
 
-bool usrp_spi_write (struct usb_dev_handle *udh,
+bool usrp_spi_write (struct libusb_device_handle *udh,
                     int optional_header, int enables, int format,
                     unsigned char *buf, int len);
 
-bool usrp_spi_read (struct usb_dev_handle *udh,
+bool usrp_spi_read (struct libusb_device_handle *udh,
                     int optional_header, int enables, int format,
                     unsigned char *buf, int len);
 
 
-bool usrp_9862_write (struct usb_dev_handle *udh,
+bool usrp_9862_write (struct libusb_device_handle *udh,
                      int which_codec,                  // [0,  1]
                      int regno,                        // [0, 63]
                      int value);                       // [0, 255]     
@@ -191,7 +191,7 @@ bool usrp_9862_write (struct usb_dev_handle *udh,
 %inline %{
 
 int 
-usrp_9862_read (struct usb_dev_handle *udh, int which_codec, int reg)
+usrp_9862_read (struct libusb_device_handle *udh, int which_codec, int reg)
 {
   unsigned char value;
   bool ok = usrp_9862_read (udh, which_codec, reg, &value);
@@ -206,7 +206,7 @@ usrp_9862_read (struct usb_dev_handle *udh, int 
which_codec, int reg)
 %inline %{
 
 bool 
-usrp_eeprom_write (struct usb_dev_handle *udh, int i2c_addr,
+usrp_eeprom_write (struct libusb_device_handle *udh, int i2c_addr,
                   int eeprom_offset, const std::string buf)
 {
   return usrp_eeprom_write (udh, i2c_addr, eeprom_offset,
@@ -214,7 +214,7 @@ usrp_eeprom_write (struct usb_dev_handle *udh, int i2c_addr,
 }
   
 std::string
-usrp_eeprom_read (struct usb_dev_handle *udh, int i2c_addr,
+usrp_eeprom_read (struct libusb_device_handle *udh, int i2c_addr,
                  int eeprom_offset, int len)
 {
   if (len <= 0)
@@ -230,12 +230,12 @@ usrp_eeprom_read (struct usb_dev_handle *udh, int 
i2c_addr,
 
 %}
 
-bool usrp_write_aux_dac (struct usb_dev_handle *uhd, int slot,
+bool usrp_write_aux_dac (struct libusb_device_handle *uhd, int slot,
                         int which_dac, int value);
 
 %inline %{
 
-int usrp_read_aux_adc (struct usb_dev_handle *udh, int slot, int which_adc)
+int usrp_read_aux_adc (struct libusb_device_handle *udh, int slot, int 
which_adc)
 {
   int value;
   bool ok = usrp_read_aux_adc (udh, slot, which_adc, &value);
@@ -253,7 +253,7 @@ int usrp_read_aux_adc (struct usb_dev_handle *udh, int 
slot, int which_adc)
  * Note that this only works on a configured usrp.
  * \returns non-zero length string iff successful.
  */
-std::string usrp_serial_number(struct usb_dev_handle *udh);
+std::string usrp_serial_number(struct libusb_device_handle *udh);
 
 /*!
  * \brief usrp daughterboard id to name mapping
-- 
1.6.2.5





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