Merged -r3596:3600 of eb/ra_wb into trunk. This contains the

BSD read-ahead/write-behind fast usb support.


git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3601 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 47 insertions, 0 deletions

diff --git a/usrp/host/lib/fusb_sysconfig_ra_wb.cc b/usrp/host/lib/fusb_sysconfig_ra_wb.cc
new file mode 100644
index 000000000..68eecedc5
--- /dev/null
+++ b/usrp/host/lib/fusb_sysconfig_ra_wb.cc
@@ -0,0 +1,47 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2003,2006 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio 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 General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include <fusb.h>
+#include <fusb_ra_wb.h>
+
+//static const int MAX_BLOCK_SIZE = 16 * 1024;		// hard limit
+// there's no hard limit, even before making any changes to the driver
+// 64k is empirically a pretty good number
+static const int MAX_BLOCK_SIZE = 64 * 1024;
+// there is a limit of 1 MB in the driver for the buffer size
+static const int FUSB_BUFFER_SIZE = 256 * (1L << 10);	// 256 kB
+
+fusb_devhandle *
+fusb_sysconfig::make_devhandle (usb_dev_handle *udh)
+{
+  return new fusb_devhandle_ra_wb (udh);
+}
+	
+int fusb_sysconfig::max_block_size ()
+{
+  return MAX_BLOCK_SIZE;
+}
+
+int fusb_sysconfig::default_buffer_size ()
+{
+  return FUSB_BUFFER_SIZE;
+}