1 files changed, 144 insertions, 0 deletions
diff --git a/libs/surfaces/tranzport/io_kernel.cc b/libs/surfaces/tranzport/io_kernel.cc
new file mode 100644
index 0000000000..5e29e9ac7b
--- /dev/null
+++ b/libs/surfaces/tranzport/io_kernel.cc
@@ -0,0 +1,144 @@
+/*
+ *   Copyright (C) 2006 Paul Davis 
+ *   Copyright (C) 2007 Michael Taht
+ *
+ *   This program 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 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program 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 this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *  
+ *   */
+
+#if HAVE_TRANZPORT_KERNEL_DRIVER
+#include <fcntl.h>
+#include <errno.h>
+#include <poll.h>
+#include "tranzport_control_protocol.h"
+
+// Something like open(/dev/surface/tranzport/event) for reading and raw for writing) would be better in the long run
+// Also support for multiple tranzports needs to be figured out
+// And bulk reads/writes in general
+
+bool
+TranzportControlProtocol::probe ()
+{
+	if((udev = ::open(TRANZPORT_DEVICE,O_RDWR))> 0) {
+		::close(udev);
+		return true; 
+	} 
+	error << _("Tranzport: Can't open device for Read/Write: ") << endmsg;
+	return false;
+}
+
+int
+TranzportControlProtocol::open ()
+{
+	if((udev=::open(TRANZPORT_DEVICE,O_RDWR))> 0) {
+		return(udev);
+	} 
+	error << _("Tranzport: no device detected") << endmsg;
+	return udev;
+}
+
+int
+TranzportControlProtocol::close ()
+{
+	int ret = 0;
+
+	if (udev < 1) {
+		return 0;
+	}
+
+	if ((ret = ::close (udev)) != 0) {
+		error << _("Tranzport: cannot close device") << endmsg;
+	}
+
+	return ret;
+}
+
+// someday do buffered reads, presently this does blocking reads, which is bad...
+
+int TranzportControlProtocol::read(uint8_t *buf, uint32_t timeout_override) 
+{
+	last_read_error = ::read (udev, (char *) buf, 8);
+	switch(errno) {
+	case -ENOENT:
+	case -ENXIO:
+	case -ECONNRESET:
+	case -ESHUTDOWN: 
+	case -ENODEV: 
+		cerr << "Tranzport disconnected, errno: " << last_read_error;
+		set_active(false);
+		break;
+	case -ETIMEDOUT: // This is not normal, but lets see what happened
+		cerr << "Tranzport read timed out, errno: " << last_read_error;
+		break;
+	default: 
+#if DEBUG_TRANZPORT
+		cerr << "Got an unknown error on read:" << last_read_error "\n";
+#endif
+		break;
+	}
+
+	return last_read_error;
+} 
+
+	
+int
+TranzportControlProtocol::write_noretry (uint8_t* cmd, uint32_t timeout_override)
+{
+	// inflight is now taken care of by the driver, but...
+	if(inflight > MAX_TRANZPORT_INFLIGHT) { return (-1); }
+	int val = ::write (udev, (char*) cmd, 8);
+
+	if (val < 0 && val !=8) {
+#if DEBUG_TRANZPORT
+		printf("write failed: %d\n", val);
+#endif
+		last_write_error = errno;
+		switch(last_write_error) {
+		case -ENOENT:
+		case -ENXIO:
+		case -ECONNRESET:
+		case -ESHUTDOWN: 
+		case -ENODEV: 
+			cerr << "Tranzport disconnected, errno: " << last_write_error;
+			set_active(false);
+			break;
+		case -ETIMEDOUT: // This is not normal but
+			cerr << "Tranzport disconnected, errno: " << last_write_error;
+			break;
+		default: 
+#if DEBUG_TRANZPORT
+			cerr << "Got an unknown error on read:" << last_write_error "\n";
+#endif
+			break;
+		}
+		return last_write_error;
+	}
+
+	last_write_error = 0;
+	++inflight;
+
+	return 0;
+
+}	
+
+int
+TranzportControlProtocol::write (uint8_t* cmd, uint32_t timeout_override)
+{
+	return (write_noretry(cmd,timeout_override));
+}	
+
+// FIXME - install poll semantics
+#endif /* HAVE_TRANZPORT_KERNEL_DRIVER */
+