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/*
* 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.
*
* */
#include <iostream>
#define __STDC_FORMAT_MACROS
#include <inttypes.h>
#include <float.h>
#include <sys/time.h>
#include <errno.h>
#include <fcntl.h>
#include <tranzport_control_protocol.h>
#if !HAVE_TRANZPORT_KERNEL_DRIVER
using namespace ARDOUR;
using namespace std;
using namespace sigc;
using namespace PBD;
#include "i18n.h"
#include <pbd/abstract_ui.cc>
// I note that these usb specific open, close, probe, read routines are basically
// pure boilerplate and could easily be abstracted elsewhere
bool
TranzportControlProtocol::probe ()
{
struct usb_bus *bus;
struct usb_device *dev;
usb_init();
usb_find_busses();
usb_find_devices();
for (bus = usb_busses; bus; bus = bus->next) {
for(dev = bus->devices; dev; dev = dev->next) {
if (dev->descriptor.idVendor == VENDORID && dev->descriptor.idProduct == PRODUCTID) {
return true;
}
}
}
return false;
}
int
TranzportControlProtocol::open ()
{
struct usb_bus *bus;
struct usb_device *dev;
usb_init();
usb_find_busses();
usb_find_devices();
for (bus = usb_busses; bus; bus = bus->next) {
for(dev = bus->devices; dev; dev = dev->next) {
if (dev->descriptor.idVendor != VENDORID)
continue;
if (dev->descriptor.idProduct != PRODUCTID)
continue;
return open_core (dev);
}
}
cerr << _("Tranzport: no device detected") << endmsg;
return -1;
}
int
TranzportControlProtocol::open_core (struct usb_device* dev)
{
if (!(udev = usb_open (dev))) {
cerr << _("Tranzport: cannot open USB transport") << endmsg;
return -1;
}
if (usb_claim_interface (udev, 0) < 0) {
cerr << _("Tranzport: cannot claim USB interface") << endmsg;
usb_close (udev);
udev = 0;
return -1;
}
if (usb_set_configuration (udev, 1) < 0) {
cerr << _("Tranzport: cannot configure USB interface") << endmsg;
}
return 0;
}
int
TranzportControlProtocol::close ()
{
int ret = 0;
if (udev == 0) {
return 0;
}
if (usb_release_interface (udev, 0) < 0) {
cerr << _("Tranzport: cannot release interface") << endmsg;
ret = -1;
}
if (usb_close (udev)) {
cerr << _("Tranzport: cannot close device") << endmsg;
udev = 0;
ret = 0;
}
return ret;
}
int TranzportControlProtocol::read(uint8_t *buf, uint32_t timeout_override)
{
last_read_error = usb_interrupt_read (udev, READ_ENDPOINT, (char *) buf, 8, timeout_override);
switch(last_read_error) {
case -ENOENT:
case -ENXIO:
case -ECONNRESET:
case -ESHUTDOWN:
case -ENODEV:
cerr << "Tranzport disconnected, errno: " << last_read_error;
set_active(false);
case -ETIMEDOUT: // This is normal
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)
{
int val;
if(inflight > MAX_TRANZPORT_INFLIGHT) { return (-1); }
val = usb_interrupt_write (udev, WRITE_ENDPOINT, (char*) cmd, 8, timeout_override ? timeout_override : timeout);
if (val < 0 && val !=8) {
#if DEBUG_TRANZPORT
printf("usb_interrupt_write failed: %d\n", val);
#endif
last_write_error = val;
switch(last_write_error) {
case -ENOENT:
case -ENXIO:
case -ECONNRESET:
case -ESHUTDOWN:
case -ENODEV:
cerr << "Tranzport disconnected, errno: " << last_write_error;
set_active(false);
case -ETIMEDOUT: // This is normal
break;
default:
#if DEBUG_TRANZPORT
cerr << "Got an unknown error on read:" << last_write_error "\n";
#endif
break;
}
return val;
}
last_write_error = 0;
++inflight;
return 0;
}
int
TranzportControlProtocol::write (uint8_t* cmd, uint32_t timeout_override)
{
#if MAX_RETRY > 1
int val;
int retry = 0;
if(inflight > MAX_TRANZPORT_INFLIGHT) { return (-1); }
while((val = usb_interrupt_write (udev, WRITE_ENDPOINT, (char*) cmd, 8, timeout_override ? timeout_override : timeout))!=8 && retry++ < MAX_RETRY) {
printf("usb_interrupt_write failed, retrying: %d\n", val);
}
if (retry == MAX_RETRY) {
printf("Too many retries on a tranzport write, aborting\n");
}
if (val < 0) {
printf("usb_interrupt_write failed: %d\n", val);
return val;
}
if (val != 8) {
printf("usb_interrupt_write failed: %d\n", val);
return -1;
}
++inflight;
return 0;
#else
return (write_noretry(cmd,timeout_override));
#endif
}
#endif
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