Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / staging / comedi / comedi_usb.c

diff --git a/kernel/drivers/staging/comedi/comedi_usb.c b/kernel/drivers/staging/comedi/comedi_usb.c
new file mode 100644 (file)
index 0000000..68b75e8
--- /dev/null
+++ b/kernel/drivers/staging/comedi/comedi_usb.c
@@ -0,0 +1,131 @@
+/*
+ * comedi_usb.c
+ * Comedi USB driver specific functions.
+ *
+ * COMEDI - Linux Control and Measurement Device Interface
+ * Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+
+#include "comedi_usb.h"
+
+/**
+ * comedi_to_usb_interface() - comedi_device pointer to usb_interface pointer.
+ * @dev: comedi_device struct
+ */
+struct usb_interface *comedi_to_usb_interface(struct comedi_device *dev)
+{
+       return dev->hw_dev ? to_usb_interface(dev->hw_dev) : NULL;
+}
+EXPORT_SYMBOL_GPL(comedi_to_usb_interface);
+
+/**
+ * comedi_to_usb_dev() - comedi_device pointer to usb_device pointer.
+ * @dev: comedi_device struct
+ */
+struct usb_device *comedi_to_usb_dev(struct comedi_device *dev)
+{
+       struct usb_interface *intf = comedi_to_usb_interface(dev);
+
+       return intf ? interface_to_usbdev(intf) : NULL;
+}
+EXPORT_SYMBOL_GPL(comedi_to_usb_dev);
+
+/**
+ * comedi_usb_auto_config() - Configure/probe a comedi USB driver.
+ * @intf: usb_interface struct
+ * @driver: comedi_driver struct
+ * @context: driver specific data, passed to comedi_auto_config()
+ *
+ * Typically called from the usb_driver (*probe) function.
+ */
+int comedi_usb_auto_config(struct usb_interface *intf,
+                          struct comedi_driver *driver,
+                          unsigned long context)
+{
+       return comedi_auto_config(&intf->dev, driver, context);
+}
+EXPORT_SYMBOL_GPL(comedi_usb_auto_config);
+
+/**
+ * comedi_pci_auto_unconfig() - Unconfigure/disconnect a comedi USB driver.
+ * @intf: usb_interface struct
+ *
+ * Typically called from the usb_driver (*disconnect) function.
+ */
+void comedi_usb_auto_unconfig(struct usb_interface *intf)
+{
+       comedi_auto_unconfig(&intf->dev);
+}
+EXPORT_SYMBOL_GPL(comedi_usb_auto_unconfig);
+
+/**
+ * comedi_usb_driver_register() - Register a comedi USB driver.
+ * @comedi_driver: comedi_driver struct
+ * @usb_driver: usb_driver struct
+ *
+ * This function is used for the module_init() of comedi USB drivers.
+ * Do not call it directly, use the module_comedi_usb_driver() helper
+ * macro instead.
+ */
+int comedi_usb_driver_register(struct comedi_driver *comedi_driver,
+                              struct usb_driver *usb_driver)
+{
+       int ret;
+
+       ret = comedi_driver_register(comedi_driver);
+       if (ret < 0)
+               return ret;
+
+       ret = usb_register(usb_driver);
+       if (ret < 0) {
+               comedi_driver_unregister(comedi_driver);
+               return ret;
+       }
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(comedi_usb_driver_register);
+
+/**
+ * comedi_usb_driver_unregister() - Unregister a comedi USB driver.
+ * @comedi_driver: comedi_driver struct
+ * @usb_driver: usb_driver struct
+ *
+ * This function is used for the module_exit() of comedi USB drivers.
+ * Do not call it directly, use the module_comedi_usb_driver() helper
+ * macro instead.
+ */
+void comedi_usb_driver_unregister(struct comedi_driver *comedi_driver,
+                                 struct usb_driver *usb_driver)
+{
+       usb_deregister(usb_driver);
+       comedi_driver_unregister(comedi_driver);
+}
+EXPORT_SYMBOL_GPL(comedi_usb_driver_unregister);
+
+static int __init comedi_usb_init(void)
+{
+       return 0;
+}
+module_init(comedi_usb_init);
+
+static void __exit comedi_usb_exit(void)
+{
+}
+module_exit(comedi_usb_exit);
+
+MODULE_AUTHOR("http://www.comedi.org");
+MODULE_DESCRIPTION("Comedi USB interface module");
+MODULE_LICENSE("GPL");