diff options
Diffstat (limited to 'drivers/staging/comedi/comedi_usb.c')
-rw-r--r-- | drivers/staging/comedi/comedi_usb.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/staging/comedi/comedi_usb.c b/drivers/staging/comedi/comedi_usb.c new file mode 100644 index 000000000000..9d9716a248f1 --- /dev/null +++ b/drivers/staging/comedi/comedi_usb.c @@ -0,0 +1,108 @@ +/* + * 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. + * + * 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 <linux/usb.h> + +#include "comedidev.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_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); |