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72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
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/*****************************************************************************
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* File: drivers/usb/misc/vstusb.h
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*
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* Purpose: Support for the bulk USB Vernier Spectrophotometers
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*
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* Author: EQware Engineering, Inc.
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* Oregon City, OR, USA 97045
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*
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* Copyright: 2007, 2008
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* Vernier Software & Technology
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* Beaverton, OR, USA 97005
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*
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* Web: www.vernier.com
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*****************************************************************************/
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/*****************************************************************************
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*
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* The vstusb module is a standard usb 'client' driver running on top of the
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* standard usb host controller stack.
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*
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* In general, vstusb supports standard bulk usb pipes. It supports multiple
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* devices and multiple pipes per device.
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*
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* The vstusb driver supports two interfaces:
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* 1 - ioctl SEND_PIPE/RECV_PIPE - a general bulk write/read msg
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* interface to any pipe with timeout support;
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* 2 - standard read/write with ioctl config - offers standard read/write
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* interface with ioctl configured pipes and timeouts.
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*
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* Both interfaces can be signal from other process and will abort its i/o
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* operation.
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*
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* A timeout of 0 means NO timeout. The user can still terminate the read via
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* signal.
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*
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* If using multiple threads with this driver, the user should ensure that
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* any reads, writes, or ioctls are complete before closing the device.
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* Changing read/write timeouts or pipes takes effect on next read/write.
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*
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*****************************************************************************/
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struct vstusb_args {
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union {
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/* this struct is used for IOCTL_VSTUSB_SEND_PIPE, *
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* IOCTL_VSTUSB_RECV_PIPE, and read()/write() fops */
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struct {
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void __user *buffer;
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size_t count;
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unsigned int timeout_ms;
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int pipe;
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};
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/* this one is used for IOCTL_VSTUSB_CONFIG_RW */
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struct {
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int rd_pipe;
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int rd_timeout_ms;
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int wr_pipe;
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int wr_timeout_ms;
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};
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};
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};
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#define VST_IOC_MAGIC 'L'
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#define VST_IOC_FIRST 0x20
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#define IOCTL_VSTUSB_SEND_PIPE _IO(VST_IOC_MAGIC, VST_IOC_FIRST)
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#define IOCTL_VSTUSB_RECV_PIPE _IO(VST_IOC_MAGIC, VST_IOC_FIRST + 1)
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#define IOCTL_VSTUSB_CONFIG_RW _IO(VST_IOC_MAGIC, VST_IOC_FIRST + 2)
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