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Background: When performing a read on an instrument that is executing a function that runs longer than the USB timeout the instrument may hang and require a device reset to recover. The READ_STATUS_BYTE operation always returns even when the instrument is busy permitting to poll for the appropriate condition. This capability is referred to in instrument application notes on synchronizing acquisitions for other platforms. Signed-off-by: Dave Penkler <dpenkler@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
45 lines
1.7 KiB
C
45 lines
1.7 KiB
C
/*
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* Copyright (C) 2007 Stefan Kopp, Gechingen, Germany
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* Copyright (C) 2008 Novell, Inc.
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* Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
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*
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* This file holds USB constants defined by the USB Device Class
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* Definition for Test and Measurement devices published by the USB-IF.
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*
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* It also has the ioctl definitions for the usbtmc kernel driver that
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* userspace needs to know about.
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*/
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#ifndef __LINUX_USB_TMC_H
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#define __LINUX_USB_TMC_H
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/* USB TMC status values */
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#define USBTMC_STATUS_SUCCESS 0x01
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#define USBTMC_STATUS_PENDING 0x02
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#define USBTMC_STATUS_FAILED 0x80
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#define USBTMC_STATUS_TRANSFER_NOT_IN_PROGRESS 0x81
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#define USBTMC_STATUS_SPLIT_NOT_IN_PROGRESS 0x82
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#define USBTMC_STATUS_SPLIT_IN_PROGRESS 0x83
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/* USB TMC requests values */
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#define USBTMC_REQUEST_INITIATE_ABORT_BULK_OUT 1
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#define USBTMC_REQUEST_CHECK_ABORT_BULK_OUT_STATUS 2
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#define USBTMC_REQUEST_INITIATE_ABORT_BULK_IN 3
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#define USBTMC_REQUEST_CHECK_ABORT_BULK_IN_STATUS 4
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#define USBTMC_REQUEST_INITIATE_CLEAR 5
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#define USBTMC_REQUEST_CHECK_CLEAR_STATUS 6
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#define USBTMC_REQUEST_GET_CAPABILITIES 7
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#define USBTMC_REQUEST_INDICATOR_PULSE 64
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#define USBTMC488_REQUEST_READ_STATUS_BYTE 128
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/* Request values for USBTMC driver's ioctl entry point */
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#define USBTMC_IOC_NR 91
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#define USBTMC_IOCTL_INDICATOR_PULSE _IO(USBTMC_IOC_NR, 1)
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#define USBTMC_IOCTL_CLEAR _IO(USBTMC_IOC_NR, 2)
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#define USBTMC_IOCTL_ABORT_BULK_OUT _IO(USBTMC_IOC_NR, 3)
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#define USBTMC_IOCTL_ABORT_BULK_IN _IO(USBTMC_IOC_NR, 4)
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#define USBTMC_IOCTL_CLEAR_OUT_HALT _IO(USBTMC_IOC_NR, 6)
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#define USBTMC_IOCTL_CLEAR_IN_HALT _IO(USBTMC_IOC_NR, 7)
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#define USBTMC488_IOCTL_READ_STB _IOR(USBTMC_IOC_NR, 18, unsigned char)
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#endif
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