zig

comedi.h (55480B) - Raw

---

 /* SPDX-License-Identifier: LGPL-2.0+ WITH Linux-syscall-note */
 /*
  * comedi.h
  * header file for COMEDI user API
  *
  * COMEDI - Linux Control and Measurement Device Interface
  * Copyright (C) 1998-2001 David A. Schleef <ds@schleef.org>
  */
 
 #ifndef _COMEDI_H
 #define _COMEDI_H
 
 #define COMEDI_MAJORVERSION	0
 #define COMEDI_MINORVERSION	7
 #define COMEDI_MICROVERSION	76
 #define VERSION	"0.7.76"
 
 /* comedi's major device number */
 #define COMEDI_MAJOR 98
 
 /*
  * maximum number of minor devices.  This can be increased, although
  * kernel structures are currently statically allocated, thus you
  * don't want this to be much more than you actually use.
  */
 #define COMEDI_NDEVICES 16
 
 /* number of config options in the config structure */
 #define COMEDI_NDEVCONFOPTS 32
 
 /*
  * NOTE: 'comedi_config --init-data' is deprecated
  *
  * The following indexes in the config options were used by
  * comedi_config to pass firmware blobs from user space to the
  * comedi drivers. The request_firmware() hotplug interface is
  * now used by all comedi drivers instead.
  */
 
 /* length of nth chunk of firmware data -*/
 #define COMEDI_DEVCONF_AUX_DATA3_LENGTH		25
 #define COMEDI_DEVCONF_AUX_DATA2_LENGTH		26
 #define COMEDI_DEVCONF_AUX_DATA1_LENGTH		27
 #define COMEDI_DEVCONF_AUX_DATA0_LENGTH		28
 /* most significant 32 bits of pointer address (if needed) */
 #define COMEDI_DEVCONF_AUX_DATA_HI		29
 /* least significant 32 bits of pointer address */
 #define COMEDI_DEVCONF_AUX_DATA_LO		30
 #define COMEDI_DEVCONF_AUX_DATA_LENGTH		31	/* total data length */
 
 /* max length of device and driver names */
 #define COMEDI_NAMELEN 20
 
 /* packs and unpacks a channel/range number */
 
 #define CR_PACK(chan, rng, aref)					\
 	((((aref) & 0x3) << 24) | (((rng) & 0xff) << 16) | (chan))
 #define CR_PACK_FLAGS(chan, range, aref, flags)				\
 	(CR_PACK(chan, range, aref) | ((flags) & CR_FLAGS_MASK))
 
 #define CR_CHAN(a)	((a) & 0xffff)
 #define CR_RANGE(a)	(((a) >> 16) & 0xff)
 #define CR_AREF(a)	(((a) >> 24) & 0x03)
 
 #define CR_FLAGS_MASK	0xfc000000
 #define CR_ALT_FILTER	0x04000000
 #define CR_DITHER	CR_ALT_FILTER
 #define CR_DEGLITCH	CR_ALT_FILTER
 #define CR_ALT_SOURCE	0x08000000
 #define CR_EDGE		0x40000000
 #define CR_INVERT	0x80000000
 
 #define AREF_GROUND	0x00	/* analog ref = analog ground */
 #define AREF_COMMON	0x01	/* analog ref = analog common */
 #define AREF_DIFF	0x02	/* analog ref = differential */
 #define AREF_OTHER	0x03	/* analog ref = other (undefined) */
 
 /* counters -- these are arbitrary values */
 #define GPCT_RESET		0x0001
 #define GPCT_SET_SOURCE		0x0002
 #define GPCT_SET_GATE		0x0004
 #define GPCT_SET_DIRECTION	0x0008
 #define GPCT_SET_OPERATION	0x0010
 #define GPCT_ARM		0x0020
 #define GPCT_DISARM		0x0040
 #define GPCT_GET_INT_CLK_FRQ	0x0080
 
 #define GPCT_INT_CLOCK		0x0001
 #define GPCT_EXT_PIN		0x0002
 #define GPCT_NO_GATE		0x0004
 #define GPCT_UP			0x0008
 #define GPCT_DOWN		0x0010
 #define GPCT_HWUD		0x0020
 #define GPCT_SIMPLE_EVENT	0x0040
 #define GPCT_SINGLE_PERIOD	0x0080
 #define GPCT_SINGLE_PW		0x0100
 #define GPCT_CONT_PULSE_OUT	0x0200
 #define GPCT_SINGLE_PULSE_OUT	0x0400
 
 /* instructions */
 
 #define INSN_MASK_WRITE		0x8000000
 #define INSN_MASK_READ		0x4000000
 #define INSN_MASK_SPECIAL	0x2000000
 
 #define INSN_READ		(0 | INSN_MASK_READ)
 #define INSN_WRITE		(1 | INSN_MASK_WRITE)
 #define INSN_BITS		(2 | INSN_MASK_READ | INSN_MASK_WRITE)
 #define INSN_CONFIG		(3 | INSN_MASK_READ | INSN_MASK_WRITE)
 #define INSN_DEVICE_CONFIG	(INSN_CONFIG | INSN_MASK_SPECIAL)
 #define INSN_GTOD		(4 | INSN_MASK_READ | INSN_MASK_SPECIAL)
 #define INSN_WAIT		(5 | INSN_MASK_WRITE | INSN_MASK_SPECIAL)
 #define INSN_INTTRIG		(6 | INSN_MASK_WRITE | INSN_MASK_SPECIAL)
 
 /* command flags */
 /* These flags are used in comedi_cmd structures */
 
 #define CMDF_BOGUS		0x00000001	/* do the motions */
 
 /* try to use a real-time interrupt while performing command */
 #define CMDF_PRIORITY		0x00000008
 
 /* wake up on end-of-scan events */
 #define CMDF_WAKE_EOS		0x00000020
 
 #define CMDF_WRITE		0x00000040
 
 #define CMDF_RAWDATA		0x00000080
 
 /* timer rounding definitions */
 #define CMDF_ROUND_MASK		0x00030000
 #define CMDF_ROUND_NEAREST	0x00000000
 #define CMDF_ROUND_DOWN		0x00010000
 #define CMDF_ROUND_UP		0x00020000
 #define CMDF_ROUND_UP_NEXT	0x00030000
 
 #define COMEDI_EV_START		0x00040000
 #define COMEDI_EV_SCAN_BEGIN	0x00080000
 #define COMEDI_EV_CONVERT	0x00100000
 #define COMEDI_EV_SCAN_END	0x00200000
 #define COMEDI_EV_STOP		0x00400000
 
 /* compatibility definitions */
 #define TRIG_BOGUS		CMDF_BOGUS
 #define TRIG_RT			CMDF_PRIORITY
 #define TRIG_WAKE_EOS		CMDF_WAKE_EOS
 #define TRIG_WRITE		CMDF_WRITE
 #define TRIG_ROUND_MASK		CMDF_ROUND_MASK
 #define TRIG_ROUND_NEAREST	CMDF_ROUND_NEAREST
 #define TRIG_ROUND_DOWN		CMDF_ROUND_DOWN
 #define TRIG_ROUND_UP		CMDF_ROUND_UP
 #define TRIG_ROUND_UP_NEXT	CMDF_ROUND_UP_NEXT
 
 /* trigger sources */
 
 #define TRIG_ANY	0xffffffff
 #define TRIG_INVALID	0x00000000
 
 #define TRIG_NONE	0x00000001 /* never trigger */
 #define TRIG_NOW	0x00000002 /* trigger now + N ns */
 #define TRIG_FOLLOW	0x00000004 /* trigger on next lower level trig */
 #define TRIG_TIME	0x00000008 /* trigger at time N ns */
 #define TRIG_TIMER	0x00000010 /* trigger at rate N ns */
 #define TRIG_COUNT	0x00000020 /* trigger when count reaches N */
 #define TRIG_EXT	0x00000040 /* trigger on external signal N */
 #define TRIG_INT	0x00000080 /* trigger on comedi-internal signal N */
 #define TRIG_OTHER	0x00000100 /* driver defined */
 
 /* subdevice flags */
 
 #define SDF_BUSY	0x0001	/* device is busy */
 #define SDF_BUSY_OWNER	0x0002	/* device is busy with your job */
 #define SDF_LOCKED	0x0004	/* subdevice is locked */
 #define SDF_LOCK_OWNER	0x0008	/* you own lock */
 #define SDF_MAXDATA	0x0010	/* maxdata depends on channel */
 #define SDF_FLAGS	0x0020	/* flags depend on channel */
 #define SDF_RANGETYPE	0x0040	/* range type depends on channel */
 #define SDF_PWM_COUNTER 0x0080	/* PWM can automatically switch off */
 #define SDF_PWM_HBRIDGE 0x0100	/* PWM is signed (H-bridge) */
 #define SDF_CMD		0x1000	/* can do commands (deprecated) */
 #define SDF_SOFT_CALIBRATED	0x2000 /* subdevice uses software calibration */
 #define SDF_CMD_WRITE		0x4000 /* can do output commands */
 #define SDF_CMD_READ		0x8000 /* can do input commands */
 
 /* subdevice can be read (e.g. analog input) */
 #define SDF_READABLE	0x00010000
 /* subdevice can be written (e.g. analog output) */
 #define SDF_WRITABLE	0x00020000
 #define SDF_WRITEABLE	SDF_WRITABLE	/* spelling error in API */
 /* subdevice does not have externally visible lines */
 #define SDF_INTERNAL	0x00040000
 #define SDF_GROUND	0x00100000	/* can do aref=ground */
 #define SDF_COMMON	0x00200000	/* can do aref=common */
 #define SDF_DIFF	0x00400000	/* can do aref=diff */
 #define SDF_OTHER	0x00800000	/* can do aref=other */
 #define SDF_DITHER	0x01000000	/* can do dithering */
 #define SDF_DEGLITCH	0x02000000	/* can do deglitching */
 #define SDF_MMAP	0x04000000	/* can do mmap() */
 #define SDF_RUNNING	0x08000000	/* subdevice is acquiring data */
 #define SDF_LSAMPL	0x10000000	/* subdevice uses 32-bit samples */
 #define SDF_PACKED	0x20000000	/* subdevice can do packed DIO */
 
 /* subdevice types */
 
 /**
  * enum comedi_subdevice_type - COMEDI subdevice types
  * @COMEDI_SUBD_UNUSED:		Unused subdevice.
  * @COMEDI_SUBD_AI:		Analog input.
  * @COMEDI_SUBD_AO:		Analog output.
  * @COMEDI_SUBD_DI:		Digital input.
  * @COMEDI_SUBD_DO:		Digital output.
  * @COMEDI_SUBD_DIO:		Digital input/output.
  * @COMEDI_SUBD_COUNTER:	Counter.
  * @COMEDI_SUBD_TIMER:		Timer.
  * @COMEDI_SUBD_MEMORY:		Memory, EEPROM, DPRAM.
  * @COMEDI_SUBD_CALIB:		Calibration DACs.
  * @COMEDI_SUBD_PROC:		Processor, DSP.
  * @COMEDI_SUBD_SERIAL:		Serial I/O.
  * @COMEDI_SUBD_PWM:		Pulse-Width Modulation output.
  */
 enum comedi_subdevice_type {
 	COMEDI_SUBD_UNUSED,
 	COMEDI_SUBD_AI,
 	COMEDI_SUBD_AO,
 	COMEDI_SUBD_DI,
 	COMEDI_SUBD_DO,
 	COMEDI_SUBD_DIO,
 	COMEDI_SUBD_COUNTER,
 	COMEDI_SUBD_TIMER,
 	COMEDI_SUBD_MEMORY,
 	COMEDI_SUBD_CALIB,
 	COMEDI_SUBD_PROC,
 	COMEDI_SUBD_SERIAL,
 	COMEDI_SUBD_PWM
 };
 
 /* configuration instructions */
 
 /**
  * enum comedi_io_direction - COMEDI I/O directions
  * @COMEDI_INPUT:	Input.
  * @COMEDI_OUTPUT:	Output.
  * @COMEDI_OPENDRAIN:	Open-drain (or open-collector) output.
  *
  * These are used by the %INSN_CONFIG_DIO_QUERY configuration instruction to
  * report a direction.  They may also be used in other places where a direction
  * needs to be specified.
  */
 enum comedi_io_direction {
 	COMEDI_INPUT = 0,
 	COMEDI_OUTPUT = 1,
 	COMEDI_OPENDRAIN = 2
 };
 
 /**
  * enum configuration_ids - COMEDI configuration instruction codes
  * @INSN_CONFIG_DIO_INPUT:	Configure digital I/O as input.
  * @INSN_CONFIG_DIO_OUTPUT:	Configure digital I/O as output.
  * @INSN_CONFIG_DIO_OPENDRAIN:	Configure digital I/O as open-drain (or open
  *				collector) output.
  * @INSN_CONFIG_ANALOG_TRIG:	Configure analog trigger.
  * @INSN_CONFIG_ALT_SOURCE:	Configure alternate input source.
  * @INSN_CONFIG_DIGITAL_TRIG:	Configure digital trigger.
  * @INSN_CONFIG_BLOCK_SIZE:	Configure block size for DMA transfers.
  * @INSN_CONFIG_TIMER_1:	Configure divisor for external clock.
  * @INSN_CONFIG_FILTER:		Configure a filter.
  * @INSN_CONFIG_CHANGE_NOTIFY:	Configure change notification for digital
  *				inputs.  (New drivers should use
  *				%INSN_CONFIG_DIGITAL_TRIG instead.)
  * @INSN_CONFIG_SERIAL_CLOCK:	Configure clock for serial I/O.
  * @INSN_CONFIG_BIDIRECTIONAL_DATA: Send and receive byte over serial I/O.
  * @INSN_CONFIG_DIO_QUERY:	Query direction of digital I/O channel.
  * @INSN_CONFIG_PWM_OUTPUT:	Configure pulse-width modulator output.
  * @INSN_CONFIG_GET_PWM_OUTPUT:	Get pulse-width modulator output configuration.
  * @INSN_CONFIG_ARM:		Arm a subdevice or channel.
  * @INSN_CONFIG_DISARM:		Disarm a subdevice or channel.
  * @INSN_CONFIG_GET_COUNTER_STATUS: Get counter status.
  * @INSN_CONFIG_RESET:		Reset a subdevice or channel.
  * @INSN_CONFIG_GPCT_SINGLE_PULSE_GENERATOR: Configure counter/timer as
  *				single pulse generator.
  * @INSN_CONFIG_GPCT_PULSE_TRAIN_GENERATOR: Configure counter/timer as
  *				pulse train generator.
  * @INSN_CONFIG_GPCT_QUADRATURE_ENCODER: Configure counter as a quadrature
  *				encoder.
  * @INSN_CONFIG_SET_GATE_SRC:	Set counter/timer gate source.
  * @INSN_CONFIG_GET_GATE_SRC:	Get counter/timer gate source.
  * @INSN_CONFIG_SET_CLOCK_SRC:	Set counter/timer master clock source.
  * @INSN_CONFIG_GET_CLOCK_SRC:	Get counter/timer master clock source.
  * @INSN_CONFIG_SET_OTHER_SRC:	Set counter/timer "other" source.
  * @INSN_CONFIG_GET_HARDWARE_BUFFER_SIZE: Get size (in bytes) of subdevice's
  *				on-board FIFOs used during streaming
  *				input/output.
  * @INSN_CONFIG_SET_COUNTER_MODE: Set counter/timer mode.
  * @INSN_CONFIG_8254_SET_MODE:	(Deprecated) Same as
  *				%INSN_CONFIG_SET_COUNTER_MODE.
  * @INSN_CONFIG_8254_READ_STATUS: Read status of 8254 counter channel.
  * @INSN_CONFIG_SET_ROUTING:	Set routing for a channel.
  * @INSN_CONFIG_GET_ROUTING:	Get routing for a channel.
  * @INSN_CONFIG_PWM_SET_PERIOD: Set PWM period in nanoseconds.
  * @INSN_CONFIG_PWM_GET_PERIOD: Get PWM period in nanoseconds.
  * @INSN_CONFIG_GET_PWM_STATUS: Get PWM status.
  * @INSN_CONFIG_PWM_SET_H_BRIDGE: Set PWM H bridge duty cycle and polarity for
  *				a relay simultaneously.
  * @INSN_CONFIG_PWM_GET_H_BRIDGE: Get PWM H bridge duty cycle and polarity.
  * @INSN_CONFIG_GET_CMD_TIMING_CONSTRAINTS: Get the hardware timing restraints,
  *				regardless of trigger sources.
  */
 enum configuration_ids {
 	INSN_CONFIG_DIO_INPUT = COMEDI_INPUT,
 	INSN_CONFIG_DIO_OUTPUT = COMEDI_OUTPUT,
 	INSN_CONFIG_DIO_OPENDRAIN = COMEDI_OPENDRAIN,
 	INSN_CONFIG_ANALOG_TRIG = 16,
 /*	INSN_CONFIG_WAVEFORM = 17, */
 /*	INSN_CONFIG_TRIG = 18, */
 /*	INSN_CONFIG_COUNTER = 19, */
 	INSN_CONFIG_ALT_SOURCE = 20,
 	INSN_CONFIG_DIGITAL_TRIG = 21,
 	INSN_CONFIG_BLOCK_SIZE = 22,
 	INSN_CONFIG_TIMER_1 = 23,
 	INSN_CONFIG_FILTER = 24,
 	INSN_CONFIG_CHANGE_NOTIFY = 25,
 
 	INSN_CONFIG_SERIAL_CLOCK = 26,	/*ALPHA*/
 	INSN_CONFIG_BIDIRECTIONAL_DATA = 27,
 	INSN_CONFIG_DIO_QUERY = 28,
 	INSN_CONFIG_PWM_OUTPUT = 29,
 	INSN_CONFIG_GET_PWM_OUTPUT = 30,
 	INSN_CONFIG_ARM = 31,
 	INSN_CONFIG_DISARM = 32,
 	INSN_CONFIG_GET_COUNTER_STATUS = 33,
 	INSN_CONFIG_RESET = 34,
 	INSN_CONFIG_GPCT_SINGLE_PULSE_GENERATOR = 1001,
 	INSN_CONFIG_GPCT_PULSE_TRAIN_GENERATOR = 1002,
 	INSN_CONFIG_GPCT_QUADRATURE_ENCODER = 1003,
 	INSN_CONFIG_SET_GATE_SRC = 2001,
 	INSN_CONFIG_GET_GATE_SRC = 2002,
 	INSN_CONFIG_SET_CLOCK_SRC = 2003,
 	INSN_CONFIG_GET_CLOCK_SRC = 2004,
 	INSN_CONFIG_SET_OTHER_SRC = 2005,
 	INSN_CONFIG_GET_HARDWARE_BUFFER_SIZE = 2006,
 	INSN_CONFIG_SET_COUNTER_MODE = 4097,
 	INSN_CONFIG_8254_SET_MODE = INSN_CONFIG_SET_COUNTER_MODE,
 	INSN_CONFIG_8254_READ_STATUS = 4098,
 	INSN_CONFIG_SET_ROUTING = 4099,
 	INSN_CONFIG_GET_ROUTING = 4109,
 	INSN_CONFIG_PWM_SET_PERIOD = 5000,
 	INSN_CONFIG_PWM_GET_PERIOD = 5001,
 	INSN_CONFIG_GET_PWM_STATUS = 5002,
 	INSN_CONFIG_PWM_SET_H_BRIDGE = 5003,
 	INSN_CONFIG_PWM_GET_H_BRIDGE = 5004,
 	INSN_CONFIG_GET_CMD_TIMING_CONSTRAINTS = 5005,
 };
 
 /**
  * enum device_configuration_ids - COMEDI configuration instruction codes global
  * to an entire device.
  * @INSN_DEVICE_CONFIG_TEST_ROUTE:	Validate the possibility of a
  *					globally-named route
  * @INSN_DEVICE_CONFIG_CONNECT_ROUTE:	Connect a globally-named route
  * @INSN_DEVICE_CONFIG_DISCONNECT_ROUTE:Disconnect a globally-named route
  * @INSN_DEVICE_CONFIG_GET_ROUTES:	Get a list of all globally-named routes
  *					that are valid for a particular device.
  */
 enum device_config_route_ids {
 	INSN_DEVICE_CONFIG_TEST_ROUTE = 0,
 	INSN_DEVICE_CONFIG_CONNECT_ROUTE = 1,
 	INSN_DEVICE_CONFIG_DISCONNECT_ROUTE = 2,
 	INSN_DEVICE_CONFIG_GET_ROUTES = 3,
 };
 
 /**
  * enum comedi_digital_trig_op - operations for configuring a digital trigger
  * @COMEDI_DIGITAL_TRIG_DISABLE:	Return digital trigger to its default,
  *					inactive, unconfigured state.
  * @COMEDI_DIGITAL_TRIG_ENABLE_EDGES:	Set rising and/or falling edge inputs
  *					that each can fire the trigger.
  * @COMEDI_DIGITAL_TRIG_ENABLE_LEVELS:	Set a combination of high and/or low
  *					level inputs that can fire the trigger.
  *
  * These are used with the %INSN_CONFIG_DIGITAL_TRIG configuration instruction.
  * The data for the configuration instruction is as follows...
  *
  *   data[%0] = %INSN_CONFIG_DIGITAL_TRIG
  *
  *   data[%1] = trigger ID
  *
  *   data[%2] = configuration operation
  *
  *   data[%3] = configuration parameter 1
  *
  *   data[%4] = configuration parameter 2
  *
  *   data[%5] = configuration parameter 3
  *
  * The trigger ID (data[%1]) is used to differentiate multiple digital triggers
  * belonging to the same subdevice.  The configuration operation (data[%2]) is
  * one of the enum comedi_digital_trig_op values.  The configuration
  * parameters (data[%3], data[%4], and data[%5]) depend on the operation; they
  * are not used with %COMEDI_DIGITAL_TRIG_DISABLE.
  *
  * For %COMEDI_DIGITAL_TRIG_ENABLE_EDGES and %COMEDI_DIGITAL_TRIG_ENABLE_LEVELS,
  * configuration parameter 1 (data[%3]) contains a "left-shift" value that
  * specifies the input corresponding to bit 0 of configuration parameters 2
  * and 3.  This is useful if the trigger has more than 32 inputs.
  *
  * For %COMEDI_DIGITAL_TRIG_ENABLE_EDGES, configuration parameter 2 (data[%4])
  * specifies which of up to 32 inputs have rising-edge sensitivity, and
  * configuration parameter 3 (data[%5]) specifies which of up to 32 inputs
  * have falling-edge sensitivity that can fire the trigger.
  *
  * For %COMEDI_DIGITAL_TRIG_ENABLE_LEVELS, configuration parameter 2 (data[%4])
  * specifies which of up to 32 inputs must be at a high level, and
  * configuration parameter 3 (data[%5]) specifies which of up to 32 inputs
  * must be at a low level for the trigger to fire.
  *
  * Some sequences of %INSN_CONFIG_DIGITAL_TRIG instructions may have a (partly)
  * accumulative effect, depending on the low-level driver.  This is useful
  * when setting up a trigger that has more than 32 inputs, or has a combination
  * of edge- and level-triggered inputs.
  */
 enum comedi_digital_trig_op {
 	COMEDI_DIGITAL_TRIG_DISABLE = 0,
 	COMEDI_DIGITAL_TRIG_ENABLE_EDGES = 1,
 	COMEDI_DIGITAL_TRIG_ENABLE_LEVELS = 2
 };
 
 /**
  * enum comedi_support_level - support level for a COMEDI feature
  * @COMEDI_UNKNOWN_SUPPORT:	Unspecified support for feature.
  * @COMEDI_SUPPORTED:		Feature is supported.
  * @COMEDI_UNSUPPORTED:		Feature is unsupported.
  */
 enum comedi_support_level {
 	COMEDI_UNKNOWN_SUPPORT = 0,
 	COMEDI_SUPPORTED,
 	COMEDI_UNSUPPORTED
 };
 
 /**
  * enum comedi_counter_status_flags - counter status bits
  * @COMEDI_COUNTER_ARMED:		Counter is armed.
  * @COMEDI_COUNTER_COUNTING:		Counter is counting.
  * @COMEDI_COUNTER_TERMINAL_COUNT:	Counter reached terminal count.
  *
  * These bitwise values are used by the %INSN_CONFIG_GET_COUNTER_STATUS
  * configuration instruction to report the status of a counter.
  */
 enum comedi_counter_status_flags {
 	COMEDI_COUNTER_ARMED = 0x1,
 	COMEDI_COUNTER_COUNTING = 0x2,
 	COMEDI_COUNTER_TERMINAL_COUNT = 0x4,
 };
 
 /* ioctls */
 
 #define CIO 'd'
 #define COMEDI_DEVCONFIG _IOW(CIO, 0, struct comedi_devconfig)
 #define COMEDI_DEVINFO _IOR(CIO, 1, struct comedi_devinfo)
 #define COMEDI_SUBDINFO _IOR(CIO, 2, struct comedi_subdinfo)
 #define COMEDI_CHANINFO _IOR(CIO, 3, struct comedi_chaninfo)
 /* _IOWR(CIO, 4, ...) is reserved */
 #define COMEDI_LOCK _IO(CIO, 5)
 #define COMEDI_UNLOCK _IO(CIO, 6)
 #define COMEDI_CANCEL _IO(CIO, 7)
 #define COMEDI_RANGEINFO _IOR(CIO, 8, struct comedi_rangeinfo)
 #define COMEDI_CMD _IOR(CIO, 9, struct comedi_cmd)
 #define COMEDI_CMDTEST _IOR(CIO, 10, struct comedi_cmd)
 #define COMEDI_INSNLIST _IOR(CIO, 11, struct comedi_insnlist)
 #define COMEDI_INSN _IOR(CIO, 12, struct comedi_insn)
 #define COMEDI_BUFCONFIG _IOR(CIO, 13, struct comedi_bufconfig)
 #define COMEDI_BUFINFO _IOWR(CIO, 14, struct comedi_bufinfo)
 #define COMEDI_POLL _IO(CIO, 15)
 #define COMEDI_SETRSUBD _IO(CIO, 16)
 #define COMEDI_SETWSUBD _IO(CIO, 17)
 
 /* structures */
 
 /**
  * struct comedi_insn - COMEDI instruction
  * @insn:	COMEDI instruction type (%INSN_xxx).
  * @n:		Length of @data[].
  * @data:	Pointer to data array operated on by the instruction.
  * @subdev:	Subdevice index.
  * @chanspec:	A packed "chanspec" value consisting of channel number,
  *		analog range index, analog reference type, and flags.
  * @unused:	Reserved for future use.
  *
  * This is used with the %COMEDI_INSN ioctl, and indirectly with the
  * %COMEDI_INSNLIST ioctl.
  */
 struct comedi_insn {
 	unsigned int insn;
 	unsigned int n;
 	unsigned int *data;
 	unsigned int subdev;
 	unsigned int chanspec;
 	unsigned int unused[3];
 };
 
 /**
  * struct comedi_insnlist - list of COMEDI instructions
  * @n_insns:	Number of COMEDI instructions.
  * @insns:	Pointer to array COMEDI instructions.
  *
  * This is used with the %COMEDI_INSNLIST ioctl.
  */
 struct comedi_insnlist {
 	unsigned int n_insns;
 	struct comedi_insn *insns;
 };
 
 /**
  * struct comedi_cmd - COMEDI asynchronous acquisition command details
  * @subdev:		Subdevice index.
  * @flags:		Command flags (%CMDF_xxx).
  * @start_src:		"Start acquisition" trigger source (%TRIG_xxx).
  * @start_arg:		"Start acquisition" trigger argument.
  * @scan_begin_src:	"Scan begin" trigger source.
  * @scan_begin_arg:	"Scan begin" trigger argument.
  * @convert_src:	"Convert" trigger source.
  * @convert_arg:	"Convert" trigger argument.
  * @scan_end_src:	"Scan end" trigger source.
  * @scan_end_arg:	"Scan end" trigger argument.
  * @stop_src:		"Stop acquisition" trigger source.
  * @stop_arg:		"Stop acquisition" trigger argument.
  * @chanlist:		Pointer to array of "chanspec" values, containing a
  *			sequence of channel numbers packed with analog range
  *			index, etc.
  * @chanlist_len:	Number of channels in sequence.
  * @data:		Pointer to miscellaneous set-up data (not used).
  * @data_len:		Length of miscellaneous set-up data.
  *
  * This is used with the %COMEDI_CMD or %COMEDI_CMDTEST ioctl to set-up
  * or validate an asynchronous acquisition command.  The ioctl may modify
  * the &struct comedi_cmd and copy it back to the caller.
  *
  * Optional command @flags values that can be ORed together...
  *
  * %CMDF_BOGUS - makes %COMEDI_CMD ioctl return error %EAGAIN instead of
  * starting the command.
  *
  * %CMDF_PRIORITY - requests "hard real-time" processing (which is not
  * supported in this version of COMEDI).
  *
  * %CMDF_WAKE_EOS - requests the command makes data available for reading
  * after every "scan" period.
  *
  * %CMDF_WRITE - marks the command as being in the "write" (to device)
  * direction.  This does not need to be specified by the caller unless the
  * subdevice supports commands in either direction.
  *
  * %CMDF_RAWDATA - prevents the command from "munging" the data between the
  * COMEDI sample format and the raw hardware sample format.
  *
  * %CMDF_ROUND_NEAREST - requests timing periods to be rounded to nearest
  * supported values.
  *
  * %CMDF_ROUND_DOWN - requests timing periods to be rounded down to supported
  * values (frequencies rounded up).
  *
  * %CMDF_ROUND_UP - requests timing periods to be rounded up to supported
  * values (frequencies rounded down).
  *
  * Trigger source values for @start_src, @scan_begin_src, @convert_src,
  * @scan_end_src, and @stop_src...
  *
  * %TRIG_ANY - "all ones" value used to test which trigger sources are
  * supported.
  *
  * %TRIG_INVALID - "all zeroes" value used to indicate that all requested
  * trigger sources are invalid.
  *
  * %TRIG_NONE - never trigger (often used as a @stop_src value).
  *
  * %TRIG_NOW - trigger after '_arg' nanoseconds.
  *
  * %TRIG_FOLLOW - trigger follows another event.
  *
  * %TRIG_TIMER - trigger every '_arg' nanoseconds.
  *
  * %TRIG_COUNT - trigger when count '_arg' is reached.
  *
  * %TRIG_EXT - trigger on external signal specified by '_arg'.
  *
  * %TRIG_INT - trigger on internal, software trigger specified by '_arg'.
  *
  * %TRIG_OTHER - trigger on other, driver-defined signal specified by '_arg'.
  */
 struct comedi_cmd {
 	unsigned int subdev;
 	unsigned int flags;
 
 	unsigned int start_src;
 	unsigned int start_arg;
 
 	unsigned int scan_begin_src;
 	unsigned int scan_begin_arg;
 
 	unsigned int convert_src;
 	unsigned int convert_arg;
 
 	unsigned int scan_end_src;
 	unsigned int scan_end_arg;
 
 	unsigned int stop_src;
 	unsigned int stop_arg;
 
 	unsigned int *chanlist;
 	unsigned int chanlist_len;
 
 	short *data;
 	unsigned int data_len;
 };
 
 /**
  * struct comedi_chaninfo - used to retrieve per-channel information
  * @subdev:		Subdevice index.
  * @maxdata_list:	Optional pointer to per-channel maximum data values.
  * @flaglist:		Optional pointer to per-channel flags.
  * @rangelist:		Optional pointer to per-channel range types.
  * @unused:		Reserved for future use.
  *
  * This is used with the %COMEDI_CHANINFO ioctl to get per-channel information
  * for the subdevice.  Use of this requires knowledge of the number of channels
  * and subdevice flags obtained using the %COMEDI_SUBDINFO ioctl.
  *
  * The @maxdata_list member must be %NULL unless the %SDF_MAXDATA subdevice
  * flag is set.  The @flaglist member must be %NULL unless the %SDF_FLAGS
  * subdevice flag is set.  The @rangelist member must be %NULL unless the
  * %SDF_RANGETYPE subdevice flag is set.  Otherwise, the arrays they point to
  * must be at least as long as the number of channels.
  */
 struct comedi_chaninfo {
 	unsigned int subdev;
 	unsigned int *maxdata_list;
 	unsigned int *flaglist;
 	unsigned int *rangelist;
 	unsigned int unused[4];
 };
 
 /**
  * struct comedi_rangeinfo - used to retrieve the range table for a channel
  * @range_type:		Encodes subdevice index (bits 27:24), channel index
  *			(bits 23:16) and range table length (bits 15:0).
  * @range_ptr:		Pointer to array of @struct comedi_krange to be filled
  *			in with the range table for the channel or subdevice.
  *
  * This is used with the %COMEDI_RANGEINFO ioctl to retrieve the range table
  * for a specific channel (if the subdevice has the %SDF_RANGETYPE flag set to
  * indicate that the range table depends on the channel), or for the subdevice
  * as a whole (if the %SDF_RANGETYPE flag is clear, indicating the range table
  * is shared by all channels).
  *
  * The @range_type value is an input to the ioctl and comes from a previous
  * use of the %COMEDI_SUBDINFO ioctl (if the %SDF_RANGETYPE flag is clear),
  * or the %COMEDI_CHANINFO ioctl (if the %SDF_RANGETYPE flag is set).
  */
 struct comedi_rangeinfo {
 	unsigned int range_type;
 	void *range_ptr;
 };
 
 /**
  * struct comedi_krange - describes a range in a range table
  * @min:	Minimum value in millionths (1e-6) of a unit.
  * @max:	Maximum value in millionths (1e-6) of a unit.
  * @flags:	Indicates the units (in bits 7:0) OR'ed with optional flags.
  *
  * A range table is associated with a single channel, or with all channels in a
  * subdevice, and a list of one or more ranges.  A %struct comedi_krange
  * describes the physical range of units for one of those ranges.  Sample
  * values in COMEDI are unsigned from %0 up to some 'maxdata' value.  The
  * mapping from sample values to physical units is assumed to be nomimally
  * linear (for the purpose of describing the range), with sample value %0
  * mapping to @min, and the 'maxdata' sample value mapping to @max.
  *
  * The currently defined units are %UNIT_volt (%0), %UNIT_mA (%1), and
  * %UNIT_none (%2).  The @min and @max values are the physical range multiplied
  * by 1e6, so a @max value of %1000000 (with %UNIT_volt) represents a maximal
  * value of 1 volt.
  *
  * The only defined flag value is %RF_EXTERNAL (%0x100), indicating that the
  * range needs to be multiplied by an external reference.
  */
 struct comedi_krange {
 	int min;
 	int max;
 	unsigned int flags;
 };
 
 /**
  * struct comedi_subdinfo - used to retrieve information about a subdevice
  * @type:		Type of subdevice from &enum comedi_subdevice_type.
  * @n_chan:		Number of channels the subdevice supports.
  * @subd_flags:		A mixture of static and dynamic flags describing
  *			aspects of the subdevice and its current state.
  * @timer_type:		Timer type.  Always set to %5 ("nanosecond timer").
  * @len_chanlist:	Maximum length of a channel list if the subdevice
  *			supports asynchronous acquisition commands.
  * @maxdata:		Maximum sample value for all channels if the
  *			%SDF_MAXDATA subdevice flag is clear.
  * @flags:		Channel flags for all channels if the %SDF_FLAGS
  *			subdevice flag is clear.
  * @range_type:		The range type for all channels if the %SDF_RANGETYPE
  *			subdevice flag is clear.  Encodes the subdevice index
  *			(bits 27:24), a dummy channel index %0 (bits 23:16),
  *			and the range table length (bits 15:0).
  * @settling_time_0:	Not used.
  * @insn_bits_support:	Set to %COMEDI_SUPPORTED if the subdevice supports the
  *			%INSN_BITS instruction, or to %COMEDI_UNSUPPORTED if it
  *			does not.
  * @unused:		Reserved for future use.
  *
  * This is used with the %COMEDI_SUBDINFO ioctl which copies an array of
  * &struct comedi_subdinfo back to user space, with one element per subdevice.
  * Use of this requires knowledge of the number of subdevices obtained from
  * the %COMEDI_DEVINFO ioctl.
  *
  * These are the @subd_flags values that may be ORed together...
  *
  * %SDF_BUSY - the subdevice is busy processing an asynchronous command or a
  * synchronous instruction.
  *
  * %SDF_BUSY_OWNER - the subdevice is busy processing an asynchronous
  * acquisition command started on the current file object (the file object
  * issuing the %COMEDI_SUBDINFO ioctl).
  *
  * %SDF_LOCKED - the subdevice is locked by a %COMEDI_LOCK ioctl.
  *
  * %SDF_LOCK_OWNER - the subdevice is locked by a %COMEDI_LOCK ioctl from the
  * current file object.
  *
  * %SDF_MAXDATA - maximum sample values are channel-specific.
  *
  * %SDF_FLAGS - channel flags are channel-specific.
  *
  * %SDF_RANGETYPE - range types are channel-specific.
  *
  * %SDF_PWM_COUNTER - PWM can switch off automatically.
  *
  * %SDF_PWM_HBRIDGE - or PWM is signed (H-bridge).
  *
  * %SDF_CMD - the subdevice supports asynchronous commands.
  *
  * %SDF_SOFT_CALIBRATED - the subdevice uses software calibration.
  *
  * %SDF_CMD_WRITE - the subdevice supports asynchronous commands in the output
  * ("write") direction.
  *
  * %SDF_CMD_READ - the subdevice supports asynchronous commands in the input
  * ("read") direction.
  *
  * %SDF_READABLE - the subdevice is readable (e.g. analog input).
  *
  * %SDF_WRITABLE (aliased as %SDF_WRITEABLE) - the subdevice is writable (e.g.
  * analog output).
  *
  * %SDF_INTERNAL - the subdevice has no externally visible lines.
  *
  * %SDF_GROUND - the subdevice can use ground as an analog reference.
  *
  * %SDF_COMMON - the subdevice can use a common analog reference.
  *
  * %SDF_DIFF - the subdevice can use differential inputs (or outputs).
  *
  * %SDF_OTHER - the subdevice can use some other analog reference.
  *
  * %SDF_DITHER - the subdevice can do dithering.
  *
  * %SDF_DEGLITCH - the subdevice can do deglitching.
  *
  * %SDF_MMAP - this is never set.
  *
  * %SDF_RUNNING - an asynchronous command is still running.
  *
  * %SDF_LSAMPL - the subdevice uses "long" (32-bit) samples (for asynchronous
  * command data).
  *
  * %SDF_PACKED - the subdevice packs several DIO samples into a single sample
  * (for asynchronous command data).
  *
  * No "channel flags" (@flags) values are currently defined.
  */
 struct comedi_subdinfo {
 	unsigned int type;
 	unsigned int n_chan;
 	unsigned int subd_flags;
 	unsigned int timer_type;
 	unsigned int len_chanlist;
 	unsigned int maxdata;
 	unsigned int flags;
 	unsigned int range_type;
 	unsigned int settling_time_0;
 	unsigned int insn_bits_support;
 	unsigned int unused[8];
 };
 
 /**
  * struct comedi_devinfo - used to retrieve information about a COMEDI device
  * @version_code:	COMEDI version code.
  * @n_subdevs:		Number of subdevices the device has.
  * @driver_name:	Null-terminated COMEDI driver name.
  * @board_name:		Null-terminated COMEDI board name.
  * @read_subdevice:	Index of the current "read" subdevice (%-1 if none).
  * @write_subdevice:	Index of the current "write" subdevice (%-1 if none).
  * @unused:		Reserved for future use.
  *
  * This is used with the %COMEDI_DEVINFO ioctl to get basic information about
  * the device.
  */
 struct comedi_devinfo {
 	unsigned int version_code;
 	unsigned int n_subdevs;
 	char driver_name[COMEDI_NAMELEN];
 	char board_name[COMEDI_NAMELEN];
 	int read_subdevice;
 	int write_subdevice;
 	int unused[30];
 };
 
 /**
  * struct comedi_devconfig - used to configure a legacy COMEDI device
  * @board_name:		Null-terminated string specifying the type of board
  *			to configure.
  * @options:		An array of integer configuration options.
  *
  * This is used with the %COMEDI_DEVCONFIG ioctl to configure a "legacy" COMEDI
  * device, such as an ISA card.  Not all COMEDI drivers support this.  Those
  * that do either expect the specified board name to match one of a list of
  * names registered with the COMEDI core, or expect the specified board name
  * to match the COMEDI driver name itself.  The configuration options are
  * handled in a driver-specific manner.
  */
 struct comedi_devconfig {
 	char board_name[COMEDI_NAMELEN];
 	int options[COMEDI_NDEVCONFOPTS];
 };
 
 /**
  * struct comedi_bufconfig - used to set or get buffer size for a subdevice
  * @subdevice:		Subdevice index.
  * @flags:		Not used.
  * @maximum_size:	Maximum allowed buffer size.
  * @size:		Buffer size.
  * @unused:		Reserved for future use.
  *
  * This is used with the %COMEDI_BUFCONFIG ioctl to get or configure the
  * maximum buffer size and current buffer size for a COMEDI subdevice that
  * supports asynchronous commands.  If the subdevice does not support
  * asynchronous commands, @maximum_size and @size are ignored and set to 0.
  *
  * On ioctl input, non-zero values of @maximum_size and @size specify a
  * new maximum size and new current size (in bytes), respectively.  These
  * will by rounded up to a multiple of %PAGE_SIZE.  Specifying a new maximum
  * size requires admin capabilities.
  *
  * On ioctl output, @maximum_size and @size and set to the current maximum
  * buffer size and current buffer size, respectively.
  */
 struct comedi_bufconfig {
 	unsigned int subdevice;
 	unsigned int flags;
 
 	unsigned int maximum_size;
 	unsigned int size;
 
 	unsigned int unused[4];
 };
 
 /**
  * struct comedi_bufinfo - used to manipulate buffer position for a subdevice
  * @subdevice:		Subdevice index.
  * @bytes_read:		Specify amount to advance read position for an
  *			asynchronous command in the input ("read") direction.
  * @buf_write_ptr:	Current write position (index) within the buffer.
  * @buf_read_ptr:	Current read position (index) within the buffer.
  * @buf_write_count:	Total amount written, modulo 2^32.
  * @buf_read_count:	Total amount read, modulo 2^32.
  * @bytes_written:	Specify amount to advance write position for an
  *			asynchronous command in the output ("write") direction.
  * @unused:		Reserved for future use.
  *
  * This is used with the %COMEDI_BUFINFO ioctl to optionally advance the
  * current read or write position in an asynchronous acquisition data buffer,
  * and to get the current read and write positions in the buffer.
  */
 struct comedi_bufinfo {
 	unsigned int subdevice;
 	unsigned int bytes_read;
 
 	unsigned int buf_write_ptr;
 	unsigned int buf_read_ptr;
 	unsigned int buf_write_count;
 	unsigned int buf_read_count;
 
 	unsigned int bytes_written;
 
 	unsigned int unused[4];
 };
 
 /* range stuff */
 
 #define __RANGE(a, b)	((((a) & 0xffff) << 16) | ((b) & 0xffff))
 
 #define RANGE_OFFSET(a)		(((a) >> 16) & 0xffff)
 #define RANGE_LENGTH(b)		((b) & 0xffff)
 
 #define RF_UNIT(flags)		((flags) & 0xff)
 #define RF_EXTERNAL		0x100
 
 #define UNIT_volt		0
 #define UNIT_mA			1
 #define UNIT_none		2
 
 #define COMEDI_MIN_SPEED	0xffffffffu
 
 /**********************************************************/
 /* everything after this line is ALPHA */
 /**********************************************************/
 
 /*
  * 8254 specific configuration.
  *
  * It supports two config commands:
  *
  * 0 ID: INSN_CONFIG_SET_COUNTER_MODE
  * 1 8254 Mode
  * I8254_MODE0, I8254_MODE1, ..., I8254_MODE5
  * OR'ed with:
  * I8254_BCD, I8254_BINARY
  *
  * 0 ID: INSN_CONFIG_8254_READ_STATUS
  * 1 <-- Status byte returned here.
  * B7 = Output
  * B6 = NULL Count
  * B5 - B0 Current mode.
  */
 
 enum i8254_mode {
 	I8254_MODE0 = (0 << 1),	/* Interrupt on terminal count */
 	I8254_MODE1 = (1 << 1),	/* Hardware retriggerable one-shot */
 	I8254_MODE2 = (2 << 1),	/* Rate generator */
 	I8254_MODE3 = (3 << 1),	/* Square wave mode */
 	I8254_MODE4 = (4 << 1),	/* Software triggered strobe */
 	/* Hardware triggered strobe (retriggerable) */
 	I8254_MODE5 = (5 << 1),
 	/* Use binary-coded decimal instead of binary (pretty useless) */
 	I8254_BCD = 1,
 	I8254_BINARY = 0
 };
 
 /* *** BEGIN GLOBALLY-NAMED NI TERMINALS/SIGNALS *** */
 
 /*
  * Common National Instruments Terminal/Signal names.
  * Some of these have no NI_ prefix as they are useful for non-NI hardware, such
  * as those that utilize the PXI/RTSI trigger lines.
  *
  * NOTE ABOUT THE CHOICE OF NAMES HERE AND THE CAMELSCRIPT:
  *   The choice to use CamelScript and the exact names below is for
  *   maintainability, clarity, similarity to manufacturer's documentation,
  *   _and_ a mitigation for confusion that has plagued the use of these drivers
  *   for years!
  *
  *   More detail:
  *   There have been significant confusions over the past many years for users
  *   when trying to understand how to connect to/from signals and terminals on
  *   NI hardware using comedi.  The major reason for this is that the actual
  *   register values were exposed and required to be used by users.  Several
  *   major reasons exist why this caused major confusion for users:
  *   1) The register values are _NOT_ in user documentation, but rather in
  *     arcane locations, such as a few register programming manuals that are
  *     increasingly hard to find and the NI MHDDK (comments in example code).
  *     There is no one place to find the various valid values of the registers.
  *   2) The register values are _NOT_ completely consistent.  There is no way to
  *     gain any sense of intuition of which values, or even enums one should use
  *     for various registers.  There was some attempt in prior use of comedi to
  *     name enums such that a user might know which enums should be used for
  *     varying purposes, but the end-user had to gain a knowledge of register
  *     values to correctly wield this approach.
  *   3) The names for signals and registers found in the various register level
  *     programming manuals and vendor-provided documentation are _not_ even
  *     close to the same names that are in the end-user documentation.
  *
  *   Similar, albeit less, confusion plagued NI's previous version of their own
  *   drivers.  Earlier than 2003, NI greatly simplified the situation for users
  *   by releasing a new API that abstracted the names of signals/terminals to a
  *   common and intuitive set of names.
  *
  *   The names below mirror the names chosen and well documented by NI.  These
  *   names are exposed to the user via the comedilib user library.  By keeping
  *   the names below, in spite of the use of CamelScript, maintenance will be
  *   greatly eased and confusion for users _and_ comedi developers will be
  *   greatly reduced.
  */
 
 /*
  * Base of abstracted NI names.
  * The first 16 bits of *_arg are reserved for channel selection.
  * Since we only actually need the first 4 or 5 bits for all register values on
  * NI select registers anyways, we'll identify all values >= (1<<15) as being an
  * abstracted NI signal/terminal name.
  * These values are also used/returned by INSN_DEVICE_CONFIG_TEST_ROUTE,
  * INSN_DEVICE_CONFIG_CONNECT_ROUTE, INSN_DEVICE_CONFIG_DISCONNECT_ROUTE,
  * and INSN_DEVICE_CONFIG_GET_ROUTES.
  */
 #define NI_NAMES_BASE	0x8000u
 
 #define _TERM_N(base, n, x)	((base) + ((x) & ((n) - 1)))
 
 /*
  * not necessarily all allowed 64 PFIs are valid--certainly not for all devices
  */
 #define NI_PFI(x)		_TERM_N(NI_NAMES_BASE, 64, x)
 /* 8 trigger lines by standard, Some devices cannot talk to all eight. */
 #define TRIGGER_LINE(x)		_TERM_N(NI_PFI(-1) + 1, 8, x)
 /* 4 RTSI shared MUXes to route signals to/from TRIGGER_LINES on NI hardware */
 #define NI_RTSI_BRD(x)		_TERM_N(TRIGGER_LINE(-1) + 1, 4, x)
 
 /* *** Counter/timer names : 8 counters max *** */
 #define NI_MAX_COUNTERS		8
 #define NI_COUNTER_NAMES_BASE	(NI_RTSI_BRD(-1)  + 1)
 #define NI_CtrSource(x)	      _TERM_N(NI_COUNTER_NAMES_BASE, NI_MAX_COUNTERS, x)
 /* Gate, Aux, A,B,Z are all treated, at times as gates */
 #define NI_GATES_NAMES_BASE	(NI_CtrSource(-1) + 1)
 #define NI_CtrGate(x)		_TERM_N(NI_GATES_NAMES_BASE, NI_MAX_COUNTERS, x)
 #define NI_CtrAux(x)		_TERM_N(NI_CtrGate(-1)  + 1, NI_MAX_COUNTERS, x)
 #define NI_CtrA(x)		_TERM_N(NI_CtrAux(-1)   + 1, NI_MAX_COUNTERS, x)
 #define NI_CtrB(x)		_TERM_N(NI_CtrA(-1)     + 1, NI_MAX_COUNTERS, x)
 #define NI_CtrZ(x)		_TERM_N(NI_CtrB(-1)     + 1, NI_MAX_COUNTERS, x)
 #define NI_GATES_NAMES_MAX	NI_CtrZ(-1)
 #define NI_CtrArmStartTrigger(x) _TERM_N(NI_CtrZ(-1)    + 1, NI_MAX_COUNTERS, x)
 #define NI_CtrInternalOutput(x) \
 		      _TERM_N(NI_CtrArmStartTrigger(-1) + 1, NI_MAX_COUNTERS, x)
 /** external pin(s) labeled conveniently as Ctr<i>Out. */
 #define NI_CtrOut(x)   _TERM_N(NI_CtrInternalOutput(-1) + 1, NI_MAX_COUNTERS, x)
 /** For Buffered sampling of ctr -- x series capability. */
 #define NI_CtrSampleClock(x)	_TERM_N(NI_CtrOut(-1)   + 1, NI_MAX_COUNTERS, x)
 #define NI_COUNTER_NAMES_MAX	NI_CtrSampleClock(-1)
 
 enum ni_common_signal_names {
 	/* PXI_Star: this is a non-NI-specific signal */
 	PXI_Star = NI_COUNTER_NAMES_MAX + 1,
 	PXI_Clk10,
 	PXIe_Clk100,
 	NI_AI_SampleClock,
 	NI_AI_SampleClockTimebase,
 	NI_AI_StartTrigger,
 	NI_AI_ReferenceTrigger,
 	NI_AI_ConvertClock,
 	NI_AI_ConvertClockTimebase,
 	NI_AI_PauseTrigger,
 	NI_AI_HoldCompleteEvent,
 	NI_AI_HoldComplete,
 	NI_AI_ExternalMUXClock,
 	NI_AI_STOP, /* pulse signal that occurs when a update is finished(?) */
 	NI_AO_SampleClock,
 	NI_AO_SampleClockTimebase,
 	NI_AO_StartTrigger,
 	NI_AO_PauseTrigger,
 	NI_DI_SampleClock,
 	NI_DI_SampleClockTimebase,
 	NI_DI_StartTrigger,
 	NI_DI_ReferenceTrigger,
 	NI_DI_PauseTrigger,
 	NI_DI_InputBufferFull,
 	NI_DI_ReadyForStartEvent,
 	NI_DI_ReadyForTransferEventBurst,
 	NI_DI_ReadyForTransferEventPipelined,
 	NI_DO_SampleClock,
 	NI_DO_SampleClockTimebase,
 	NI_DO_StartTrigger,
 	NI_DO_PauseTrigger,
 	NI_DO_OutputBufferFull,
 	NI_DO_DataActiveEvent,
 	NI_DO_ReadyForStartEvent,
 	NI_DO_ReadyForTransferEvent,
 	NI_MasterTimebase,
 	NI_20MHzTimebase,
 	NI_80MHzTimebase,
 	NI_100MHzTimebase,
 	NI_200MHzTimebase,
 	NI_100kHzTimebase,
 	NI_10MHzRefClock,
 	NI_FrequencyOutput,
 	NI_ChangeDetectionEvent,
 	NI_AnalogComparisonEvent,
 	NI_WatchdogExpiredEvent,
 	NI_WatchdogExpirationTrigger,
 	NI_SCXI_Trig1,
 	NI_LogicLow,
 	NI_LogicHigh,
 	NI_ExternalStrobe,
 	NI_PFI_DO,
 	NI_CaseGround,
 	/* special internal signal used as variable source for RTSI bus: */
 	NI_RGOUT0,
 
 	/* just a name to make the next more convenient, regardless of above */
 	_NI_NAMES_MAX_PLUS_1,
 	NI_NUM_NAMES = _NI_NAMES_MAX_PLUS_1 - NI_NAMES_BASE,
 };
 
 /* *** END GLOBALLY-NAMED NI TERMINALS/SIGNALS *** */
 
 #define NI_USUAL_PFI_SELECT(x)	(((x) < 10) ? (0x1 + (x)) : (0xb + (x)))
 #define NI_USUAL_RTSI_SELECT(x)	(((x) < 7) ? (0xb + (x)) : 0x1b)
 
 /*
  * mode bits for NI general-purpose counters, set with
  * INSN_CONFIG_SET_COUNTER_MODE
  */
 #define NI_GPCT_COUNTING_MODE_SHIFT 16
 #define NI_GPCT_INDEX_PHASE_BITSHIFT 20
 #define NI_GPCT_COUNTING_DIRECTION_SHIFT 24
 enum ni_gpct_mode_bits {
 	NI_GPCT_GATE_ON_BOTH_EDGES_BIT = 0x4,
 	NI_GPCT_EDGE_GATE_MODE_MASK = 0x18,
 	NI_GPCT_EDGE_GATE_STARTS_STOPS_BITS = 0x0,
 	NI_GPCT_EDGE_GATE_STOPS_STARTS_BITS = 0x8,
 	NI_GPCT_EDGE_GATE_STARTS_BITS = 0x10,
 	NI_GPCT_EDGE_GATE_NO_STARTS_NO_STOPS_BITS = 0x18,
 	NI_GPCT_STOP_MODE_MASK = 0x60,
 	NI_GPCT_STOP_ON_GATE_BITS = 0x00,
 	NI_GPCT_STOP_ON_GATE_OR_TC_BITS = 0x20,
 	NI_GPCT_STOP_ON_GATE_OR_SECOND_TC_BITS = 0x40,
 	NI_GPCT_LOAD_B_SELECT_BIT = 0x80,
 	NI_GPCT_OUTPUT_MODE_MASK = 0x300,
 	NI_GPCT_OUTPUT_TC_PULSE_BITS = 0x100,
 	NI_GPCT_OUTPUT_TC_TOGGLE_BITS = 0x200,
 	NI_GPCT_OUTPUT_TC_OR_GATE_TOGGLE_BITS = 0x300,
 	NI_GPCT_HARDWARE_DISARM_MASK = 0xc00,
 	NI_GPCT_NO_HARDWARE_DISARM_BITS = 0x000,
 	NI_GPCT_DISARM_AT_TC_BITS = 0x400,
 	NI_GPCT_DISARM_AT_GATE_BITS = 0x800,
 	NI_GPCT_DISARM_AT_TC_OR_GATE_BITS = 0xc00,
 	NI_GPCT_LOADING_ON_TC_BIT = 0x1000,
 	NI_GPCT_LOADING_ON_GATE_BIT = 0x4000,
 	NI_GPCT_COUNTING_MODE_MASK = 0x7 << NI_GPCT_COUNTING_MODE_SHIFT,
 	NI_GPCT_COUNTING_MODE_NORMAL_BITS =
 		0x0 << NI_GPCT_COUNTING_MODE_SHIFT,
 	NI_GPCT_COUNTING_MODE_QUADRATURE_X1_BITS =
 		0x1 << NI_GPCT_COUNTING_MODE_SHIFT,
 	NI_GPCT_COUNTING_MODE_QUADRATURE_X2_BITS =
 		0x2 << NI_GPCT_COUNTING_MODE_SHIFT,
 	NI_GPCT_COUNTING_MODE_QUADRATURE_X4_BITS =
 		0x3 << NI_GPCT_COUNTING_MODE_SHIFT,
 	NI_GPCT_COUNTING_MODE_TWO_PULSE_BITS =
 		0x4 << NI_GPCT_COUNTING_MODE_SHIFT,
 	NI_GPCT_COUNTING_MODE_SYNC_SOURCE_BITS =
 		0x6 << NI_GPCT_COUNTING_MODE_SHIFT,
 	NI_GPCT_INDEX_PHASE_MASK = 0x3 << NI_GPCT_INDEX_PHASE_BITSHIFT,
 	NI_GPCT_INDEX_PHASE_LOW_A_LOW_B_BITS =
 		0x0 << NI_GPCT_INDEX_PHASE_BITSHIFT,
 	NI_GPCT_INDEX_PHASE_LOW_A_HIGH_B_BITS =
 		0x1 << NI_GPCT_INDEX_PHASE_BITSHIFT,
 	NI_GPCT_INDEX_PHASE_HIGH_A_LOW_B_BITS =
 		0x2 << NI_GPCT_INDEX_PHASE_BITSHIFT,
 	NI_GPCT_INDEX_PHASE_HIGH_A_HIGH_B_BITS =
 		0x3 << NI_GPCT_INDEX_PHASE_BITSHIFT,
 	NI_GPCT_INDEX_ENABLE_BIT = 0x400000,
 	NI_GPCT_COUNTING_DIRECTION_MASK =
 		0x3 << NI_GPCT_COUNTING_DIRECTION_SHIFT,
 	NI_GPCT_COUNTING_DIRECTION_DOWN_BITS =
 		0x00 << NI_GPCT_COUNTING_DIRECTION_SHIFT,
 	NI_GPCT_COUNTING_DIRECTION_UP_BITS =
 		0x1 << NI_GPCT_COUNTING_DIRECTION_SHIFT,
 	NI_GPCT_COUNTING_DIRECTION_HW_UP_DOWN_BITS =
 		0x2 << NI_GPCT_COUNTING_DIRECTION_SHIFT,
 	NI_GPCT_COUNTING_DIRECTION_HW_GATE_BITS =
 		0x3 << NI_GPCT_COUNTING_DIRECTION_SHIFT,
 	NI_GPCT_RELOAD_SOURCE_MASK = 0xc000000,
 	NI_GPCT_RELOAD_SOURCE_FIXED_BITS = 0x0,
 	NI_GPCT_RELOAD_SOURCE_SWITCHING_BITS = 0x4000000,
 	NI_GPCT_RELOAD_SOURCE_GATE_SELECT_BITS = 0x8000000,
 	NI_GPCT_OR_GATE_BIT = 0x10000000,
 	NI_GPCT_INVERT_OUTPUT_BIT = 0x20000000
 };
 
 /*
  * Bits for setting a clock source with
  * INSN_CONFIG_SET_CLOCK_SRC when using NI general-purpose counters.
  */
 enum ni_gpct_clock_source_bits {
 	NI_GPCT_CLOCK_SRC_SELECT_MASK = 0x3f,
 	NI_GPCT_TIMEBASE_1_CLOCK_SRC_BITS = 0x0,
 	NI_GPCT_TIMEBASE_2_CLOCK_SRC_BITS = 0x1,
 	NI_GPCT_TIMEBASE_3_CLOCK_SRC_BITS = 0x2,
 	NI_GPCT_LOGIC_LOW_CLOCK_SRC_BITS = 0x3,
 	NI_GPCT_NEXT_GATE_CLOCK_SRC_BITS = 0x4,
 	NI_GPCT_NEXT_TC_CLOCK_SRC_BITS = 0x5,
 	/* NI 660x-specific */
 	NI_GPCT_SOURCE_PIN_i_CLOCK_SRC_BITS = 0x6,
 	NI_GPCT_PXI10_CLOCK_SRC_BITS = 0x7,
 	NI_GPCT_PXI_STAR_TRIGGER_CLOCK_SRC_BITS = 0x8,
 	NI_GPCT_ANALOG_TRIGGER_OUT_CLOCK_SRC_BITS = 0x9,
 	NI_GPCT_PRESCALE_MODE_CLOCK_SRC_MASK = 0x30000000,
 	NI_GPCT_NO_PRESCALE_CLOCK_SRC_BITS = 0x0,
 	/* divide source by 2 */
 	NI_GPCT_PRESCALE_X2_CLOCK_SRC_BITS = 0x10000000,
 	/* divide source by 8 */
 	NI_GPCT_PRESCALE_X8_CLOCK_SRC_BITS = 0x20000000,
 	NI_GPCT_INVERT_CLOCK_SRC_BIT = 0x80000000
 };
 
 /* NI 660x-specific */
 #define NI_GPCT_SOURCE_PIN_CLOCK_SRC_BITS(x)	(0x10 + (x))
 
 #define NI_GPCT_RTSI_CLOCK_SRC_BITS(x)		(0x18 + (x))
 
 /* no pfi on NI 660x */
 #define NI_GPCT_PFI_CLOCK_SRC_BITS(x)		(0x20 + (x))
 
 /*
  * Possibilities for setting a gate source with
  * INSN_CONFIG_SET_GATE_SRC when using NI general-purpose counters.
  * May be bitwise-or'd with CR_EDGE or CR_INVERT.
  */
 enum ni_gpct_gate_select {
 	/* m-series gates */
 	NI_GPCT_TIMESTAMP_MUX_GATE_SELECT = 0x0,
 	NI_GPCT_AI_START2_GATE_SELECT = 0x12,
 	NI_GPCT_PXI_STAR_TRIGGER_GATE_SELECT = 0x13,
 	NI_GPCT_NEXT_OUT_GATE_SELECT = 0x14,
 	NI_GPCT_AI_START1_GATE_SELECT = 0x1c,
 	NI_GPCT_NEXT_SOURCE_GATE_SELECT = 0x1d,
 	NI_GPCT_ANALOG_TRIGGER_OUT_GATE_SELECT = 0x1e,
 	NI_GPCT_LOGIC_LOW_GATE_SELECT = 0x1f,
 	/* more gates for 660x */
 	NI_GPCT_SOURCE_PIN_i_GATE_SELECT = 0x100,
 	NI_GPCT_GATE_PIN_i_GATE_SELECT = 0x101,
 	/* more gates for 660x "second gate" */
 	NI_GPCT_UP_DOWN_PIN_i_GATE_SELECT = 0x201,
 	NI_GPCT_SELECTED_GATE_GATE_SELECT = 0x21e,
 	/*
 	 * m-series "second gate" sources are unknown,
 	 * we should add them here with an offset of 0x300 when
 	 * known.
 	 */
 	NI_GPCT_DISABLED_GATE_SELECT = 0x8000,
 };
 
 #define NI_GPCT_GATE_PIN_GATE_SELECT(x)		(0x102 + (x))
 #define NI_GPCT_RTSI_GATE_SELECT(x)		NI_USUAL_RTSI_SELECT(x)
 #define NI_GPCT_PFI_GATE_SELECT(x)		NI_USUAL_PFI_SELECT(x)
 #define NI_GPCT_UP_DOWN_PIN_GATE_SELECT(x)	(0x202 + (x))
 
 /*
  * Possibilities for setting a source with
  * INSN_CONFIG_SET_OTHER_SRC when using NI general-purpose counters.
  */
 enum ni_gpct_other_index {
 	NI_GPCT_SOURCE_ENCODER_A,
 	NI_GPCT_SOURCE_ENCODER_B,
 	NI_GPCT_SOURCE_ENCODER_Z
 };
 
 enum ni_gpct_other_select {
 	/* m-series gates */
 	/* Still unknown, probably only need NI_GPCT_PFI_OTHER_SELECT */
 	NI_GPCT_DISABLED_OTHER_SELECT = 0x8000,
 };
 
 #define NI_GPCT_PFI_OTHER_SELECT(x)	NI_USUAL_PFI_SELECT(x)
 
 /*
  * start sources for ni general-purpose counters for use with
  * INSN_CONFIG_ARM
  */
 enum ni_gpct_arm_source {
 	NI_GPCT_ARM_IMMEDIATE = 0x0,
 	/*
 	 * Start both the counter and the adjacent paired counter simultaneously
 	 */
 	NI_GPCT_ARM_PAIRED_IMMEDIATE = 0x1,
 	/*
 	 * If the NI_GPCT_HW_ARM bit is set, we will pass the least significant
 	 * bits (3 bits for 660x or 5 bits for m-series) through to the
 	 * hardware. To select a hardware trigger, pass the appropriate select
 	 * bit, e.g.,
 	 * NI_GPCT_HW_ARM | NI_GPCT_AI_START1_GATE_SELECT or
 	 * NI_GPCT_HW_ARM | NI_GPCT_PFI_GATE_SELECT(pfi_number)
 	 */
 	NI_GPCT_HW_ARM = 0x1000,
 	NI_GPCT_ARM_UNKNOWN = NI_GPCT_HW_ARM,	/* for backward compatibility */
 };
 
 /* digital filtering options for ni 660x for use with INSN_CONFIG_FILTER. */
 enum ni_gpct_filter_select {
 	NI_GPCT_FILTER_OFF = 0x0,
 	NI_GPCT_FILTER_TIMEBASE_3_SYNC = 0x1,
 	NI_GPCT_FILTER_100x_TIMEBASE_1 = 0x2,
 	NI_GPCT_FILTER_20x_TIMEBASE_1 = 0x3,
 	NI_GPCT_FILTER_10x_TIMEBASE_1 = 0x4,
 	NI_GPCT_FILTER_2x_TIMEBASE_1 = 0x5,
 	NI_GPCT_FILTER_2x_TIMEBASE_3 = 0x6
 };
 
 /*
  * PFI digital filtering options for ni m-series for use with
  * INSN_CONFIG_FILTER.
  */
 enum ni_pfi_filter_select {
 	NI_PFI_FILTER_OFF = 0x0,
 	NI_PFI_FILTER_125ns = 0x1,
 	NI_PFI_FILTER_6425ns = 0x2,
 	NI_PFI_FILTER_2550us = 0x3
 };
 
 /* master clock sources for ni mio boards and INSN_CONFIG_SET_CLOCK_SRC */
 enum ni_mio_clock_source {
 	NI_MIO_INTERNAL_CLOCK = 0,
 	/*
 	 * Doesn't work for m-series, use NI_MIO_PLL_RTSI_CLOCK()
 	 * the NI_MIO_PLL_* sources are m-series only
 	 */
 	NI_MIO_RTSI_CLOCK = 1,
 	NI_MIO_PLL_PXI_STAR_TRIGGER_CLOCK = 2,
 	NI_MIO_PLL_PXI10_CLOCK = 3,
 	NI_MIO_PLL_RTSI0_CLOCK = 4
 };
 
 #define NI_MIO_PLL_RTSI_CLOCK(x)	(NI_MIO_PLL_RTSI0_CLOCK + (x))
 
 /*
  * Signals which can be routed to an NI RTSI pin with INSN_CONFIG_SET_ROUTING.
  * The numbers assigned are not arbitrary, they correspond to the bits required
  * to program the board.
  */
 enum ni_rtsi_routing {
 	NI_RTSI_OUTPUT_ADR_START1 = 0,
 	NI_RTSI_OUTPUT_ADR_START2 = 1,
 	NI_RTSI_OUTPUT_SCLKG = 2,
 	NI_RTSI_OUTPUT_DACUPDN = 3,
 	NI_RTSI_OUTPUT_DA_START1 = 4,
 	NI_RTSI_OUTPUT_G_SRC0 = 5,
 	NI_RTSI_OUTPUT_G_GATE0 = 6,
 	NI_RTSI_OUTPUT_RGOUT0 = 7,
 	NI_RTSI_OUTPUT_RTSI_BRD_0 = 8,
 	/* Pre-m-series always have RTSI clock on line 7 */
 	NI_RTSI_OUTPUT_RTSI_OSC = 12
 };
 
 #define NI_RTSI_OUTPUT_RTSI_BRD(x)	(NI_RTSI_OUTPUT_RTSI_BRD_0 + (x))
 
 /*
  * Signals which can be routed to an NI PFI pin on an m-series board with
  * INSN_CONFIG_SET_ROUTING.  These numbers are also returned by
  * INSN_CONFIG_GET_ROUTING on pre-m-series boards, even though their routing
  * cannot be changed.  The numbers assigned are not arbitrary, they correspond
  * to the bits required to program the board.
  */
 enum ni_pfi_routing {
 	NI_PFI_OUTPUT_PFI_DEFAULT = 0,
 	NI_PFI_OUTPUT_AI_START1 = 1,
 	NI_PFI_OUTPUT_AI_START2 = 2,
 	NI_PFI_OUTPUT_AI_CONVERT = 3,
 	NI_PFI_OUTPUT_G_SRC1 = 4,
 	NI_PFI_OUTPUT_G_GATE1 = 5,
 	NI_PFI_OUTPUT_AO_UPDATE_N = 6,
 	NI_PFI_OUTPUT_AO_START1 = 7,
 	NI_PFI_OUTPUT_AI_START_PULSE = 8,
 	NI_PFI_OUTPUT_G_SRC0 = 9,
 	NI_PFI_OUTPUT_G_GATE0 = 10,
 	NI_PFI_OUTPUT_EXT_STROBE = 11,
 	NI_PFI_OUTPUT_AI_EXT_MUX_CLK = 12,
 	NI_PFI_OUTPUT_GOUT0 = 13,
 	NI_PFI_OUTPUT_GOUT1 = 14,
 	NI_PFI_OUTPUT_FREQ_OUT = 15,
 	NI_PFI_OUTPUT_PFI_DO = 16,
 	NI_PFI_OUTPUT_I_ATRIG = 17,
 	NI_PFI_OUTPUT_RTSI0 = 18,
 	NI_PFI_OUTPUT_PXI_STAR_TRIGGER_IN = 26,
 	NI_PFI_OUTPUT_SCXI_TRIG1 = 27,
 	NI_PFI_OUTPUT_DIO_CHANGE_DETECT_RTSI = 28,
 	NI_PFI_OUTPUT_CDI_SAMPLE = 29,
 	NI_PFI_OUTPUT_CDO_UPDATE = 30
 };
 
 #define NI_PFI_OUTPUT_RTSI(x)		(NI_PFI_OUTPUT_RTSI0 + (x))
 
 /*
  * Signals which can be routed to output on a NI PFI pin on a 660x board
  * with INSN_CONFIG_SET_ROUTING.  The numbers assigned are
  * not arbitrary, they correspond to the bits required
  * to program the board.  Lines 0 to 7 can only be set to
  * NI_660X_PFI_OUTPUT_DIO.  Lines 32 to 39 can only be set to
  * NI_660X_PFI_OUTPUT_COUNTER.
  */
 enum ni_660x_pfi_routing {
 	NI_660X_PFI_OUTPUT_COUNTER = 1,	/* counter */
 	NI_660X_PFI_OUTPUT_DIO = 2,	/* static digital output */
 };
 
 /*
  * NI External Trigger lines.  These values are not arbitrary, but are related
  * to the bits required to program the board (offset by 1 for historical
  * reasons).
  */
 #define NI_EXT_PFI(x)			(NI_USUAL_PFI_SELECT(x) - 1)
 #define NI_EXT_RTSI(x)			(NI_USUAL_RTSI_SELECT(x) - 1)
 
 /*
  * Clock sources for CDIO subdevice on NI m-series boards.  Used as the
  * scan_begin_arg for a comedi_command. These sources may also be bitwise-or'd
  * with CR_INVERT to change polarity.
  */
 enum ni_m_series_cdio_scan_begin_src {
 	NI_CDIO_SCAN_BEGIN_SRC_GROUND = 0,
 	NI_CDIO_SCAN_BEGIN_SRC_AI_START = 18,
 	NI_CDIO_SCAN_BEGIN_SRC_AI_CONVERT = 19,
 	NI_CDIO_SCAN_BEGIN_SRC_PXI_STAR_TRIGGER = 20,
 	NI_CDIO_SCAN_BEGIN_SRC_G0_OUT = 28,
 	NI_CDIO_SCAN_BEGIN_SRC_G1_OUT = 29,
 	NI_CDIO_SCAN_BEGIN_SRC_ANALOG_TRIGGER = 30,
 	NI_CDIO_SCAN_BEGIN_SRC_AO_UPDATE = 31,
 	NI_CDIO_SCAN_BEGIN_SRC_FREQ_OUT = 32,
 	NI_CDIO_SCAN_BEGIN_SRC_DIO_CHANGE_DETECT_IRQ = 33
 };
 
 #define NI_CDIO_SCAN_BEGIN_SRC_PFI(x)	NI_USUAL_PFI_SELECT(x)
 #define NI_CDIO_SCAN_BEGIN_SRC_RTSI(x)	NI_USUAL_RTSI_SELECT(x)
 
 /*
  * scan_begin_src for scan_begin_arg==TRIG_EXT with analog output command on NI
  * boards.  These scan begin sources can also be bitwise-or'd with CR_INVERT to
  * change polarity.
  */
 #define NI_AO_SCAN_BEGIN_SRC_PFI(x)	NI_USUAL_PFI_SELECT(x)
 #define NI_AO_SCAN_BEGIN_SRC_RTSI(x)	NI_USUAL_RTSI_SELECT(x)
 
 /*
  * Bits for setting a clock source with
  * INSN_CONFIG_SET_CLOCK_SRC when using NI frequency output subdevice.
  */
 enum ni_freq_out_clock_source_bits {
 	NI_FREQ_OUT_TIMEBASE_1_DIV_2_CLOCK_SRC,	/* 10 MHz */
 	NI_FREQ_OUT_TIMEBASE_2_CLOCK_SRC	/* 100 KHz */
 };
 
 /*
  * Values for setting a clock source with INSN_CONFIG_SET_CLOCK_SRC for
  * 8254 counter subdevices on Amplicon DIO boards (amplc_dio200 driver).
  */
 enum amplc_dio_clock_source {
 	/*
 	 * Per channel external clock
 	 * input/output pin (pin is only an
 	 * input when clock source set to this value,
 	 * otherwise it is an output)
 	 */
 	AMPLC_DIO_CLK_CLKN,
 	AMPLC_DIO_CLK_10MHZ,	/* 10 MHz internal clock */
 	AMPLC_DIO_CLK_1MHZ,	/* 1 MHz internal clock */
 	AMPLC_DIO_CLK_100KHZ,	/* 100 kHz internal clock */
 	AMPLC_DIO_CLK_10KHZ,	/* 10 kHz internal clock */
 	AMPLC_DIO_CLK_1KHZ,	/* 1 kHz internal clock */
 	/*
 	 * Output of preceding counter channel
 	 * (for channel 0, preceding counter
 	 * channel is channel 2 on preceding
 	 * counter subdevice, for first counter
 	 * subdevice, preceding counter
 	 * subdevice is the last counter
 	 * subdevice)
 	 */
 	AMPLC_DIO_CLK_OUTNM1,
 	AMPLC_DIO_CLK_EXT,	/* per chip external input pin */
 	/* the following are "enhanced" clock sources for PCIe models */
 	AMPLC_DIO_CLK_VCC,	/* clock input HIGH */
 	AMPLC_DIO_CLK_GND,	/* clock input LOW */
 	AMPLC_DIO_CLK_PAT_PRESENT, /* "pattern present" signal */
 	AMPLC_DIO_CLK_20MHZ	/* 20 MHz internal clock */
 };
 
 /*
  * Values for setting a clock source with INSN_CONFIG_SET_CLOCK_SRC for
  * timer subdevice on some Amplicon DIO PCIe boards (amplc_dio200 driver).
  */
 enum amplc_dio_ts_clock_src {
 	AMPLC_DIO_TS_CLK_1GHZ,	/* 1 ns period with 20 ns granularity */
 	AMPLC_DIO_TS_CLK_1MHZ,	/* 1 us period */
 	AMPLC_DIO_TS_CLK_1KHZ	/* 1 ms period */
 };
 
 /*
  * Values for setting a gate source with INSN_CONFIG_SET_GATE_SRC for
  * 8254 counter subdevices on Amplicon DIO boards (amplc_dio200 driver).
  */
 enum amplc_dio_gate_source {
 	AMPLC_DIO_GAT_VCC,	/* internal high logic level */
 	AMPLC_DIO_GAT_GND,	/* internal low logic level */
 	AMPLC_DIO_GAT_GATN,	/* per channel external gate input */
 	/*
 	 * negated output of counter channel minus 2
 	 * (for channels 0 or 1, channel minus 2 is channel 1 or 2 on
 	 * the preceding counter subdevice, for the first counter subdevice
 	 * the preceding counter subdevice is the last counter subdevice)
 	 */
 	AMPLC_DIO_GAT_NOUTNM2,
 	AMPLC_DIO_GAT_RESERVED4,
 	AMPLC_DIO_GAT_RESERVED5,
 	AMPLC_DIO_GAT_RESERVED6,
 	AMPLC_DIO_GAT_RESERVED7,
 	/* the following are "enhanced" gate sources for PCIe models */
 	AMPLC_DIO_GAT_NGATN = 6, /* negated per channel gate input */
 	/* non-negated output of counter channel minus 2 */
 	AMPLC_DIO_GAT_OUTNM2,
 	AMPLC_DIO_GAT_PAT_PRESENT, /* "pattern present" signal */
 	AMPLC_DIO_GAT_PAT_OCCURRED, /* "pattern occurred" latched */
 	AMPLC_DIO_GAT_PAT_GONE,	/* "pattern gone away" latched */
 	AMPLC_DIO_GAT_NPAT_PRESENT, /* negated "pattern present" */
 	AMPLC_DIO_GAT_NPAT_OCCURRED, /* negated "pattern occurred" */
 	AMPLC_DIO_GAT_NPAT_GONE	/* negated "pattern gone away" */
 };
 
 /*
  * Values for setting a clock source with INSN_CONFIG_SET_CLOCK_SRC for
  * the counter subdevice on the Kolter Electronic PCI-Counter board
  * (ke_counter driver).
  */
 enum ke_counter_clock_source {
 	KE_CLK_20MHZ,	/* internal 20MHz (default) */
 	KE_CLK_4MHZ,	/* internal 4MHz (option) */
 	KE_CLK_EXT	/* external clock on pin 21 of D-Sub */
 };
 
 #endif /* _COMEDI_H */