/* 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 <[email protected]> */ #ifndef _COMEDI_H #define _COMEDI_H #define COMEDI_MAJORVERSION … #define COMEDI_MINORVERSION … #define COMEDI_MICROVERSION … #define VERSION … /* comedi's major device number */ #define COMEDI_MAJOR … /* * 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 … /* number of config options in the config structure */ #define COMEDI_NDEVCONFOPTS … /* * 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 … #define COMEDI_DEVCONF_AUX_DATA2_LENGTH … #define COMEDI_DEVCONF_AUX_DATA1_LENGTH … #define COMEDI_DEVCONF_AUX_DATA0_LENGTH … /* most significant 32 bits of pointer address (if needed) */ #define COMEDI_DEVCONF_AUX_DATA_HI … /* least significant 32 bits of pointer address */ #define COMEDI_DEVCONF_AUX_DATA_LO … #define COMEDI_DEVCONF_AUX_DATA_LENGTH … /* max length of device and driver names */ #define COMEDI_NAMELEN … /* packs and unpacks a channel/range number */ #define CR_PACK(chan, rng, aref) … #define CR_PACK_FLAGS(chan, range, aref, flags) … #define CR_CHAN(a) … #define CR_RANGE(a) … #define CR_AREF(a) … #define CR_FLAGS_MASK … #define CR_ALT_FILTER … #define CR_DITHER … #define CR_DEGLITCH … #define CR_ALT_SOURCE … #define CR_EDGE … #define CR_INVERT … #define AREF_GROUND … #define AREF_COMMON … #define AREF_DIFF … #define AREF_OTHER … /* counters -- these are arbitrary values */ #define GPCT_RESET … #define GPCT_SET_SOURCE … #define GPCT_SET_GATE … #define GPCT_SET_DIRECTION … #define GPCT_SET_OPERATION … #define GPCT_ARM … #define GPCT_DISARM … #define GPCT_GET_INT_CLK_FRQ … #define GPCT_INT_CLOCK … #define GPCT_EXT_PIN … #define GPCT_NO_GATE … #define GPCT_UP … #define GPCT_DOWN … #define GPCT_HWUD … #define GPCT_SIMPLE_EVENT … #define GPCT_SINGLE_PERIOD … #define GPCT_SINGLE_PW … #define GPCT_CONT_PULSE_OUT … #define GPCT_SINGLE_PULSE_OUT … /* instructions */ #define INSN_MASK_WRITE … #define INSN_MASK_READ … #define INSN_MASK_SPECIAL … #define INSN_READ … #define INSN_WRITE … #define INSN_BITS … #define INSN_CONFIG … #define INSN_DEVICE_CONFIG … #define INSN_GTOD … #define INSN_WAIT … #define INSN_INTTRIG … /* command flags */ /* These flags are used in comedi_cmd structures */ #define CMDF_BOGUS … /* try to use a real-time interrupt while performing command */ #define CMDF_PRIORITY … /* wake up on end-of-scan events */ #define CMDF_WAKE_EOS … #define CMDF_WRITE … #define CMDF_RAWDATA … /* timer rounding definitions */ #define CMDF_ROUND_MASK … #define CMDF_ROUND_NEAREST … #define CMDF_ROUND_DOWN … #define CMDF_ROUND_UP … #define CMDF_ROUND_UP_NEXT … #define COMEDI_EV_START … #define COMEDI_EV_SCAN_BEGIN … #define COMEDI_EV_CONVERT … #define COMEDI_EV_SCAN_END … #define COMEDI_EV_STOP … /* compatibility definitions */ #define TRIG_BOGUS … #define TRIG_RT … #define TRIG_WAKE_EOS … #define TRIG_WRITE … #define TRIG_ROUND_MASK … #define TRIG_ROUND_NEAREST … #define TRIG_ROUND_DOWN … #define TRIG_ROUND_UP … #define TRIG_ROUND_UP_NEXT … /* trigger sources */ #define TRIG_ANY … #define TRIG_INVALID … #define TRIG_NONE … #define TRIG_NOW … #define TRIG_FOLLOW … #define TRIG_TIME … #define TRIG_TIMER … #define TRIG_COUNT … #define TRIG_EXT … #define TRIG_INT … #define TRIG_OTHER … /* subdevice flags */ #define SDF_BUSY … #define SDF_BUSY_OWNER … #define SDF_LOCKED … #define SDF_LOCK_OWNER … #define SDF_MAXDATA … #define SDF_FLAGS … #define SDF_RANGETYPE … #define SDF_PWM_COUNTER … #define SDF_PWM_HBRIDGE … #define SDF_CMD … #define SDF_SOFT_CALIBRATED … #define SDF_CMD_WRITE … #define SDF_CMD_READ … /* subdevice can be read (e.g. analog input) */ #define SDF_READABLE … /* subdevice can be written (e.g. analog output) */ #define SDF_WRITABLE … #define SDF_WRITEABLE … /* subdevice does not have externally visible lines */ #define SDF_INTERNAL … #define SDF_GROUND … #define SDF_COMMON … #define SDF_DIFF … #define SDF_OTHER … #define SDF_DITHER … #define SDF_DEGLITCH … #define SDF_MMAP … #define SDF_RUNNING … #define SDF_LSAMPL … #define SDF_PACKED … /* 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 { … }; /* 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 { … }; /** * 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 { … }; /** * 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 { … }; /** * 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 { … }; /** * 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 { … }; /** * 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 { … }; /* ioctls */ #define CIO … #define COMEDI_DEVCONFIG … #define COMEDI_DEVINFO … #define COMEDI_SUBDINFO … #define COMEDI_CHANINFO … /* _IOWR(CIO, 4, ...) is reserved */ #define COMEDI_LOCK … #define COMEDI_UNLOCK … #define COMEDI_CANCEL … #define COMEDI_RANGEINFO … #define COMEDI_CMD … #define COMEDI_CMDTEST … #define COMEDI_INSNLIST … #define COMEDI_INSN … #define COMEDI_BUFCONFIG … #define COMEDI_BUFINFO … #define COMEDI_POLL … #define COMEDI_SETRSUBD … #define COMEDI_SETWSUBD … /* 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 { … }; /** * 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 { … }; /** * 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 { … }; /** * 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 { … }; /** * 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 { … }; /** * 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 { … }; /** * 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 { … }; /** * 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 { … }; /** * 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 { … }; /** * 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 { … }; /** * 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 { … }; /* range stuff */ #define __RANGE(a, b) … #define RANGE_OFFSET(a) … #define RANGE_LENGTH(b) … #define RF_UNIT(flags) … #define RF_EXTERNAL … #define UNIT_volt … #define UNIT_mA … #define UNIT_none … #define COMEDI_MIN_SPEED … /**********************************************************/ /* 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 { … }; /* *** 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 … #define _TERM_N(base, n, x) … /* * not necessarily all allowed 64 PFIs are valid--certainly not for all devices */ #define NI_PFI(x) … /* 8 trigger lines by standard, Some devices cannot talk to all eight. */ #define TRIGGER_LINE(x) … /* 4 RTSI shared MUXes to route signals to/from TRIGGER_LINES on NI hardware */ #define NI_RTSI_BRD(x) … /* *** Counter/timer names : 8 counters max *** */ #define NI_MAX_COUNTERS … #define NI_COUNTER_NAMES_BASE … #define NI_CtrSource(x) … /* Gate, Aux, A,B,Z are all treated, at times as gates */ #define NI_GATES_NAMES_BASE … #define NI_CtrGate(x) … #define NI_CtrAux(x) … #define NI_CtrA(x) … #define NI_CtrB(x) … #define NI_CtrZ(x) … #define NI_GATES_NAMES_MAX … #define NI_CtrArmStartTrigger(x) … #define NI_CtrInternalOutput(x) … /** external pin(s) labeled conveniently as Ctr<i>Out. */ #define NI_CtrOut(x) … /** For Buffered sampling of ctr -- x series capability. */ #define NI_CtrSampleClock(x) … #define NI_COUNTER_NAMES_MAX … enum ni_common_signal_names { … }; /* *** END GLOBALLY-NAMED NI TERMINALS/SIGNALS *** */ #define NI_USUAL_PFI_SELECT(x) … #define NI_USUAL_RTSI_SELECT(x) … /* * mode bits for NI general-purpose counters, set with * INSN_CONFIG_SET_COUNTER_MODE */ #define NI_GPCT_COUNTING_MODE_SHIFT … #define NI_GPCT_INDEX_PHASE_BITSHIFT … #define NI_GPCT_COUNTING_DIRECTION_SHIFT … enum ni_gpct_mode_bits { … }; /* * 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 660x-specific */ #define NI_GPCT_SOURCE_PIN_CLOCK_SRC_BITS(x) … #define NI_GPCT_RTSI_CLOCK_SRC_BITS(x) … /* no pfi on NI 660x */ #define NI_GPCT_PFI_CLOCK_SRC_BITS(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 { … }; #define NI_GPCT_GATE_PIN_GATE_SELECT(x) … #define NI_GPCT_RTSI_GATE_SELECT(x) … #define NI_GPCT_PFI_GATE_SELECT(x) … #define NI_GPCT_UP_DOWN_PIN_GATE_SELECT(x) … /* * Possibilities for setting a source with * INSN_CONFIG_SET_OTHER_SRC when using NI general-purpose counters. */ enum ni_gpct_other_index { … }; enum ni_gpct_other_select { … }; #define NI_GPCT_PFI_OTHER_SELECT(x) … /* * start sources for ni general-purpose counters for use with * INSN_CONFIG_ARM */ enum ni_gpct_arm_source { … }; /* digital filtering options for ni 660x for use with INSN_CONFIG_FILTER. */ enum ni_gpct_filter_select { … }; /* * PFI digital filtering options for ni m-series for use with * INSN_CONFIG_FILTER. */ enum ni_pfi_filter_select { … }; /* master clock sources for ni mio boards and INSN_CONFIG_SET_CLOCK_SRC */ enum ni_mio_clock_source { … }; #define NI_MIO_PLL_RTSI_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 { … }; #define NI_RTSI_OUTPUT_RTSI_BRD(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 { … }; #define NI_PFI_OUTPUT_RTSI(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 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) … #define NI_EXT_RTSI(x) … /* * 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 { … }; #define NI_CDIO_SCAN_BEGIN_SRC_PFI(x) … #define NI_CDIO_SCAN_BEGIN_SRC_RTSI(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) … #define NI_AO_SCAN_BEGIN_SRC_RTSI(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 { … }; /* * 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 { … }; /* * 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 { … }; /* * 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 { … }; /* * 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 { … }; #endif /* _COMEDI_H */
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