FM / linux

/usr/include/linux

Name	Size	Mode	Actions
android/	-	0755	rm
byteorder/	-	0755	rm
caif/	-	0755	rm
can/	-	0755	rm
cifs/	-	0755	rm
dvb/	-	0755	rm
genwqe/	-	0755	rm
hdlc/	-	0755	rm
hsi/	-	0755	rm
iio/	-	0755	rm
isdn/	-	0755	rm
media/	-	0755	rm
misc/	-	0755	rm
mmc/	-	0755	rm
netfilter/	-	0755	rm
netfilter_arp/	-	0755	rm
netfilter_bridge/	-	0755	rm
netfilter_ipv4/	-	0755	rm
netfilter_ipv6/	-	0755	rm
nfsd/	-	0755	rm
raid/	-	0755	rm
sched/	-	0755	rm
spi/	-	0755	rm
sunrpc/	-	0755	rm
surface_aggregator/	-	0755	rm
tc_act/	-	0755	rm
tc_ematch/	-	0755	rm
usb/	-	0755	rm
a.out.h	6892	0644	edit dl rm
acct.h	3913	0644	edit dl rm
acrn.h	18956	0644	edit dl rm
adb.h	1140	0644	edit dl rm
adfs_fs.h	993	0644	edit dl rm
affs_hardblocks.h	1578	0644	edit dl rm
agpgart.h	3955	0644	edit dl rm
aio_abi.h	3398	0644	edit dl rm
am437x-vpfe.h	3681	0644	edit dl rm
amt.h	1747	0644	edit dl rm
apm_bios.h	3683	0644	edit dl rm
arcfb.h	213	0644	edit dl rm
arm_sdei.h	2751	0644	edit dl rm
aspeed-lpc-ctrl.h	1780	0644	edit dl rm
aspeed-p2a-ctrl.h	1906	0644	edit dl rm
aspeed-video.h	389	0644	edit dl rm
atalk.h	1023	0644	edit dl rm
atm.h	7888	0644	edit dl rm
atmapi.h	952	0644	edit dl rm
atmarp.h	1296	0644	edit dl rm
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atmsvc.h	1853	0644	edit dl rm
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atm_tcp.h	1622	0644	edit dl rm
atm_zatm.h	1540	0644	edit dl rm
audit.h	21744	0644	edit dl rm
auto_dev-ioctl.h	4985	0644	edit dl rm
auto_fs.h	6428	0644	edit dl rm
auto_fs4.h	451	0644	edit dl rm
auxvec.h	1819	0644	edit dl rm
ax25.h	2824	0644	edit dl rm
batadv_packet.h	21632	0644	edit dl rm
batman_adv.h	16887	0644	edit dl rm
baycom.h	883	0644	edit dl rm
bcm933xx_hcs.h	419	0644	edit dl rm
bfs_fs.h	1905	0644	edit dl rm
binfmts.h	776	0644	edit dl rm
bits.h	517	0644	edit dl rm
blkdev.h	359	0644	edit dl rm
blkpg.h	904	0644	edit dl rm
blktrace_api.h	4701	0644	edit dl rm
blkzoned.h	6492	0644	edit dl rm
bpf.h	280344	0644	edit dl rm
bpf_common.h	1367	0644	edit dl rm
bpf_perf_event.h	529	0644	edit dl rm
bpqether.h	981	0644	edit dl rm
bsg.h	2494	0644	edit dl rm
bt-bmc.h	572	0644	edit dl rm
btf.h	5591	0644	edit dl rm
btrfs.h	37150	0644	edit dl rm
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cachefiles.h	1650	0644	edit dl rm
can.h	11496	0644	edit dl rm
capability.h	13523	0644	edit dl rm
capi.h	3124	0644	edit dl rm
cciss_defs.h	3281	0644	edit dl rm
cciss_ioctl.h	2761	0644	edit dl rm
ccs.h	767	0644	edit dl rm
cdrom.h	29561	0644	edit dl rm
cec-funcs.h	54419	0644	edit dl rm
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cfm_bridge.h	1456	0644	edit dl rm
cgroupstats.h	2105	0644	edit dl rm
chio.h	5282	0644	edit dl rm
close_range.h	377	0644	edit dl rm
cn_proc.h	4160	0644	edit dl rm
coda.h	18216	0644	edit dl rm
coff.h	12549	0644	edit dl rm
comedi.h	55481	0644	edit dl rm
connector.h	2252	0644	edit dl rm
const.h	1587	0644	edit dl rm
coresight-stm.h	747	0644	edit dl rm
counter.h	4889	0644	edit dl rm
cramfs_fs.h	3555	0644	edit dl rm
cryptouser.h	5812	0644	edit dl rm
cuda.h	905	0644	edit dl rm
cxl_mem.h	8143	0644	edit dl rm
cyclades.h	969	0644	edit dl rm
cycx_cfm.h	2989	0644	edit dl rm
dcbnl.h	25571	0644	edit dl rm
dccp.h	6436	0644	edit dl rm
devlink.h	22832	0644	edit dl rm
dlm.h	2664	0644	edit dl rm
dlmconstants.h	5091	0644	edit dl rm
dlm_device.h	2541	0644	edit dl rm
dlm_plock.h	916	0644	edit dl rm
dm-ioctl.h	11598	0644	edit dl rm
dm-log-userspace.h	15190	0644	edit dl rm
dma-buf.h	7347	0644	edit dl rm
dma-heap.h	1397	0644	edit dl rm
dns_resolver.h	3949	0644	edit dl rm
dpll.h	8356	0644	edit dl rm
dqblk_xfs.h	9388	0644	edit dl rm
dw100.h	357	0644	edit dl rm
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elf-em.h	2627	0644	edit dl rm
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elf.h	15677	0644	edit dl rm
errno.h	23	0644	edit dl rm
errqueue.h	1983	0644	edit dl rm
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eventfd.h	264	0644	edit dl rm
eventpoll.h	2912	0644	edit dl rm
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ext4.h	4122	0644	edit dl rm
f2fs.h	3363	0644	edit dl rm
fadvise.h	842	0644	edit dl rm
falloc.h	3643	0644	edit dl rm
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fb.h	16335	0644	edit dl rm
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fd.h	12117	0644	edit dl rm
fdreg.h	5364	0644	edit dl rm
fib_rules.h	2058	0644	edit dl rm
fiemap.h	2774	0644	edit dl rm
filter.h	2216	0644	edit dl rm
firewire-cdev.h	50720	0644	edit dl rm
firewire-constants.h	3231	0644	edit dl rm
fou.h	819	0644	edit dl rm
fpga-dfl.h	8728	0644	edit dl rm
fs.h	21733	0644	edit dl rm
fscrypt.h	6592	0644	edit dl rm
fsi.h	3088	0644	edit dl rm
fsl_hypervisor.h	7301	0644	edit dl rm
fsl_mc.h	734	0644	edit dl rm
fsmap.h	4402	0644	edit dl rm
fsverity.h	3185	0644	edit dl rm
fuse.h	29504	0644	edit dl rm
futex.h	6127	0644	edit dl rm
gameport.h	897	0644	edit dl rm
genetlink.h	2238	0644	edit dl rm
gen_stats.h	1526	0644	edit dl rm
gfs2_ondisk.h	14773	0644	edit dl rm
gpio.h	20297	0644	edit dl rm
gsmmux.h	4509	0644	edit dl rm
gtp.h	782	0644	edit dl rm
handshake.h	1646	0644	edit dl rm
hash_info.h	1034	0644	edit dl rm
hdlc.h	637	0644	edit dl rm
hdlcdrv.h	2908	0644	edit dl rm
hdreg.h	22703	0644	edit dl rm
hid.h	2086	0644	edit dl rm
hiddev.h	6345	0644	edit dl rm
hidraw.h	2114	0644	edit dl rm
hpet.h	743	0644	edit dl rm
hsr_netlink.h	1101	0644	edit dl rm
hw_breakpoint.h	605	0644	edit dl rm
hyperv.h	11176	0644	edit dl rm
i2c-dev.h	1875	0644	edit dl rm
i2c.h	6890	0644	edit dl rm
i2o-dev.h	11555	0644	edit dl rm
i8k.h	1528	0644	edit dl rm
icmp.h	4785	0644	edit dl rm
icmpv6.h	4300	0644	edit dl rm
idxd.h	9328	0644	edit dl rm
if.h	10925	0644	edit dl rm
ife.h	351	0644	edit dl rm
if_addr.h	2143	0644	edit dl rm
if_addrlabel.h	721	0644	edit dl rm
if_alg.h	1601	0644	edit dl rm
if_arcnet.h	3714	0644	edit dl rm
if_arp.h	6589	0644	edit dl rm
if_bonding.h	5145	0644	edit dl rm
if_bridge.h	20666	0644	edit dl rm
if_cablemodem.h	986	0644	edit dl rm
if_eql.h	1349	0644	edit dl rm
if_ether.h	8766	0644	edit dl rm
if_fc.h	1738	0644	edit dl rm
if_fddi.h	4369	0644	edit dl rm
if_hippi.h	4235	0644	edit dl rm
if_infiniband.h	1245	0644	edit dl rm
if_link.h	56005	0644	edit dl rm
if_ltalk.h	210	0644	edit dl rm
if_macsec.h	6503	0644	edit dl rm
if_packet.h	8273	0644	edit dl rm
if_phonet.h	424	0644	edit dl rm
if_plip.h	660	0644	edit dl rm
if_ppp.h	29	0644	edit dl rm
if_pppol2tp.h	3303	0644	edit dl rm
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if_slip.h	872	0644	edit dl rm
if_team.h	1617	0644	edit dl rm
if_tun.h	4315	0644	edit dl rm
if_tunnel.h	5604	0644	edit dl rm
if_vlan.h	1831	0644	edit dl rm
if_x25.h	881	0644	edit dl rm
if_xdp.h	5010	0644	edit dl rm
igmp.h	3061	0644	edit dl rm
ila.h	1246	0644	edit dl rm
in.h	10956	0644	edit dl rm
in6.h	7578	0644	edit dl rm
inet_diag.h	5015	0644	edit dl rm
inotify.h	3289	0644	edit dl rm
input-event-codes.h	30258	0644	edit dl rm
input.h	16217	0644	edit dl rm
in_route.h	936	0644	edit dl rm
ioam6.h	2383	0644	edit dl rm
ioam6_genl.h	1373	0644	edit dl rm
ioam6_iptunnel.h	1428	0644	edit dl rm
ioctl.h	163	0644	edit dl rm
iommufd.h	29804	0644	edit dl rm
ioprio.h	4175	0644	edit dl rm
io_uring.h	22355	0644	edit dl rm
ip.h	4846	0644	edit dl rm
ip6_tunnel.h	1953	0644	edit dl rm
ipc.h	2101	0644	edit dl rm
ipmi.h	15442	0644	edit dl rm
ipmi_bmc.h	488	0644	edit dl rm
ipmi_msgdefs.h	3430	0644	edit dl rm
ipmi_ssif_bmc.h	441	0644	edit dl rm
ipsec.h	947	0644	edit dl rm
ipv6.h	4325	0644	edit dl rm
ipv6_route.h	1908	0644	edit dl rm
ip_vs.h	13962	0644	edit dl rm
irqnr.h	104	0644	edit dl rm
iso_fs.h	6483	0644	edit dl rm
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ivtv.h	3022	0644	edit dl rm
ivtvfb.h	1207	0644	edit dl rm
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joystick.h	3434	0644	edit dl rm
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keyboard.h	13459	0644	edit dl rm
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mpls_iptunnel.h	761	0644	edit dl rm
mptcp.h	3970	0644	edit dl rm
mptcp_pm.h	4590	0644	edit dl rm
mqueue.h	2201	0644	edit dl rm
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mrp_bridge.h	1708	0644	edit dl rm
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mtio.h	8175	0644	edit dl rm
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netconf.h	614	0644	edit dl rm
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netfilter_arp.h	445	0644	edit dl rm
netfilter_bridge.h	1238	0644	edit dl rm
netfilter_ipv4.h	1488	0644	edit dl rm
netfilter_ipv6.h	1383	0644	edit dl rm
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npcm-video.h	1215	0644	edit dl rm
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nvram.h	532	0644	edit dl rm
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serio.h	2139	0644	edit dl rm
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smc_diag.h	2951	0644	edit dl rm
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sysinfo.h	1049	0644	edit dl rm
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taskstats.h	8322	0644	edit dl rm
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Edit: /usr/include/linux/comedi.h (55481B)

/* 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

/* 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 31:24), 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 */

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