[thirdparty/kernel/linux.git] / drivers / staging / comedi / drivers / dt2814.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * comedi/drivers/dt2814.c
 * Hardware driver for Data Translation DT2814
 *
 * COMEDI - Linux Control and Measurement Device Interface
 * Copyright (C) 1998 David A. Schleef <ds@schleef.org>
 */
/*
 * Driver: dt2814
 * Description: Data Translation DT2814
 * Author: ds
 * Status: complete
 * Devices: [Data Translation] DT2814 (dt2814)
 *
 * Configuration options:
 * [0] - I/O port base address
 * [1] - IRQ
 *
 * This card has 16 analog inputs multiplexed onto a 12 bit ADC.  There
 * is a minimally useful onboard clock.  The base frequency for the
 * clock is selected by jumpers, and the clock divider can be selected
 * via programmed I/O.  Unfortunately, the clock divider can only be
 * a power of 10, from 1 to 10^7, of which only 3 or 4 are useful.  In
 * addition, the clock does not seem to be very accurate.
 */

#include <linux/module.h>
#include <linux/interrupt.h>
#include "../comedidev.h"

#include <linux/delay.h>

#define DT2814_CSR 0
#define DT2814_DATA 1

/*
 * flags
 */

#define DT2814_FINISH 0x80
#define DT2814_ERR 0x40
#define DT2814_BUSY 0x20
#define DT2814_ENB 0x10
#define DT2814_CHANMASK 0x0f

struct dt2814_private {
	int ntrig;
	int curadchan;
};

#define DT2814_TIMEOUT 10
#define DT2814_MAX_SPEED 100000	/* Arbitrary 10 khz limit */

static int dt2814_ai_notbusy(struct comedi_device *dev,
			     struct comedi_subdevice *s,
			     struct comedi_insn *insn,
			     unsigned long context)
{
	unsigned int status;

	status = inb(dev->iobase + DT2814_CSR);
	if (context)
		*(unsigned int *)context = status;
	if (status & DT2814_BUSY)
		return -EBUSY;
	return 0;
}

static int dt2814_ai_clear(struct comedi_device *dev)
{
	unsigned int status = 0;
	int ret;

	/* Wait until not busy and get status register value. */
	ret = comedi_timeout(dev, NULL, NULL, dt2814_ai_notbusy,
			     (unsigned long)&status);
	if (ret)
		return ret;

	if (status & (DT2814_FINISH | DT2814_ERR)) {
		/*
		 * There unread data, or the error flag is set.
		 * Read the data register twice to clear the condition.
		 */
		inb(dev->iobase + DT2814_DATA);
		inb(dev->iobase + DT2814_DATA);
	}
	return 0;
}

static int dt2814_ai_eoc(struct comedi_device *dev,
			 struct comedi_subdevice *s,
			 struct comedi_insn *insn,
			 unsigned long context)
{
	unsigned int status;

	status = inb(dev->iobase + DT2814_CSR);
	if (status & DT2814_FINISH)
		return 0;
	return -EBUSY;
}

static int dt2814_ai_insn_read(struct comedi_device *dev,
			       struct comedi_subdevice *s,
			       struct comedi_insn *insn, unsigned int *data)
{
	int n, hi, lo;
	int chan;
	int ret;

	dt2814_ai_clear(dev);	/* clear stale data or error */
	for (n = 0; n < insn->n; n++) {
		chan = CR_CHAN(insn->chanspec);

		outb(chan, dev->iobase + DT2814_CSR);

		ret = comedi_timeout(dev, s, insn, dt2814_ai_eoc, 0);
		if (ret)
			return ret;

		hi = inb(dev->iobase + DT2814_DATA);
		lo = inb(dev->iobase + DT2814_DATA);

		data[n] = (hi << 4) | (lo >> 4);
	}

	return n;
}

static int dt2814_ns_to_timer(unsigned int *ns, unsigned int flags)
{
	int i;
	unsigned int f;

	/* XXX ignores flags */

	f = 10000;		/* ns */
	for (i = 0; i < 8; i++) {
		if ((2 * (*ns)) < (f * 11))
			break;
		f *= 10;
	}

	*ns = f;

	return i;
}

static int dt2814_ai_cmdtest(struct comedi_device *dev,
			     struct comedi_subdevice *s, struct comedi_cmd *cmd)
{
	int err = 0;
	unsigned int arg;

	/* Step 1 : check if triggers are trivially valid */

	err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
	err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER);
	err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
	err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
	err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);

	if (err)
		return 1;

	/* Step 2a : make sure trigger sources are unique */

	err |= comedi_check_trigger_is_unique(cmd->stop_src);

	/* Step 2b : and mutually compatible */

	if (err)
		return 2;

	/* Step 3: check if arguments are trivially valid */

	err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);

	err |= comedi_check_trigger_arg_max(&cmd->scan_begin_arg, 1000000000);
	err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
					    DT2814_MAX_SPEED);

	err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
					   cmd->chanlist_len);

	if (cmd->stop_src == TRIG_COUNT)
		err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 2);
	else	/* TRIG_NONE */
		err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);

	if (err)
		return 3;

	/* step 4: fix up any arguments */

	arg = cmd->scan_begin_arg;
	dt2814_ns_to_timer(&arg, cmd->flags);
	err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg);

	if (err)
		return 4;

	return 0;
}

static int dt2814_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
{
	struct dt2814_private *devpriv = dev->private;
	struct comedi_cmd *cmd = &s->async->cmd;
	int chan;
	int trigvar;

	dt2814_ai_clear(dev);	/* clear stale data or error */
	trigvar = dt2814_ns_to_timer(&cmd->scan_begin_arg, cmd->flags);

	chan = CR_CHAN(cmd->chanlist[0]);

	devpriv->ntrig = cmd->stop_arg;
	outb(chan | DT2814_ENB | (trigvar << 5), dev->iobase + DT2814_CSR);

	return 0;
}

static int dt2814_ai_cancel(struct comedi_device *dev,
			    struct comedi_subdevice *s)
{
	unsigned int status;
	unsigned long flags;

	spin_lock_irqsave(&dev->spinlock, flags);
	status = inb(dev->iobase + DT2814_CSR);
	if (status & DT2814_ENB) {
		/*
		 * Clear the timed trigger enable bit.
		 *
		 * Note: turning off timed mode triggers another
		 * sample.  This will be mopped up by the calls to
		 * dt2814_ai_clear().
		 */
		outb(status & DT2814_CHANMASK, dev->iobase + DT2814_CSR);
	}
	spin_unlock_irqrestore(&dev->spinlock, flags);
	return 0;
}

static irqreturn_t dt2814_interrupt(int irq, void *d)
{
	struct comedi_device *dev = d;
	struct comedi_subdevice *s = dev->read_subdev;
	struct comedi_async *async;
	unsigned int lo, hi;
	unsigned short data;
	unsigned int status;

	if (!dev->attached) {
		dev_err(dev->class_dev, "spurious interrupt\n");
		return IRQ_HANDLED;
	}

	async = s->async;

	spin_lock(&dev->spinlock);

	status = inb(dev->iobase + DT2814_CSR);
	if (!(status & DT2814_ENB)) {
		/* Timed acquisition not enabled.  Nothing to do. */
		spin_unlock(&dev->spinlock);
		return IRQ_HANDLED;
	}

	if (!(status & (DT2814_FINISH | DT2814_ERR))) {
		/* Spurious interrupt? */
		spin_unlock(&dev->spinlock);
		return IRQ_HANDLED;
	}

	/* Read data or clear error. */
	hi = inb(dev->iobase + DT2814_DATA);
	lo = inb(dev->iobase + DT2814_DATA);

	data = (hi << 4) | (lo >> 4);

	if (status & DT2814_ERR) {
		async->events |= COMEDI_CB_ERROR;
	} else {
		comedi_buf_write_samples(s, &data, 1);
		if (async->cmd.stop_src == TRIG_COUNT &&
		    async->scans_done >=  async->cmd.stop_arg) {
			async->events |= COMEDI_CB_EOA;
		}
	}
	if (async->events & COMEDI_CB_CANCEL_MASK) {
		/*
		 * Disable timed mode.
		 *
		 * Note: turning off timed mode triggers another
		 * sample.  This will be mopped up by the calls to
		 * dt2814_ai_clear().
		 */
		outb(status & DT2814_CHANMASK, dev->iobase + DT2814_CSR);
	}

	spin_unlock(&dev->spinlock);

	comedi_handle_events(dev, s);
	return IRQ_HANDLED;
}

static int dt2814_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
	struct dt2814_private *devpriv;
	struct comedi_subdevice *s;
	int ret;

	ret = comedi_request_region(dev, it->options[0], 0x2);
	if (ret)
		return ret;

	outb(0, dev->iobase + DT2814_CSR);
	if (dt2814_ai_clear(dev)) {
		dev_err(dev->class_dev, "reset error (fatal)\n");
		return -EIO;
	}

	if (it->options[1]) {
		ret = request_irq(it->options[1], dt2814_interrupt, 0,
				  dev->board_name, dev);
		if (ret == 0)
			dev->irq = it->options[1];
	}

	ret = comedi_alloc_subdevices(dev, 1);
	if (ret)
		return ret;

	devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
	if (!devpriv)
		return -ENOMEM;

	s = &dev->subdevices[0];
	s->type = COMEDI_SUBD_AI;
	s->subdev_flags = SDF_READABLE | SDF_GROUND;
	s->n_chan = 16;		/* XXX */
	s->insn_read = dt2814_ai_insn_read;
	s->maxdata = 0xfff;
	s->range_table = &range_unknown;	/* XXX */
	if (dev->irq) {
		dev->read_subdev = s;
		s->subdev_flags |= SDF_CMD_READ;
		s->len_chanlist = 1;
		s->do_cmd = dt2814_ai_cmd;
		s->do_cmdtest = dt2814_ai_cmdtest;
		s->cancel = dt2814_ai_cancel;
	}

	return 0;
}

static struct comedi_driver dt2814_driver = {
	.driver_name	= "dt2814",
	.module		= THIS_MODULE,
	.attach		= dt2814_attach,
	.detach		= comedi_legacy_detach,
};
module_comedi_driver(dt2814_driver);

MODULE_AUTHOR("Comedi https://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
e184e2be	1	// SPDX-License-Identifier: GPL-2.0+
a211ea97	2	/*
6adb21c2 RKM	3	* comedi/drivers/dt2814.c
	4	* Hardware driver for Data Translation DT2814
	5	*
	6	* COMEDI - Linux Control and Measurement Device Interface
	7	* Copyright (C) 1998 David A. Schleef <ds@schleef.org>
6adb21c2	8	*/
a211ea97	9	/*
6adb21c2 RKM	10	* Driver: dt2814
	11	* Description: Data Translation DT2814
	12	* Author: ds
	13	* Status: complete
	14	* Devices: [Data Translation] DT2814 (dt2814)
	15	*
	16	* Configuration options:
	17	* [0] - I/O port base address
	18	* [1] - IRQ
	19	*
	20	* This card has 16 analog inputs multiplexed onto a 12 bit ADC. There
	21	* is a minimally useful onboard clock. The base frequency for the
	22	* clock is selected by jumpers, and the clock divider can be selected
	23	* via programmed I/O. Unfortunately, the clock divider can only be
	24	* a power of 10, from 1 to 10^7, of which only 3 or 4 are useful. In
	25	* addition, the clock does not seem to be very accurate.
	26	*/
a211ea97	27
ce157f80	28	#include <linux/module.h>
25436dc9	29	#include <linux/interrupt.h>
a211ea97 DS	30	#include "../comedidev.h"
a211ea97 DS	31
a211ea97 DS	32	#include <linux/delay.h>
a211ea97 DS	33
a211ea97 DS	34	#define DT2814_CSR 0
	35	#define DT2814_DATA 1
	36
	37	/*
	38	* flags
	39	*/
	40
	41	#define DT2814_FINISH 0x80
	42	#define DT2814_ERR 0x40
	43	#define DT2814_BUSY 0x20
	44	#define DT2814_ENB 0x10
	45	#define DT2814_CHANMASK 0x0f
	46
ca6f10ca	47	struct dt2814_private {
a211ea97 DS	48	int ntrig;
a211ea97 DS	49	int curadchan;
ca6f10ca BP	50	};
ca6f10ca BP	51
a211ea97 DS	52	#define DT2814_TIMEOUT 10
	53	#define DT2814_MAX_SPEED 100000 /* Arbitrary 10 khz limit */
	54
7a3f3a70 IA	55	static int dt2814_ai_notbusy(struct comedi_device *dev,
	56	struct comedi_subdevice *s,
	57	struct comedi_insn *insn,
	58	unsigned long context)
	59	{
	60	unsigned int status;
	61
	62	status = inb(dev->iobase + DT2814_CSR);
	63	if (context)
	64	(unsigned int )context = status;
	65	if (status & DT2814_BUSY)
	66	return -EBUSY;
	67	return 0;
	68	}
	69
	70	static int dt2814_ai_clear(struct comedi_device *dev)
	71	{
	72	unsigned int status = 0;
	73	int ret;
	74
	75	/* Wait until not busy and get status register value. */
	76	ret = comedi_timeout(dev, NULL, NULL, dt2814_ai_notbusy,
	77	(unsigned long)&status);
	78	if (ret)
	79	return ret;
	80
	81	if (status & (DT2814_FINISH \| DT2814_ERR)) {
	82	/*
	83	* There unread data, or the error flag is set.
	84	* Read the data register twice to clear the condition.
	85	*/
	86	inb(dev->iobase + DT2814_DATA);
	87	inb(dev->iobase + DT2814_DATA);
	88	}
	89	return 0;
	90	}
	91
82c7e864 HS	92	static int dt2814_ai_eoc(struct comedi_device *dev,
	93	struct comedi_subdevice *s,
	94	struct comedi_insn *insn,
	95	unsigned long context)
	96	{
	97	unsigned int status;
	98
	99	status = inb(dev->iobase + DT2814_CSR);
	100	if (status & DT2814_FINISH)
	101	return 0;
	102	return -EBUSY;
	103	}
	104
0a85b6f0 MT	105	static int dt2814_ai_insn_read(struct comedi_device *dev,
	106	struct comedi_subdevice *s,
	107	struct comedi_insn insn, unsigned int data)
a211ea97	108	{
82c7e864	109	int n, hi, lo;
a211ea97	110	int chan;
82c7e864	111	int ret;
a211ea97	112
7a3f3a70	113	dt2814_ai_clear(dev); /* clear stale data or error */
a211ea97 DS	114	for (n = 0; n < insn->n; n++) {
	115	chan = CR_CHAN(insn->chanspec);
	116
	117	outb(chan, dev->iobase + DT2814_CSR);
82c7e864 HS	118
	119	ret = comedi_timeout(dev, s, insn, dt2814_ai_eoc, 0);
	120	if (ret)
	121	return ret;
a211ea97 DS	122
	123	hi = inb(dev->iobase + DT2814_DATA);
	124	lo = inb(dev->iobase + DT2814_DATA);
	125
	126	data[n] = (hi << 4) \| (lo >> 4);
	127	}
	128
	129	return n;
	130	}
	131
	132	static int dt2814_ns_to_timer(unsigned int *ns, unsigned int flags)
	133	{
	134	int i;
	135	unsigned int f;
	136
	137	/* XXX ignores flags */
	138
	139	f = 10000; /* ns */
	140	for (i = 0; i < 8; i++) {
	141	if ((2 * (ns)) < (f 11))
	142	break;
	143	f *= 10;
	144	}
	145
	146	*ns = f;
	147
	148	return i;
	149	}
	150
0a85b6f0 MT	151	static int dt2814_ai_cmdtest(struct comedi_device *dev,
0a85b6f0 MT	152	struct comedi_subdevice s, struct comedi_cmd cmd)
a211ea97 DS	153	{
a211ea97 DS	154	int err = 0;
704b0050	155	unsigned int arg;
a211ea97	156
27020ffe	157	/* Step 1 : check if triggers are trivially valid */
a211ea97	158
71bb49d0 IA	159	err \|= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
	160	err \|= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER);
	161	err \|= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
	162	err \|= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
	163	err \|= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT \| TRIG_NONE);
a211ea97 DS	164
	165	if (err)
	166	return 1;
	167
27020ffe	168	/* Step 2a : make sure trigger sources are unique */
a211ea97	169
71bb49d0	170	err \|= comedi_check_trigger_is_unique(cmd->stop_src);
27020ffe HS	171
27020ffe HS	172	/* Step 2b : and mutually compatible */
a211ea97 DS	173
	174	if (err)
	175	return 2;
	176
2345dc8b	177	/* Step 3: check if arguments are trivially valid */
a211ea97	178
71bb49d0	179	err \|= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
2345dc8b	180
71bb49d0 IA	181	err \|= comedi_check_trigger_arg_max(&cmd->scan_begin_arg, 1000000000);
	182	err \|= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
	183	DT2814_MAX_SPEED);
2345dc8b	184
71bb49d0 IA	185	err \|= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
71bb49d0 IA	186	cmd->chanlist_len);
2345dc8b HS	187
2345dc8b HS	188	if (cmd->stop_src == TRIG_COUNT)
71bb49d0	189	err \|= comedi_check_trigger_arg_min(&cmd->stop_arg, 2);
2345dc8b	190	else /* TRIG_NONE */
71bb49d0	191	err \|= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
a211ea97 DS	192
	193	if (err)
	194	return 3;
	195
	196	/* step 4: fix up any arguments */
	197
704b0050	198	arg = cmd->scan_begin_arg;
a207c12f	199	dt2814_ns_to_timer(&arg, cmd->flags);
71bb49d0	200	err \|= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
a211ea97 DS	201
	202	if (err)
	203	return 4;
	204
	205	return 0;
	206	}
	207
da91b269	208	static int dt2814_ai_cmd(struct comedi_device dev, struct comedi_subdevice s)
a211ea97	209	{
9a1a6cf8	210	struct dt2814_private *devpriv = dev->private;
ea6d0d4c	211	struct comedi_cmd *cmd = &s->async->cmd;
a211ea97 DS	212	int chan;
	213	int trigvar;
	214
7a3f3a70	215	dt2814_ai_clear(dev); /* clear stale data or error */
a207c12f	216	trigvar = dt2814_ns_to_timer(&cmd->scan_begin_arg, cmd->flags);
a211ea97 DS	217
	218	chan = CR_CHAN(cmd->chanlist[0]);
	219
	220	devpriv->ntrig = cmd->stop_arg;
	221	outb(chan \| DT2814_ENB \| (trigvar << 5), dev->iobase + DT2814_CSR);
	222
	223	return 0;
a211ea97 DS	224	}
a211ea97 DS	225
3d7b3101 IA	226	static int dt2814_ai_cancel(struct comedi_device *dev,
	227	struct comedi_subdevice *s)
	228	{
	229	unsigned int status;
	230	unsigned long flags;
	231
	232	spin_lock_irqsave(&dev->spinlock, flags);
	233	status = inb(dev->iobase + DT2814_CSR);
	234	if (status & DT2814_ENB) {
	235	/*
	236	* Clear the timed trigger enable bit.
	237	*
	238	* Note: turning off timed mode triggers another
	239	* sample. This will be mopped up by the calls to
	240	* dt2814_ai_clear().
	241	*/
	242	outb(status & DT2814_CHANMASK, dev->iobase + DT2814_CSR);
	243	}
	244	spin_unlock_irqrestore(&dev->spinlock, flags);
	245	return 0;
	246	}
	247
7806012e HS	248	static irqreturn_t dt2814_interrupt(int irq, void *d)
7806012e HS	249	{
7806012e	250	struct comedi_device *dev = d;
89d48385	251	struct comedi_subdevice *s = dev->read_subdev;
3d7b3101 IA	252	struct comedi_async *async;
	253	unsigned int lo, hi;
	254	unsigned short data;
	255	unsigned int status;
7806012e HS	256
7806012e HS	257	if (!dev->attached) {
dffe87cd	258	dev_err(dev->class_dev, "spurious interrupt\n");
7806012e HS	259	return IRQ_HANDLED;
	260	}
	261
3d7b3101	262	async = s->async;
7806012e	263
3d7b3101 IA	264	spin_lock(&dev->spinlock);
	265
	266	status = inb(dev->iobase + DT2814_CSR);
	267	if (!(status & DT2814_ENB)) {
	268	/* Timed acquisition not enabled. Nothing to do. */
	269	spin_unlock(&dev->spinlock);
	270	return IRQ_HANDLED;
	271	}
	272
	273	if (!(status & (DT2814_FINISH \| DT2814_ERR))) {
	274	/* Spurious interrupt? */
	275	spin_unlock(&dev->spinlock);
	276	return IRQ_HANDLED;
	277	}
	278
	279	/* Read data or clear error. */
	280	hi = inb(dev->iobase + DT2814_DATA);
	281	lo = inb(dev->iobase + DT2814_DATA);
	282
	283	data = (hi << 4) \| (lo >> 4);
	284
	285	if (status & DT2814_ERR) {
	286	async->events \|= COMEDI_CB_ERROR;
	287	} else {
	288	comedi_buf_write_samples(s, &data, 1);
	289	if (async->cmd.stop_src == TRIG_COUNT &&
	290	async->scans_done >= async->cmd.stop_arg) {
	291	async->events \|= COMEDI_CB_EOA;
	292	}
	293	}
	294	if (async->events & COMEDI_CB_CANCEL_MASK) {
6adb21c2	295	/*
3d7b3101 IA	296	* Disable timed mode.
3d7b3101 IA	297	*
46ffba06 IA	298	* Note: turning off timed mode triggers another
	299	* sample. This will be mopped up by the calls to
	300	* dt2814_ai_clear().
6adb21c2	301	*/
3d7b3101	302	outb(status & DT2814_CHANMASK, dev->iobase + DT2814_CSR);
7806012e	303	}
3d7b3101 IA	304
	305	spin_unlock(&dev->spinlock);
	306
001cce48	307	comedi_handle_events(dev, s);
7806012e HS	308	return IRQ_HANDLED;
	309	}
	310
da91b269	311	static int dt2814_attach(struct comedi_device dev, struct comedi_devconfig it)
a211ea97	312	{
9a1a6cf8	313	struct dt2814_private *devpriv;
34c43922	314	struct comedi_subdevice *s;
c5a9595b	315	int ret;
a211ea97	316
862755ec	317	ret = comedi_request_region(dev, it->options[0], 0x2);
c5c18cd3 HS	318	if (ret)
c5c18cd3 HS	319	return ret;
a211ea97 DS	320
a211ea97 DS	321	outb(0, dev->iobase + DT2814_CSR);
5fc336c6	322	if (dt2814_ai_clear(dev)) {
323cd355	323	dev_err(dev->class_dev, "reset error (fatal)\n");
a211ea97 DS	324	return -EIO;
a211ea97 DS	325	}
a211ea97	326
c5a9595b HS	327	if (it->options[1]) {
	328	ret = request_irq(it->options[1], dt2814_interrupt, 0,
	329	dev->board_name, dev);
	330	if (ret == 0)
	331	dev->irq = it->options[1];
a211ea97 DS	332	}
a211ea97 DS	333
2f0b9d08	334	ret = comedi_alloc_subdevices(dev, 1);
8b6c5694	335	if (ret)
a211ea97	336	return ret;
c3744138	337
0bdab509	338	devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
c34fa261 HS	339	if (!devpriv)
c34fa261 HS	340	return -ENOMEM;
a211ea97	341
92af10e1	342	s = &dev->subdevices[0];
a211ea97	343	s->type = COMEDI_SUBD_AI;
c5a9595b	344	s->subdev_flags = SDF_READABLE \| SDF_GROUND;
a211ea97	345	s->n_chan = 16; /* XXX */
a211ea97	346	s->insn_read = dt2814_ai_insn_read;
a211ea97 DS	347	s->maxdata = 0xfff;
a211ea97 DS	348	s->range_table = &range_unknown; /* XXX */
c5a9595b HS	349	if (dev->irq) {
	350	dev->read_subdev = s;
	351	s->subdev_flags \|= SDF_CMD_READ;
	352	s->len_chanlist = 1;
	353	s->do_cmd = dt2814_ai_cmd;
	354	s->do_cmdtest = dt2814_ai_cmdtest;
3d7b3101	355	s->cancel = dt2814_ai_cancel;
c5a9595b	356	}
a211ea97 DS	357
	358	return 0;
	359	}
	360
7806012e HS	361	static struct comedi_driver dt2814_driver = {
	362	.driver_name = "dt2814",
	363	.module = THIS_MODULE,
	364	.attach = dt2814_attach,
3d1fe3f7	365	.detach = comedi_legacy_detach,
7806012e HS	366	};
7806012e HS	367	module_comedi_driver(dt2814_driver);
90f703d3	368
f8cdbd4f	369	MODULE_AUTHOR("Comedi https://www.comedi.org");
90f703d3 AT	370	MODULE_DESCRIPTION("Comedi low-level driver");
90f703d3 AT	371	MODULE_LICENSE("GPL");