[deliverable/linux.git] / drivers / staging / comedi / drivers / comedi_parport.c

/*
    comedi/drivers/comedi_parport.c
    hardware driver for standard parallel port

    COMEDI - Linux Control and Measurement Device Interface
    Copyright (C) 1998,2001 David A. Schleef <ds@schleef.org>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/
/*
Driver: comedi_parport
Description: Standard PC parallel port
Author: ds
Status: works in immediate mode
Devices: [standard] parallel port (comedi_parport)
Updated: Tue, 30 Apr 2002 21:11:45 -0700

A cheap and easy way to get a few more digital I/O lines.  Steal
additional parallel ports from old computers or your neighbors'
computers.

Option list:
 0: I/O port base for the parallel port.
 1: IRQ

Parallel Port Lines:

pin     subdev  chan    aka
---     ------  ----    ---
1       2       0       strobe
2       0       0       data 0
3       0       1       data 1
4       0       2       data 2
5       0       3       data 3
6       0       4       data 4
7       0       5       data 5
8       0       6       data 6
9       0       7       data 7
10      1       3       acknowledge
11      1       4       busy
12      1       2       output
13      1       1       printer selected
14      2       1       auto LF
15      1       0       error
16      2       2       init
17      2       3       select printer
18-25   ground

Notes:

Subdevices 0 is digital I/O, subdevice 1 is digital input, and
subdevice 2 is digital output.  Unlike other Comedi devices,
subdevice 0 defaults to output.

Pins 13 and 14 are inverted once by Comedi and once by the
hardware, thus cancelling the effect.

Pin 1 is a strobe, thus acts like one.  There's no way in software
to change this, at least on a standard parallel port.

Subdevice 3 pretends to be a digital input subdevice, but it always
returns 0 when read.  However, if you run a command with
scan_begin_src=TRIG_EXT, it uses pin 10 as a external triggering
pin, which can be used to wake up tasks.
*/
/*
   see http://www.beyondlogic.org/ for information.
   or http://www.linux-magazin.de/ausgabe/1999/10/IO/io.html
 */

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

#include "comedi_fc.h"

#define PARPORT_SIZE 3

#define PARPORT_A 0
#define PARPORT_B 1
#define PARPORT_C 2

struct parport_private {
	unsigned int a_data;
	unsigned int c_data;
	int enable_irq;
};

static int parport_insn_a(struct comedi_device *dev, struct comedi_subdevice *s,
			  struct comedi_insn *insn, unsigned int *data)
{
	struct parport_private *devpriv = dev->private;

	if (data[0]) {
		devpriv->a_data &= ~data[0];
		devpriv->a_data |= (data[0] & data[1]);

		outb(devpriv->a_data, dev->iobase + PARPORT_A);
	}

	data[1] = inb(dev->iobase + PARPORT_A);

	return insn->n;
}

static int parport_insn_config_a(struct comedi_device *dev,
				 struct comedi_subdevice *s,
				 struct comedi_insn *insn, unsigned int *data)
{
	struct parport_private *devpriv = dev->private;

	if (data[0]) {
		s->io_bits = 0xff;
		devpriv->c_data &= ~(1 << 5);
	} else {
		s->io_bits = 0;
		devpriv->c_data |= (1 << 5);
	}
	outb(devpriv->c_data, dev->iobase + PARPORT_C);

	return 1;
}

static int parport_insn_b(struct comedi_device *dev, struct comedi_subdevice *s,
			  struct comedi_insn *insn, unsigned int *data)
{
	if (data[0]) {
		/* should writes be ignored? */
		/* anyone??? */
	}

	data[1] = (inb(dev->iobase + PARPORT_B) >> 3);

	return insn->n;
}

static int parport_insn_c(struct comedi_device *dev, struct comedi_subdevice *s,
			  struct comedi_insn *insn, unsigned int *data)
{
	struct parport_private *devpriv = dev->private;

	data[0] &= 0x0f;
	if (data[0]) {
		devpriv->c_data &= ~data[0];
		devpriv->c_data |= (data[0] & data[1]);

		outb(devpriv->c_data, dev->iobase + PARPORT_C);
	}

	data[1] = devpriv->c_data & 0xf;

	return insn->n;
}

static int parport_intr_insn(struct comedi_device *dev,
			     struct comedi_subdevice *s,
			     struct comedi_insn *insn, unsigned int *data)
{
	data[1] = 0;
	return insn->n;
}

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

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

	err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW);
	err |= cfc_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
	err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW);
	err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
	err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_NONE);

	if (err)
		return 1;

	/* Step 2a : make sure trigger sources are unique */
	/* Step 2b : and mutually compatible */

	if (err)
		return 2;

	/* step 3: */

	if (cmd->start_arg != 0) {
		cmd->start_arg = 0;
		err++;
	}
	if (cmd->scan_begin_arg != 0) {
		cmd->scan_begin_arg = 0;
		err++;
	}
	if (cmd->convert_arg != 0) {
		cmd->convert_arg = 0;
		err++;
	}
	if (cmd->scan_end_arg != 1) {
		cmd->scan_end_arg = 1;
		err++;
	}
	if (cmd->stop_arg != 0) {
		cmd->stop_arg = 0;
		err++;
	}

	if (err)
		return 3;

	/* step 4: ignored */

	if (err)
		return 4;

	return 0;
}

static int parport_intr_cmd(struct comedi_device *dev,
			    struct comedi_subdevice *s)
{
	struct parport_private *devpriv = dev->private;

	devpriv->c_data |= 0x10;
	outb(devpriv->c_data, dev->iobase + PARPORT_C);

	devpriv->enable_irq = 1;

	return 0;
}

static int parport_intr_cancel(struct comedi_device *dev,
			       struct comedi_subdevice *s)
{
	struct parport_private *devpriv = dev->private;

	devpriv->c_data &= ~0x10;
	outb(devpriv->c_data, dev->iobase + PARPORT_C);

	devpriv->enable_irq = 0;

	return 0;
}

static irqreturn_t parport_interrupt(int irq, void *d)
{
	struct comedi_device *dev = d;
	struct parport_private *devpriv = dev->private;
	struct comedi_subdevice *s = &dev->subdevices[3];

	if (!devpriv->enable_irq)
		return IRQ_NONE;

	comedi_buf_put(s->async, 0);
	s->async->events |= COMEDI_CB_BLOCK | COMEDI_CB_EOS;

	comedi_event(dev, s);
	return IRQ_HANDLED;
}

static int parport_attach(struct comedi_device *dev,
			  struct comedi_devconfig *it)
{
	struct parport_private *devpriv;
	int ret;
	unsigned int irq;
	unsigned long iobase;
	struct comedi_subdevice *s;

	dev->board_name = dev->driver->driver_name;

	iobase = it->options[0];
	if (!request_region(iobase, PARPORT_SIZE, dev->board_name)) {
		dev_err(dev->class_dev, "I/O port conflict\n");
		return -EIO;
	}
	dev->iobase = iobase;

	irq = it->options[1];
	if (irq) {
		ret = request_irq(irq, parport_interrupt, 0, dev->board_name,
				  dev);
		if (ret < 0) {
			dev_err(dev->class_dev, "irq not available\n");
			return -EINVAL;
		}
		dev->irq = irq;
	}

	ret = comedi_alloc_subdevices(dev, 4);
	if (ret)
		return ret;

	devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
	if (!devpriv)
		return -ENOMEM;
	dev->private = devpriv;

	s = &dev->subdevices[0];
	s->type = COMEDI_SUBD_DIO;
	s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
	s->n_chan = 8;
	s->maxdata = 1;
	s->range_table = &range_digital;
	s->insn_bits = parport_insn_a;
	s->insn_config = parport_insn_config_a;

	s = &dev->subdevices[1];
	s->type = COMEDI_SUBD_DI;
	s->subdev_flags = SDF_READABLE;
	s->n_chan = 5;
	s->maxdata = 1;
	s->range_table = &range_digital;
	s->insn_bits = parport_insn_b;

	s = &dev->subdevices[2];
	s->type = COMEDI_SUBD_DO;
	s->subdev_flags = SDF_WRITABLE;
	s->n_chan = 4;
	s->maxdata = 1;
	s->range_table = &range_digital;
	s->insn_bits = parport_insn_c;

	s = &dev->subdevices[3];
	if (irq) {
		dev->read_subdev = s;
		s->type = COMEDI_SUBD_DI;
		s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
		s->n_chan = 1;
		s->maxdata = 1;
		s->range_table = &range_digital;
		s->insn_bits = parport_intr_insn;
		s->do_cmdtest = parport_intr_cmdtest;
		s->do_cmd = parport_intr_cmd;
		s->cancel = parport_intr_cancel;
	} else {
		s->type = COMEDI_SUBD_UNUSED;
	}

	devpriv->a_data = 0;
	outb(devpriv->a_data, dev->iobase + PARPORT_A);
	devpriv->c_data = 0;
	outb(devpriv->c_data, dev->iobase + PARPORT_C);

	dev_info(dev->class_dev, "%s: iobase=0x%04lx, irq %sabled",
		dev->board_name, dev->iobase, dev->irq ? "en" : "dis");

	return 0;
}

static void parport_detach(struct comedi_device *dev)
{
	if (dev->iobase)
		release_region(dev->iobase, PARPORT_SIZE);
	if (dev->irq)
		free_irq(dev->irq, dev);
}

static struct comedi_driver parport_driver = {
	.driver_name	= "comedi_parport",
	.module		= THIS_MODULE,
	.attach		= parport_attach,
	.detach		= parport_detach,
};
module_comedi_driver(parport_driver);

MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
241ab6ad DS	1	/*
	2	comedi/drivers/comedi_parport.c
	3	hardware driver for standard parallel port
	4
	5	COMEDI - Linux Control and Measurement Device Interface
	6	Copyright (C) 1998,2001 David A. Schleef <ds@schleef.org>
	7
	8	This program is free software; you can redistribute it and/or modify
	9	it under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 2 of the License, or
	11	(at your option) any later version.
	12
	13	This program is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
	19	along with this program; if not, write to the Free Software
	20	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	21
	22	*/
	23	/*
	24	Driver: comedi_parport
	25	Description: Standard PC parallel port
	26	Author: ds
	27	Status: works in immediate mode
	28	Devices: [standard] parallel port (comedi_parport)
	29	Updated: Tue, 30 Apr 2002 21:11:45 -0700
	30
	31	A cheap and easy way to get a few more digital I/O lines. Steal
	32	additional parallel ports from old computers or your neighbors'
	33	computers.
	34
	35	Option list:
	36	0: I/O port base for the parallel port.
	37	1: IRQ
	38
	39	Parallel Port Lines:
	40
	41	pin subdev chan aka
	42	--- ------ ---- ---
	43	1 2 0 strobe
	44	2 0 0 data 0
	45	3 0 1 data 1
	46	4 0 2 data 2
	47	5 0 3 data 3
	48	6 0 4 data 4
	49	7 0 5 data 5
	50	8 0 6 data 6
	51	9 0 7 data 7
	52	10 1 3 acknowledge
	53	11 1 4 busy
	54	12 1 2 output
	55	13 1 1 printer selected
	56	14 2 1 auto LF
	57	15 1 0 error
	58	16 2 2 init
	59	17 2 3 select printer
	60	18-25 ground
	61
	62	Notes:
	63
	64	Subdevices 0 is digital I/O, subdevice 1 is digital input, and
65	subdevice 2 is digital output. Unlike other Comedi devices,
66	subdevice 0 defaults to output.
67
68	Pins 13 and 14 are inverted once by Comedi and once by the
69	hardware, thus cancelling the effect.
70
71	Pin 1 is a strobe, thus acts like one. There's no way in software
72	to change this, at least on a standard parallel port.
73
74	Subdevice 3 pretends to be a digital input subdevice, but it always
75	returns 0 when read. However, if you run a command with
76	scan_begin_src=TRIG_EXT, it uses pin 10 as a external triggering
77	pin, which can be used to wake up tasks.
78	*/
79	/*
80	see http://www.beyondlogic.org/ for information.
81	or http://www.linux-magazin.de/ausgabe/1999/10/IO/io.html
82	*/
83
84	#include "../comedidev.h"
70265d24	85	#include <linux/interrupt.h>
241ab6ad DS	86	#include <linux/ioport.h>
241ab6ad DS	87
27020ffe HS	88	#include "comedi_fc.h"
27020ffe HS	89
241ab6ad DS	90	#define PARPORT_SIZE 3
	91
	92	#define PARPORT_A 0
	93	#define PARPORT_B 1
	94	#define PARPORT_C 2
	95
652dd4e7	96	struct parport_private {
241ab6ad DS	97	unsigned int a_data;
	98	unsigned int c_data;
	99	int enable_irq;
652dd4e7	100	};
241ab6ad	101
34c43922	102	static int parport_insn_a(struct comedi_device dev, struct comedi_subdevice s,
90035c08	103	struct comedi_insn insn, unsigned int data)
241ab6ad	104	{
d3bcf099 HS	105	struct parport_private *devpriv = dev->private;
d3bcf099 HS	106
241ab6ad DS	107	if (data[0]) {
	108	devpriv->a_data &= ~data[0];
	109	devpriv->a_data \|= (data[0] & data[1]);
	110
	111	outb(devpriv->a_data, dev->iobase + PARPORT_A);
	112	}
	113
	114	data[1] = inb(dev->iobase + PARPORT_A);
	115
a2714e3e	116	return insn->n;
241ab6ad DS	117	}
241ab6ad DS	118
0a85b6f0 MT	119	static int parport_insn_config_a(struct comedi_device *dev,
0a85b6f0 MT	120	struct comedi_subdevice *s,
90035c08	121	struct comedi_insn insn, unsigned int data)
241ab6ad	122	{
d3bcf099 HS	123	struct parport_private *devpriv = dev->private;
d3bcf099 HS	124
241ab6ad DS	125	if (data[0]) {
	126	s->io_bits = 0xff;
	127	devpriv->c_data &= ~(1 << 5);
	128	} else {
	129	s->io_bits = 0;
	130	devpriv->c_data \|= (1 << 5);
	131	}
	132	outb(devpriv->c_data, dev->iobase + PARPORT_C);
	133
	134	return 1;
	135	}
	136
34c43922	137	static int parport_insn_b(struct comedi_device dev, struct comedi_subdevice s,
90035c08	138	struct comedi_insn insn, unsigned int data)
241ab6ad DS	139	{
241ab6ad DS	140	if (data[0]) {
652dd4e7 GKH	141	/* should writes be ignored? */
652dd4e7 GKH	142	/* anyone??? */
241ab6ad DS	143	}
	144
	145	data[1] = (inb(dev->iobase + PARPORT_B) >> 3);
	146
a2714e3e	147	return insn->n;
241ab6ad DS	148	}
241ab6ad DS	149
34c43922	150	static int parport_insn_c(struct comedi_device dev, struct comedi_subdevice s,
90035c08	151	struct comedi_insn insn, unsigned int data)
241ab6ad	152	{
d3bcf099 HS	153	struct parport_private *devpriv = dev->private;
d3bcf099 HS	154
241ab6ad DS	155	data[0] &= 0x0f;
	156	if (data[0]) {
	157	devpriv->c_data &= ~data[0];
	158	devpriv->c_data \|= (data[0] & data[1]);
	159
	160	outb(devpriv->c_data, dev->iobase + PARPORT_C);
	161	}
	162
	163	data[1] = devpriv->c_data & 0xf;
	164
a2714e3e	165	return insn->n;
241ab6ad DS	166	}
241ab6ad DS	167
0a85b6f0 MT	168	static int parport_intr_insn(struct comedi_device *dev,
0a85b6f0 MT	169	struct comedi_subdevice *s,
90035c08	170	struct comedi_insn insn, unsigned int data)
241ab6ad	171	{
241ab6ad	172	data[1] = 0;
a2714e3e	173	return insn->n;
241ab6ad DS	174	}
241ab6ad DS	175
0a85b6f0 MT	176	static int parport_intr_cmdtest(struct comedi_device *dev,
0a85b6f0 MT	177	struct comedi_subdevice *s,
ea6d0d4c	178	struct comedi_cmd *cmd)
241ab6ad DS	179	{
241ab6ad DS	180	int err = 0;
241ab6ad	181
27020ffe	182	/* Step 1 : check if triggers are trivially valid */
241ab6ad	183
27020ffe HS	184	err \|= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW);
	185	err \|= cfc_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
	186	err \|= cfc_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW);
	187	err \|= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
	188	err \|= cfc_check_trigger_src(&cmd->stop_src, TRIG_NONE);
241ab6ad DS	189
	190	if (err)
	191	return 1;
	192
27020ffe HS	193	/* Step 2a : make sure trigger sources are unique */
27020ffe HS	194	/* Step 2b : and mutually compatible */
241ab6ad DS	195
	196	if (err)
	197	return 2;
	198
	199	/* step 3: */
	200
	201	if (cmd->start_arg != 0) {
	202	cmd->start_arg = 0;
	203	err++;
	204	}
	205	if (cmd->scan_begin_arg != 0) {
	206	cmd->scan_begin_arg = 0;
	207	err++;
	208	}
	209	if (cmd->convert_arg != 0) {
	210	cmd->convert_arg = 0;
	211	err++;
	212	}
	213	if (cmd->scan_end_arg != 1) {
	214	cmd->scan_end_arg = 1;
	215	err++;
	216	}
	217	if (cmd->stop_arg != 0) {
	218	cmd->stop_arg = 0;
	219	err++;
	220	}
	221
	222	if (err)
	223	return 3;
	224
	225	/* step 4: ignored */
	226
	227	if (err)
	228	return 4;
	229
	230	return 0;
	231	}
	232
0a85b6f0 MT	233	static int parport_intr_cmd(struct comedi_device *dev,
0a85b6f0 MT	234	struct comedi_subdevice *s)
241ab6ad	235	{
d3bcf099 HS	236	struct parport_private *devpriv = dev->private;
d3bcf099 HS	237
241ab6ad DS	238	devpriv->c_data \|= 0x10;
	239	outb(devpriv->c_data, dev->iobase + PARPORT_C);
	240
	241	devpriv->enable_irq = 1;
	242
	243	return 0;
	244	}
	245
0a85b6f0 MT	246	static int parport_intr_cancel(struct comedi_device *dev,
0a85b6f0 MT	247	struct comedi_subdevice *s)
241ab6ad	248	{
d3bcf099 HS	249	struct parport_private *devpriv = dev->private;
d3bcf099 HS	250
241ab6ad DS	251	devpriv->c_data &= ~0x10;
	252	outb(devpriv->c_data, dev->iobase + PARPORT_C);
	253
	254	devpriv->enable_irq = 0;
	255
	256	return 0;
	257	}
	258
70265d24	259	static irqreturn_t parport_interrupt(int irq, void *d)
241ab6ad	260	{
71b5f4f1	261	struct comedi_device *dev = d;
d3bcf099	262	struct parport_private *devpriv = dev->private;
9da5ae29	263	struct comedi_subdevice *s = &dev->subdevices[3];
241ab6ad	264
06331fb0	265	if (!devpriv->enable_irq)
241ab6ad	266	return IRQ_NONE;
241ab6ad DS	267
	268	comedi_buf_put(s->async, 0);
	269	s->async->events \|= COMEDI_CB_BLOCK \| COMEDI_CB_EOS;
	270
	271	comedi_event(dev, s);
	272	return IRQ_HANDLED;
	273	}
	274
0a85b6f0 MT	275	static int parport_attach(struct comedi_device *dev,
0a85b6f0 MT	276	struct comedi_devconfig *it)
241ab6ad	277	{
d3bcf099	278	struct parport_private *devpriv;
241ab6ad DS	279	int ret;
	280	unsigned int irq;
	281	unsigned long iobase;
34c43922	282	struct comedi_subdevice *s;
241ab6ad	283
45d63700 HS	284	dev->board_name = dev->driver->driver_name;
45d63700 HS	285
241ab6ad	286	iobase = it->options[0];
45d63700	287	if (!request_region(iobase, PARPORT_SIZE, dev->board_name)) {
b8d0f3ae	288	dev_err(dev->class_dev, "I/O port conflict\n");
241ab6ad DS	289	return -EIO;
	290	}
	291	dev->iobase = iobase;
	292
	293	irq = it->options[1];
	294	if (irq) {
45d63700	295	ret = request_irq(irq, parport_interrupt, 0, dev->board_name,
5f74ea14	296	dev);
241ab6ad	297	if (ret < 0) {
b8d0f3ae	298	dev_err(dev->class_dev, "irq not available\n");
241ab6ad DS	299	return -EINVAL;
	300	}
	301	dev->irq = irq;
	302	}
241ab6ad	303
2f0b9d08	304	ret = comedi_alloc_subdevices(dev, 4);
8b6c5694	305	if (ret)
241ab6ad	306	return ret;
8b6c5694	307
c34fa261 HS	308	devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
	309	if (!devpriv)
	310	return -ENOMEM;
	311	dev->private = devpriv;
241ab6ad	312
9da5ae29	313	s = &dev->subdevices[0];
241ab6ad DS	314	s->type = COMEDI_SUBD_DIO;
	315	s->subdev_flags = SDF_READABLE \| SDF_WRITABLE;
	316	s->n_chan = 8;
	317	s->maxdata = 1;
	318	s->range_table = &range_digital;
	319	s->insn_bits = parport_insn_a;
	320	s->insn_config = parport_insn_config_a;
	321
9da5ae29	322	s = &dev->subdevices[1];
241ab6ad DS	323	s->type = COMEDI_SUBD_DI;
	324	s->subdev_flags = SDF_READABLE;
	325	s->n_chan = 5;
	326	s->maxdata = 1;
	327	s->range_table = &range_digital;
	328	s->insn_bits = parport_insn_b;
	329
9da5ae29	330	s = &dev->subdevices[2];
241ab6ad DS	331	s->type = COMEDI_SUBD_DO;
	332	s->subdev_flags = SDF_WRITABLE;
	333	s->n_chan = 4;
	334	s->maxdata = 1;
	335	s->range_table = &range_digital;
	336	s->insn_bits = parport_insn_c;
	337
9da5ae29	338	s = &dev->subdevices[3];
241ab6ad DS	339	if (irq) {
	340	dev->read_subdev = s;
	341	s->type = COMEDI_SUBD_DI;
	342	s->subdev_flags = SDF_READABLE \| SDF_CMD_READ;
	343	s->n_chan = 1;
	344	s->maxdata = 1;
	345	s->range_table = &range_digital;
	346	s->insn_bits = parport_intr_insn;
	347	s->do_cmdtest = parport_intr_cmdtest;
	348	s->do_cmd = parport_intr_cmd;
	349	s->cancel = parport_intr_cancel;
	350	} else {
	351	s->type = COMEDI_SUBD_UNUSED;
	352	}
	353
	354	devpriv->a_data = 0;
	355	outb(devpriv->a_data, dev->iobase + PARPORT_A);
	356	devpriv->c_data = 0;
	357	outb(devpriv->c_data, dev->iobase + PARPORT_C);
	358
b8d0f3ae HS	359	dev_info(dev->class_dev, "%s: iobase=0x%04lx, irq %sabled",
	360	dev->board_name, dev->iobase, dev->irq ? "en" : "dis");
	361
	362	return 0;
241ab6ad DS	363	}
241ab6ad DS	364
484ecc95	365	static void parport_detach(struct comedi_device *dev)
241ab6ad	366	{
241ab6ad DS	367	if (dev->iobase)
241ab6ad DS	368	release_region(dev->iobase, PARPORT_SIZE);
241ab6ad	369	if (dev->irq)
5f74ea14	370	free_irq(dev->irq, dev);
241ab6ad	371	}
90f703d3	372
bfba5e78 HS	373	static struct comedi_driver parport_driver = {
	374	.driver_name = "comedi_parport",
	375	.module = THIS_MODULE,
	376	.attach = parport_attach,
	377	.detach = parport_detach,
	378	};
	379	module_comedi_driver(parport_driver);
	380
90f703d3 AT	381	MODULE_AUTHOR("Comedi http://www.comedi.org");
	382	MODULE_DESCRIPTION("Comedi low-level driver");
	383	MODULE_LICENSE("GPL");