[GitHub/mt8127/android_kernel_alcatel_ttab.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>

#define PARPORT_SIZE 3

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

static int parport_attach(struct comedi_device *dev,
			  struct comedi_devconfig *it);
static int parport_detach(struct comedi_device *dev);
static struct comedi_driver driver_parport = {
	.driver_name = "comedi_parport",
	.module = THIS_MODULE,
	.attach = parport_attach,
	.detach = parport_detach,
};

static int __init driver_parport_init_module(void)
{
	return comedi_driver_register(&driver_parport);
}

static void __exit driver_parport_cleanup_module(void)
{
	comedi_driver_unregister(&driver_parport);
}

module_init(driver_parport_init_module);
module_exit(driver_parport_cleanup_module);

struct parport_private {
	unsigned int a_data;
	unsigned int c_data;
	int enable_irq;
};
#define devpriv ((struct parport_private *)(dev->private))

static int parport_insn_a(struct comedi_device *dev, struct comedi_subdevice *s,
			  struct comedi_insn *insn, unsigned int *data)
{
	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 2;
}

static int parport_insn_config_a(struct comedi_device *dev,
				 struct comedi_subdevice *s,
				 struct comedi_insn *insn, unsigned int *data)
{
	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 2;
}

static int parport_insn_c(struct comedi_device *dev, struct comedi_subdevice *s,
			  struct comedi_insn *insn, unsigned int *data)
{
	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 2;
}

static int parport_intr_insn(struct comedi_device *dev,
			     struct comedi_subdevice *s,
			     struct comedi_insn *insn, unsigned int *data)
{
	if (insn->n < 1)
		return -EINVAL;

	data[1] = 0;
	return 2;
}

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

	/* step 1 */

	tmp = cmd->start_src;
	cmd->start_src &= TRIG_NOW;
	if (!cmd->start_src || tmp != cmd->start_src)
		err++;

	tmp = cmd->scan_begin_src;
	cmd->scan_begin_src &= TRIG_EXT;
	if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
		err++;

	tmp = cmd->convert_src;
	cmd->convert_src &= TRIG_FOLLOW;
	if (!cmd->convert_src || tmp != cmd->convert_src)
		err++;

	tmp = cmd->scan_end_src;
	cmd->scan_end_src &= TRIG_COUNT;
	if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
		err++;

	tmp = cmd->stop_src;
	cmd->stop_src &= TRIG_NONE;
	if (!cmd->stop_src || tmp != cmd->stop_src)
		err++;

	if (err)
		return 1;

	/* step 2: ignored */

	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)
{
	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)
{
	printk(KERN_DEBUG "parport_intr_cancel()\n");

	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 comedi_subdevice *s = dev->subdevices + 3;

	if (!devpriv->enable_irq) {
		printk(KERN_ERR "comedi_parport: bogus irq, ignored\n");
		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)
{
	int ret;
	unsigned int irq;
	unsigned long iobase;
	struct comedi_subdevice *s;

	iobase = it->options[0];
	printk(KERN_INFO "comedi%d: parport: 0x%04lx ", dev->minor, iobase);
	if (!request_region(iobase, PARPORT_SIZE, "parport (comedi)")) {
		printk(KERN_ERR "I/O port conflict\n");
		return -EIO;
	}
	dev->iobase = iobase;

	irq = it->options[1];
	if (irq) {
		printk(KERN_INFO " irq=%u", irq);
		ret = request_irq(irq, parport_interrupt, 0, "comedi_parport",
				  dev);
		if (ret < 0) {
			printk(KERN_ERR " irq not available\n");
			return -EINVAL;
		}
		dev->irq = irq;
	}
	dev->board_name = "parport";

	ret = alloc_subdevices(dev, 4);
	if (ret < 0)
		return ret;
	ret = alloc_private(dev, sizeof(struct parport_private));
	if (ret < 0)
		return ret;

	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);

	printk(KERN_INFO "\n");
	return 1;
}

static int parport_detach(struct comedi_device *dev)
{
	printk(KERN_INFO "comedi%d: parport: remove\n", dev->minor);

	if (dev->iobase)
		release_region(dev->iobase, PARPORT_SIZE);

	if (dev->irq)
		free_irq(dev->irq, dev);

	return 0;
}

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>
	87
	88	#define PARPORT_SIZE 3
	89
	90	#define PARPORT_A 0
	91	#define PARPORT_B 1
	92	#define PARPORT_C 2
	93
0a85b6f0 MT	94	static int parport_attach(struct comedi_device *dev,
0a85b6f0 MT	95	struct comedi_devconfig *it);
71b5f4f1	96	static int parport_detach(struct comedi_device *dev);
139dfbdf	97	static struct comedi_driver driver_parport = {
0a85b6f0 MT	98	.driver_name = "comedi_parport",
	99	.module = THIS_MODULE,
	100	.attach = parport_attach,
	101	.detach = parport_detach,
241ab6ad DS	102	};
241ab6ad DS	103
7114a280 AT	104	static int __init driver_parport_init_module(void)
	105	{
	106	return comedi_driver_register(&driver_parport);
	107	}
	108
	109	static void __exit driver_parport_cleanup_module(void)
	110	{
	111	comedi_driver_unregister(&driver_parport);
	112	}
	113
	114	module_init(driver_parport_init_module);
	115	module_exit(driver_parport_cleanup_module);
241ab6ad	116
652dd4e7	117	struct parport_private {
241ab6ad DS	118	unsigned int a_data;
	119	unsigned int c_data;
	120	int enable_irq;
652dd4e7 GKH	121	};
652dd4e7 GKH	122	#define devpriv ((struct parport_private *)(dev->private))
241ab6ad	123
34c43922	124	static int parport_insn_a(struct comedi_device dev, struct comedi_subdevice s,
90035c08	125	struct comedi_insn insn, unsigned int data)
241ab6ad DS	126	{
	127	if (data[0]) {
	128	devpriv->a_data &= ~data[0];
	129	devpriv->a_data \|= (data[0] & data[1]);
	130
	131	outb(devpriv->a_data, dev->iobase + PARPORT_A);
	132	}
	133
	134	data[1] = inb(dev->iobase + PARPORT_A);
	135
	136	return 2;
	137	}
	138
0a85b6f0 MT	139	static int parport_insn_config_a(struct comedi_device *dev,
0a85b6f0 MT	140	struct comedi_subdevice *s,
90035c08	141	struct comedi_insn insn, unsigned int data)
241ab6ad DS	142	{
	143	if (data[0]) {
	144	s->io_bits = 0xff;
	145	devpriv->c_data &= ~(1 << 5);
	146	} else {
	147	s->io_bits = 0;
	148	devpriv->c_data \|= (1 << 5);
	149	}
	150	outb(devpriv->c_data, dev->iobase + PARPORT_C);
	151
	152	return 1;
	153	}
	154
34c43922	155	static int parport_insn_b(struct comedi_device dev, struct comedi_subdevice s,
90035c08	156	struct comedi_insn insn, unsigned int data)
241ab6ad DS	157	{
241ab6ad DS	158	if (data[0]) {
652dd4e7 GKH	159	/* should writes be ignored? */
652dd4e7 GKH	160	/* anyone??? */
241ab6ad DS	161	}
	162
	163	data[1] = (inb(dev->iobase + PARPORT_B) >> 3);
	164
	165	return 2;
	166	}
	167
34c43922	168	static int parport_insn_c(struct comedi_device dev, struct comedi_subdevice s,
90035c08	169	struct comedi_insn insn, unsigned int data)
241ab6ad DS	170	{
	171	data[0] &= 0x0f;
	172	if (data[0]) {
	173	devpriv->c_data &= ~data[0];
	174	devpriv->c_data \|= (data[0] & data[1]);
	175
	176	outb(devpriv->c_data, dev->iobase + PARPORT_C);
	177	}
	178
	179	data[1] = devpriv->c_data & 0xf;
	180
	181	return 2;
	182	}
	183
0a85b6f0 MT	184	static int parport_intr_insn(struct comedi_device *dev,
0a85b6f0 MT	185	struct comedi_subdevice *s,
90035c08	186	struct comedi_insn insn, unsigned int data)
241ab6ad DS	187	{
	188	if (insn->n < 1)
	189	return -EINVAL;
	190
	191	data[1] = 0;
	192	return 2;
	193	}
	194
0a85b6f0 MT	195	static int parport_intr_cmdtest(struct comedi_device *dev,
0a85b6f0 MT	196	struct comedi_subdevice *s,
ea6d0d4c	197	struct comedi_cmd *cmd)
241ab6ad DS	198	{
	199	int err = 0;
	200	int tmp;
	201
	202	/* step 1 */
	203
	204	tmp = cmd->start_src;
	205	cmd->start_src &= TRIG_NOW;
	206	if (!cmd->start_src \|\| tmp != cmd->start_src)
	207	err++;
	208
	209	tmp = cmd->scan_begin_src;
	210	cmd->scan_begin_src &= TRIG_EXT;
	211	if (!cmd->scan_begin_src \|\| tmp != cmd->scan_begin_src)
	212	err++;
	213
	214	tmp = cmd->convert_src;
	215	cmd->convert_src &= TRIG_FOLLOW;
	216	if (!cmd->convert_src \|\| tmp != cmd->convert_src)
	217	err++;
	218
	219	tmp = cmd->scan_end_src;
	220	cmd->scan_end_src &= TRIG_COUNT;
	221	if (!cmd->scan_end_src \|\| tmp != cmd->scan_end_src)
	222	err++;
	223
	224	tmp = cmd->stop_src;
	225	cmd->stop_src &= TRIG_NONE;
	226	if (!cmd->stop_src \|\| tmp != cmd->stop_src)
	227	err++;
	228
	229	if (err)
	230	return 1;
	231
	232	/* step 2: ignored */
	233
	234	if (err)
	235	return 2;
	236
	237	/* step 3: */
	238
	239	if (cmd->start_arg != 0) {
	240	cmd->start_arg = 0;
	241	err++;
	242	}
	243	if (cmd->scan_begin_arg != 0) {
	244	cmd->scan_begin_arg = 0;
	245	err++;
	246	}
	247	if (cmd->convert_arg != 0) {
	248	cmd->convert_arg = 0;
	249	err++;
	250	}
	251	if (cmd->scan_end_arg != 1) {
	252	cmd->scan_end_arg = 1;
	253	err++;
	254	}
	255	if (cmd->stop_arg != 0) {
	256	cmd->stop_arg = 0;
	257	err++;
	258	}
	259
	260	if (err)
	261	return 3;
262
263	/* step 4: ignored */
264
265	if (err)
266	return 4;
267
268	return 0;
269	}
270
0a85b6f0 MT	271	static int parport_intr_cmd(struct comedi_device *dev,
0a85b6f0 MT	272	struct comedi_subdevice *s)
241ab6ad DS	273	{
	274	devpriv->c_data \|= 0x10;
	275	outb(devpriv->c_data, dev->iobase + PARPORT_C);
	276
	277	devpriv->enable_irq = 1;
	278
	279	return 0;
	280	}
	281
0a85b6f0 MT	282	static int parport_intr_cancel(struct comedi_device *dev,
0a85b6f0 MT	283	struct comedi_subdevice *s)
241ab6ad	284	{
652dd4e7	285	printk(KERN_DEBUG "parport_intr_cancel()\n");
241ab6ad DS	286
	287	devpriv->c_data &= ~0x10;
	288	outb(devpriv->c_data, dev->iobase + PARPORT_C);
	289
	290	devpriv->enable_irq = 0;
	291
	292	return 0;
	293	}
	294
70265d24	295	static irqreturn_t parport_interrupt(int irq, void *d)
241ab6ad	296	{
71b5f4f1	297	struct comedi_device *dev = d;
34c43922	298	struct comedi_subdevice *s = dev->subdevices + 3;
241ab6ad DS	299
241ab6ad DS	300	if (!devpriv->enable_irq) {
652dd4e7	301	printk(KERN_ERR "comedi_parport: bogus irq, ignored\n");
241ab6ad DS	302	return IRQ_NONE;
	303	}
	304
	305	comedi_buf_put(s->async, 0);
	306	s->async->events \|= COMEDI_CB_BLOCK \| COMEDI_CB_EOS;
	307
	308	comedi_event(dev, s);
	309	return IRQ_HANDLED;
	310	}
	311
0a85b6f0 MT	312	static int parport_attach(struct comedi_device *dev,
0a85b6f0 MT	313	struct comedi_devconfig *it)
241ab6ad DS	314	{
	315	int ret;
	316	unsigned int irq;
	317	unsigned long iobase;
34c43922	318	struct comedi_subdevice *s;
241ab6ad DS	319
241ab6ad DS	320	iobase = it->options[0];
652dd4e7	321	printk(KERN_INFO "comedi%d: parport: 0x%04lx ", dev->minor, iobase);
241ab6ad	322	if (!request_region(iobase, PARPORT_SIZE, "parport (comedi)")) {
8487d0e9	323	printk(KERN_ERR "I/O port conflict\n");
241ab6ad DS	324	return -EIO;
	325	}
	326	dev->iobase = iobase;
	327
	328	irq = it->options[1];
	329	if (irq) {
8487d0e9	330	printk(KERN_INFO " irq=%u", irq);
5f74ea14 GKH	331	ret = request_irq(irq, parport_interrupt, 0, "comedi_parport",
5f74ea14 GKH	332	dev);
241ab6ad	333	if (ret < 0) {
8487d0e9	334	printk(KERN_ERR " irq not available\n");
241ab6ad DS	335	return -EINVAL;
	336	}
	337	dev->irq = irq;
	338	}
	339	dev->board_name = "parport";
	340
652dd4e7 GKH	341	ret = alloc_subdevices(dev, 4);
652dd4e7 GKH	342	if (ret < 0)
241ab6ad	343	return ret;
652dd4e7 GKH	344	ret = alloc_private(dev, sizeof(struct parport_private));
652dd4e7 GKH	345	if (ret < 0)
241ab6ad DS	346	return ret;
	347
	348	s = dev->subdevices + 0;
	349	s->type = COMEDI_SUBD_DIO;
	350	s->subdev_flags = SDF_READABLE \| SDF_WRITABLE;
	351	s->n_chan = 8;
	352	s->maxdata = 1;
	353	s->range_table = &range_digital;
	354	s->insn_bits = parport_insn_a;
	355	s->insn_config = parport_insn_config_a;
	356
	357	s = dev->subdevices + 1;
	358	s->type = COMEDI_SUBD_DI;
	359	s->subdev_flags = SDF_READABLE;
	360	s->n_chan = 5;
	361	s->maxdata = 1;
	362	s->range_table = &range_digital;
	363	s->insn_bits = parport_insn_b;
	364
	365	s = dev->subdevices + 2;
	366	s->type = COMEDI_SUBD_DO;
	367	s->subdev_flags = SDF_WRITABLE;
	368	s->n_chan = 4;
	369	s->maxdata = 1;
	370	s->range_table = &range_digital;
	371	s->insn_bits = parport_insn_c;
	372
	373	s = dev->subdevices + 3;
	374	if (irq) {
	375	dev->read_subdev = s;
	376	s->type = COMEDI_SUBD_DI;
	377	s->subdev_flags = SDF_READABLE \| SDF_CMD_READ;
	378	s->n_chan = 1;
	379	s->maxdata = 1;
	380	s->range_table = &range_digital;
	381	s->insn_bits = parport_intr_insn;
	382	s->do_cmdtest = parport_intr_cmdtest;
	383	s->do_cmd = parport_intr_cmd;
	384	s->cancel = parport_intr_cancel;
	385	} else {
	386	s->type = COMEDI_SUBD_UNUSED;
	387	}
	388
	389	devpriv->a_data = 0;
	390	outb(devpriv->a_data, dev->iobase + PARPORT_A);
	391	devpriv->c_data = 0;
	392	outb(devpriv->c_data, dev->iobase + PARPORT_C);
	393
8487d0e9	394	printk(KERN_INFO "\n");
241ab6ad DS	395	return 1;
	396	}
	397
71b5f4f1	398	static int parport_detach(struct comedi_device *dev)
241ab6ad	399	{
8487d0e9	400	printk(KERN_INFO "comedi%d: parport: remove\n", dev->minor);
241ab6ad DS	401
	402	if (dev->iobase)
	403	release_region(dev->iobase, PARPORT_SIZE);
	404
	405	if (dev->irq)
5f74ea14	406	free_irq(dev->irq, dev);
241ab6ad DS	407
	408	return 0;
	409	}
90f703d3 AT	410
	411	MODULE_AUTHOR("Comedi http://www.comedi.org");
	412	MODULE_DESCRIPTION("Comedi low-level driver");
	413	MODULE_LICENSE("GPL");