[deliverable/linux.git] / drivers / staging / comedi / drivers / dt2817.c

/*
    comedi/drivers/dt2817.c
    Hardware driver for Data Translation DT2817

    COMEDI - Linux Control and Measurement Device Interface
    Copyright (C) 1998 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: dt2817
Description: Data Translation DT2817
Author: ds
Status: complete
Devices: [Data Translation] DT2817 (dt2817)

A very simple digital I/O card.  Four banks of 8 lines, each bank
is configurable for input or output.  One wonders why it takes a
50 page manual to describe this thing.

The driver (which, btw, is much less than 50 pages) has 1 subdevice
with 32 channels, configurable in groups of 8.

Configuration options:
  [0] - I/O port base base address
*/

#include "../comedidev.h"

#include <linux/ioport.h>

#define DT2817_SIZE 5

#define DT2817_CR 0
#define DT2817_DATA 1

static int dt2817_dio_insn_config(struct comedi_device *dev,
				  struct comedi_subdevice *s,
				  struct comedi_insn *insn, unsigned int *data)
{
	int mask;
	int chan;
	int oe = 0;

	if (insn->n != 1)
		return -EINVAL;

	chan = CR_CHAN(insn->chanspec);
	if (chan < 8)
		mask = 0xff;
	else if (chan < 16)
		mask = 0xff00;
	else if (chan < 24)
		mask = 0xff0000;
	else
		mask = 0xff000000;
	if (data[0])
		s->io_bits |= mask;
	else
		s->io_bits &= ~mask;

	if (s->io_bits & 0x000000ff)
		oe |= 0x1;
	if (s->io_bits & 0x0000ff00)
		oe |= 0x2;
	if (s->io_bits & 0x00ff0000)
		oe |= 0x4;
	if (s->io_bits & 0xff000000)
		oe |= 0x8;

	outb(oe, dev->iobase + DT2817_CR);

	return 1;
}

static int dt2817_dio_insn_bits(struct comedi_device *dev,
				struct comedi_subdevice *s,
				struct comedi_insn *insn, unsigned int *data)
{
	unsigned int changed;

	/* It's questionable whether it is more important in
	 * a driver like this to be deterministic or fast.
	 * We choose fast. */

	if (data[0]) {
		changed = s->state;
		s->state &= ~data[0];
		s->state |= (data[0] & data[1]);
		changed ^= s->state;
		changed &= s->io_bits;
		if (changed & 0x000000ff)
			outb(s->state & 0xff, dev->iobase + DT2817_DATA + 0);
		if (changed & 0x0000ff00)
			outb((s->state >> 8) & 0xff,
			     dev->iobase + DT2817_DATA + 1);
		if (changed & 0x00ff0000)
			outb((s->state >> 16) & 0xff,
			     dev->iobase + DT2817_DATA + 2);
		if (changed & 0xff000000)
			outb((s->state >> 24) & 0xff,
			     dev->iobase + DT2817_DATA + 3);
	}
	data[1] = inb(dev->iobase + DT2817_DATA + 0);
	data[1] |= (inb(dev->iobase + DT2817_DATA + 1) << 8);
	data[1] |= (inb(dev->iobase + DT2817_DATA + 2) << 16);
	data[1] |= (inb(dev->iobase + DT2817_DATA + 3) << 24);

	return insn->n;
}

static int dt2817_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
	int ret;
	struct comedi_subdevice *s;
	unsigned long iobase;

	iobase = it->options[0];
	printk(KERN_INFO "comedi%d: dt2817: 0x%04lx ", dev->minor, iobase);
	if (!request_region(iobase, DT2817_SIZE, "dt2817")) {
		printk("I/O port conflict\n");
		return -EIO;
	}
	dev->iobase = iobase;
	dev->board_name = "dt2817";

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

	s = &dev->subdevices[0];

	s->n_chan = 32;
	s->type = COMEDI_SUBD_DIO;
	s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
	s->range_table = &range_digital;
	s->maxdata = 1;
	s->insn_bits = dt2817_dio_insn_bits;
	s->insn_config = dt2817_dio_insn_config;

	s->state = 0;
	outb(0, dev->iobase + DT2817_CR);

	printk(KERN_INFO "\n");

	return 0;
}

static void dt2817_detach(struct comedi_device *dev)
{
	if (dev->iobase)
		release_region(dev->iobase, DT2817_SIZE);
}

static struct comedi_driver dt2817_driver = {
	.driver_name	= "dt2817",
	.module		= THIS_MODULE,
	.attach		= dt2817_attach,
	.detach		= dt2817_detach,
};
module_comedi_driver(dt2817_driver);

MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
0e221af2 DS	1	/*
	2	comedi/drivers/dt2817.c
	3	Hardware driver for Data Translation DT2817
	4
	5	COMEDI - Linux Control and Measurement Device Interface
	6	Copyright (C) 1998 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: dt2817
	25	Description: Data Translation DT2817
	26	Author: ds
	27	Status: complete
	28	Devices: [Data Translation] DT2817 (dt2817)
	29
	30	A very simple digital I/O card. Four banks of 8 lines, each bank
	31	is configurable for input or output. One wonders why it takes a
	32	50 page manual to describe this thing.
	33
	34	The driver (which, btw, is much less than 50 pages) has 1 subdevice
	35	with 32 channels, configurable in groups of 8.
	36
	37	Configuration options:
	38	[0] - I/O port base base address
	39	*/
	40
	41	#include "../comedidev.h"
	42
	43	#include <linux/ioport.h>
	44
	45	#define DT2817_SIZE 5
	46
	47	#define DT2817_CR 0
	48	#define DT2817_DATA 1
	49
0a85b6f0 MT	50	static int dt2817_dio_insn_config(struct comedi_device *dev,
	51	struct comedi_subdevice *s,
	52	struct comedi_insn insn, unsigned int data)
0e221af2 DS	53	{
	54	int mask;
	55	int chan;
	56	int oe = 0;
	57
	58	if (insn->n != 1)
	59	return -EINVAL;
	60
	61	chan = CR_CHAN(insn->chanspec);
8cbf7a9e	62	if (chan < 8)
0e221af2	63	mask = 0xff;
8cbf7a9e	64	else if (chan < 16)
0e221af2	65	mask = 0xff00;
8cbf7a9e	66	else if (chan < 24)
0e221af2	67	mask = 0xff0000;
8cbf7a9e	68	else
0e221af2 DS	69	mask = 0xff000000;
	70	if (data[0])
	71	s->io_bits \|= mask;
	72	else
	73	s->io_bits &= ~mask;
	74
	75	if (s->io_bits & 0x000000ff)
	76	oe \|= 0x1;
	77	if (s->io_bits & 0x0000ff00)
	78	oe \|= 0x2;
	79	if (s->io_bits & 0x00ff0000)
	80	oe \|= 0x4;
	81	if (s->io_bits & 0xff000000)
	82	oe \|= 0x8;
	83
	84	outb(oe, dev->iobase + DT2817_CR);
	85
	86	return 1;
	87	}
	88
0a85b6f0 MT	89	static int dt2817_dio_insn_bits(struct comedi_device *dev,
	90	struct comedi_subdevice *s,
	91	struct comedi_insn insn, unsigned int data)
0e221af2 DS	92	{
	93	unsigned int changed;
	94
	95	/* It's questionable whether it is more important in
	96	* a driver like this to be deterministic or fast.
	97	* We choose fast. */
	98
	99	if (data[0]) {
	100	changed = s->state;
	101	s->state &= ~data[0];
	102	s->state \|= (data[0] & data[1]);
	103	changed ^= s->state;
	104	changed &= s->io_bits;
	105	if (changed & 0x000000ff)
	106	outb(s->state & 0xff, dev->iobase + DT2817_DATA + 0);
	107	if (changed & 0x0000ff00)
	108	outb((s->state >> 8) & 0xff,
0a85b6f0	109	dev->iobase + DT2817_DATA + 1);
0e221af2 DS	110	if (changed & 0x00ff0000)
0e221af2 DS	111	outb((s->state >> 16) & 0xff,
0a85b6f0	112	dev->iobase + DT2817_DATA + 2);
0e221af2 DS	113	if (changed & 0xff000000)
0e221af2 DS	114	outb((s->state >> 24) & 0xff,
0a85b6f0	115	dev->iobase + DT2817_DATA + 3);
0e221af2 DS	116	}
	117	data[1] = inb(dev->iobase + DT2817_DATA + 0);
	118	data[1] \|= (inb(dev->iobase + DT2817_DATA + 1) << 8);
	119	data[1] \|= (inb(dev->iobase + DT2817_DATA + 2) << 16);
	120	data[1] \|= (inb(dev->iobase + DT2817_DATA + 3) << 24);
	121
a2714e3e	122	return insn->n;
0e221af2 DS	123	}
0e221af2 DS	124
da91b269	125	static int dt2817_attach(struct comedi_device dev, struct comedi_devconfig it)
0e221af2 DS	126	{
0e221af2 DS	127	int ret;
34c43922	128	struct comedi_subdevice *s;
0e221af2 DS	129	unsigned long iobase;
	130
	131	iobase = it->options[0];
8cbf7a9e	132	printk(KERN_INFO "comedi%d: dt2817: 0x%04lx ", dev->minor, iobase);
0e221af2 DS	133	if (!request_region(iobase, DT2817_SIZE, "dt2817")) {
	134	printk("I/O port conflict\n");
	135	return -EIO;
	136	}
	137	dev->iobase = iobase;
	138	dev->board_name = "dt2817";
	139
2f0b9d08	140	ret = comedi_alloc_subdevices(dev, 1);
8b6c5694	141	if (ret)
0e221af2 DS	142	return ret;
0e221af2 DS	143
d784e4c3	144	s = &dev->subdevices[0];
0e221af2 DS	145
	146	s->n_chan = 32;
	147	s->type = COMEDI_SUBD_DIO;
	148	s->subdev_flags = SDF_READABLE \| SDF_WRITABLE;
	149	s->range_table = &range_digital;
	150	s->maxdata = 1;
	151	s->insn_bits = dt2817_dio_insn_bits;
	152	s->insn_config = dt2817_dio_insn_config;
	153
	154	s->state = 0;
	155	outb(0, dev->iobase + DT2817_CR);
	156
8cbf7a9e	157	printk(KERN_INFO "\n");
0e221af2 DS	158
	159	return 0;
	160	}
	161
484ecc95	162	static void dt2817_detach(struct comedi_device *dev)
0e221af2	163	{
0e221af2 DS	164	if (dev->iobase)
0e221af2 DS	165	release_region(dev->iobase, DT2817_SIZE);
0e221af2	166	}
90f703d3	167
294f930d	168	static struct comedi_driver dt2817_driver = {
597092fc HS	169	.driver_name = "dt2817",
	170	.module = THIS_MODULE,
	171	.attach = dt2817_attach,
	172	.detach = dt2817_detach,
	173	};
294f930d	174	module_comedi_driver(dt2817_driver);
597092fc	175
90f703d3 AT	176	MODULE_AUTHOR("Comedi http://www.comedi.org");
	177	MODULE_DESCRIPTION("Comedi low-level driver");
	178	MODULE_LICENSE("GPL");