[deliverable/linux.git] / drivers / staging / comedi / drivers / rti802.c

/*
   comedi/drivers/rti802.c
   Hardware driver for Analog Devices RTI-802 board

   COMEDI - Linux Control and Measurement Device Interface
   Copyright (C) 1999 Anders Blomdell <anders.blomdell@control.lth.se>

   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: rti802
Description: Analog Devices RTI-802
Author: Anders Blomdell <anders.blomdell@control.lth.se>
Devices: [Analog Devices] RTI-802 (rti802)
Status: works

Configuration Options:
    [0] - i/o base
    [1] - unused
    [2] - dac#0  0=two's comp, 1=straight
    [3] - dac#0  0=bipolar, 1=unipolar
    [4] - dac#1 ...
    ...
    [17] - dac#7 ...
*/

#include "../comedidev.h"

#include <linux/ioport.h>

#define RTI802_SIZE 4

#define RTI802_SELECT 0
#define RTI802_DATALOW 1
#define RTI802_DATAHIGH 2

struct rti802_private {
	enum {
		dac_2comp, dac_straight
	} dac_coding[8];
	const struct comedi_lrange *range_type_list[8];
	unsigned int ao_readback[8];
};

static int rti802_ao_insn_read(struct comedi_device *dev,
			       struct comedi_subdevice *s,
			       struct comedi_insn *insn, unsigned int *data)
{
	struct rti802_private *devpriv = dev->private;
	int i;

	for (i = 0; i < insn->n; i++)
		data[i] = devpriv->ao_readback[CR_CHAN(insn->chanspec)];

	return i;
}

static int rti802_ao_insn_write(struct comedi_device *dev,
				struct comedi_subdevice *s,
				struct comedi_insn *insn, unsigned int *data)
{
	struct rti802_private *devpriv = dev->private;
	int i, d;
	int chan = CR_CHAN(insn->chanspec);

	for (i = 0; i < insn->n; i++) {
		d = devpriv->ao_readback[chan] = data[i];
		if (devpriv->dac_coding[chan] == dac_2comp)
			d ^= 0x800;
		outb(chan, dev->iobase + RTI802_SELECT);
		outb(d & 0xff, dev->iobase + RTI802_DATALOW);
		outb(d >> 8, dev->iobase + RTI802_DATAHIGH);
	}
	return i;
}

static int rti802_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
	struct rti802_private *devpriv;
	struct comedi_subdevice *s;
	int i;
	unsigned long iobase;
	int ret;

	iobase = it->options[0];
	printk(KERN_INFO "comedi%d: rti802: 0x%04lx ", dev->minor, iobase);
	if (!request_region(iobase, RTI802_SIZE, "rti802")) {
		printk(KERN_WARNING "I/O port conflict\n");
		return -EIO;
	}
	dev->iobase = iobase;

	dev->board_name = "rti802";

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

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

	s = &dev->subdevices[0];
	/* ao subdevice */
	s->type = COMEDI_SUBD_AO;
	s->subdev_flags = SDF_WRITABLE;
	s->maxdata = 0xfff;
	s->n_chan = 8;
	s->insn_read = rti802_ao_insn_read;
	s->insn_write = rti802_ao_insn_write;
	s->range_table_list = devpriv->range_type_list;

	for (i = 0; i < 8; i++) {
		devpriv->dac_coding[i] = (it->options[3 + 2 * i])
		    ? (dac_straight)
		    : (dac_2comp);
		devpriv->range_type_list[i] = (it->options[2 + 2 * i])
		    ? &range_unipolar10 : &range_bipolar10;
	}

	return 0;
}

static void rti802_detach(struct comedi_device *dev)
{
	if (dev->iobase)
		release_region(dev->iobase, RTI802_SIZE);
}

static struct comedi_driver rti802_driver = {
	.driver_name	= "rti802",
	.module		= THIS_MODULE,
	.attach		= rti802_attach,
	.detach		= rti802_detach,
};
module_comedi_driver(rti802_driver);

MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
a7b5a2c4 AB	1	/*
	2	comedi/drivers/rti802.c
	3	Hardware driver for Analog Devices RTI-802 board
	4
	5	COMEDI - Linux Control and Measurement Device Interface
	6	Copyright (C) 1999 Anders Blomdell <anders.blomdell@control.lth.se>
	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: rti802
	25	Description: Analog Devices RTI-802
	26	Author: Anders Blomdell <anders.blomdell@control.lth.se>
	27	Devices: [Analog Devices] RTI-802 (rti802)
	28	Status: works
	29
	30	Configuration Options:
	31	[0] - i/o base
	32	[1] - unused
	33	[2] - dac#0 0=two's comp, 1=straight
	34	[3] - dac#0 0=bipolar, 1=unipolar
	35	[4] - dac#1 ...
	36	...
	37	[17] - dac#7 ...
	38	*/
	39
	40	#include "../comedidev.h"
	41
	42	#include <linux/ioport.h>
	43
	44	#define RTI802_SIZE 4
	45
	46	#define RTI802_SELECT 0
	47	#define RTI802_DATALOW 1
	48	#define RTI802_DATAHIGH 2
	49
201007e8	50	struct rti802_private {
a7b5a2c4 AB	51	enum {
	52	dac_2comp, dac_straight
	53	} dac_coding[8];
9ced1de6	54	const struct comedi_lrange *range_type_list[8];
790c5541	55	unsigned int ao_readback[8];
201007e8	56	};
a7b5a2c4	57
0a85b6f0 MT	58	static int rti802_ao_insn_read(struct comedi_device *dev,
	59	struct comedi_subdevice *s,
	60	struct comedi_insn insn, unsigned int data)
a7b5a2c4	61	{
9a1a6cf8	62	struct rti802_private *devpriv = dev->private;
a7b5a2c4 AB	63	int i;
	64
	65	for (i = 0; i < insn->n; i++)
	66	data[i] = devpriv->ao_readback[CR_CHAN(insn->chanspec)];
	67
	68	return i;
	69	}
	70
0a85b6f0 MT	71	static int rti802_ao_insn_write(struct comedi_device *dev,
	72	struct comedi_subdevice *s,
	73	struct comedi_insn insn, unsigned int data)
a7b5a2c4	74	{
9a1a6cf8	75	struct rti802_private *devpriv = dev->private;
a7b5a2c4 AB	76	int i, d;
	77	int chan = CR_CHAN(insn->chanspec);
	78
	79	for (i = 0; i < insn->n; i++) {
	80	d = devpriv->ao_readback[chan] = data[i];
	81	if (devpriv->dac_coding[chan] == dac_2comp)
	82	d ^= 0x800;
	83	outb(chan, dev->iobase + RTI802_SELECT);
	84	outb(d & 0xff, dev->iobase + RTI802_DATALOW);
	85	outb(d >> 8, dev->iobase + RTI802_DATAHIGH);
	86	}
	87	return i;
	88	}
	89
da91b269	90	static int rti802_attach(struct comedi_device dev, struct comedi_devconfig it)
a7b5a2c4	91	{
9a1a6cf8	92	struct rti802_private *devpriv;
34c43922	93	struct comedi_subdevice *s;
a7b5a2c4 AB	94	int i;
a7b5a2c4 AB	95	unsigned long iobase;
8b6c5694	96	int ret;
a7b5a2c4 AB	97
a7b5a2c4 AB	98	iobase = it->options[0];
83c41dab	99	printk(KERN_INFO "comedi%d: rti802: 0x%04lx ", dev->minor, iobase);
a7b5a2c4	100	if (!request_region(iobase, RTI802_SIZE, "rti802")) {
83c41dab	101	printk(KERN_WARNING "I/O port conflict\n");
a7b5a2c4 AB	102	return -EIO;
	103	}
	104	dev->iobase = iobase;
	105
	106	dev->board_name = "rti802";
	107
c34fa261 HS	108	devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
	109	if (!devpriv)
	110	return -ENOMEM;
	111	dev->private = devpriv;
8b6c5694 HS	112
	113	ret = comedi_alloc_subdevices(dev, 1);
	114	if (ret)
	115	return ret;
a7b5a2c4	116
7badc90d	117	s = &dev->subdevices[0];
a7b5a2c4 AB	118	/* ao subdevice */
	119	s->type = COMEDI_SUBD_AO;
	120	s->subdev_flags = SDF_WRITABLE;
	121	s->maxdata = 0xfff;
	122	s->n_chan = 8;
	123	s->insn_read = rti802_ao_insn_read;
	124	s->insn_write = rti802_ao_insn_write;
	125	s->range_table_list = devpriv->range_type_list;
	126
	127	for (i = 0; i < 8; i++) {
	128	devpriv->dac_coding[i] = (it->options[3 + 2 * i])
0a85b6f0 MT	129	? (dac_straight)
0a85b6f0 MT	130	: (dac_2comp);
a7b5a2c4	131	devpriv->range_type_list[i] = (it->options[2 + 2 * i])
0a85b6f0	132	? &range_unipolar10 : &range_bipolar10;
a7b5a2c4 AB	133	}
a7b5a2c4 AB	134
a7b5a2c4 AB	135	return 0;
	136	}
	137
484ecc95	138	static void rti802_detach(struct comedi_device *dev)
a7b5a2c4	139	{
a7b5a2c4 AB	140	if (dev->iobase)
a7b5a2c4 AB	141	release_region(dev->iobase, RTI802_SIZE);
a7b5a2c4	142	}
90f703d3	143
294f930d	144	static struct comedi_driver rti802_driver = {
cb5f5237 HS	145	.driver_name = "rti802",
	146	.module = THIS_MODULE,
	147	.attach = rti802_attach,
	148	.detach = rti802_detach,
	149	};
294f930d	150	module_comedi_driver(rti802_driver);
cb5f5237	151
90f703d3 AT	152	MODULE_AUTHOR("Comedi http://www.comedi.org");
	153	MODULE_DESCRIPTION("Comedi low-level driver");
	154	MODULE_LICENSE("GPL");