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

/*
    comedi/drivers/ni_at_ao.c
    Driver for NI AT-AO-6/10 boards

    COMEDI - Linux Control and Measurement Device Interface
    Copyright (C) 2000,2002 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: ni_at_ao
Description: National Instruments AT-AO-6/10
Devices: [National Instruments] AT-AO-6 (at-ao-6), AT-AO-10 (at-ao-10)
Status: should work
Author: ds
Updated: Sun Dec 26 12:26:28 EST 2004

Configuration options:
  [0] - I/O port base address
  [1] - IRQ (unused)
  [2] - DMA (unused)
  [3] - analog output range, set by jumpers on hardware (0 for -10 to 10V bipolar, 1 for 0V to 10V unipolar)

*/
/*
 * Register-level programming information can be found in NI
 * document 320379.pdf.
 */

#include "../comedidev.h"

#include <linux/ioport.h>

/* board egisters */
/* registers with _2_ are accessed when GRP2WR is set in CFG1 */

#define ATAO_SIZE 0x20

#define ATAO_2_DMATCCLR		0x00	/* W 16 */
#define ATAO_DIN		0x00	/* R 16 */
#define ATAO_DOUT		0x00	/* W 16 */

#define ATAO_CFG2		0x02	/* W 16 */
#define CALLD1	0x8000
#define CALLD0	0x4000
#define FFRTEN	0x2000
#define DAC2S8	0x1000
#define DAC2S6	0x0800
#define DAC2S4	0x0400
#define DAC2S2	0x0200
#define DAC2S0	0x0100
#define LDAC8		0x0080
#define LDAC6		0x0040
#define LDAC4		0x0020
#define LDAC2		0x0010
#define LDAC0		0x0008
#define PROMEN	0x0004
#define SCLK		0x0002
#define SDATA		0x0001

#define ATAO_2_INT1CLR		0x02	/* W 16 */

#define ATAO_CFG3		0x04	/* W 16 */
#define DMAMODE	0x0040
#define CLKOUT	0x0020
#define RCLKEN	0x0010
#define DOUTEN2	0x0008
#define DOUTEN1	0x0004
#define EN2_5V	0x0002
#define SCANEN	0x0001

#define ATAO_2_INT2CLR		0x04	/* W 16 */

#define ATAO_82C53_BASE		0x06	/* RW 8 */

#define ATAO_82C53_CNTR1	0x06	/* RW 8 */
#define ATAO_82C53_CNTR2	0x07	/* RW 8 */
#define ATAO_82C53_CNTR3	0x08	/* RW 8 */
#define ATAO_82C53_CNTRCMD	0x09	/* W 8 */
#define CNTRSEL1	0x80
#define CNTRSEL0	0x40
#define RWSEL1	0x20
#define RWSEL0	0x10
#define MODESEL2	0x08
#define MODESEL1	0x04
#define MODESEL0	0x02
#define BCDSEL	0x01
  /* read-back command */
#define COUNT		0x20
#define STATUS	0x10
#define CNTR3		0x08
#define CNTR2		0x04
#define CNTR1		0x02
  /* status */
#define OUT		0x80
#define _NULL		0x40
#define RW1		0x20
#define RW0		0x10
#define MODE2		0x08
#define MODE1		0x04
#define MODE0		0x02
#define BCD		0x01

#define ATAO_2_RTSISHFT		0x06	/* W 8 */
#define RSI		0x01

#define ATAO_2_RTSISTRB		0x07	/* W 8 */

#define ATAO_CFG1		0x0a	/* W 16 */
#define EXTINT2EN	0x8000
#define EXTINT1EN	0x4000
#define CNTINT2EN	0x2000
#define CNTINT1EN	0x1000
#define TCINTEN	0x0800
#define CNT1SRC	0x0400
#define CNT2SRC	0x0200
#define FIFOEN	0x0100
#define GRP2WR	0x0080
#define EXTUPDEN	0x0040
#define DMARQ		0x0020
#define DMAEN		0x0010
#define CH_mask	0x000f
#define ATAO_STATUS		0x0a	/* R 16 */
#define FH		0x0040
#define FE		0x0020
#define FF		0x0010
#define INT2		0x0008
#define INT1		0x0004
#define TCINT		0x0002
#define PROMOUT	0x0001

#define ATAO_FIFO_WRITE		0x0c	/* W 16 */
#define ATAO_FIFO_CLEAR		0x0c	/* R 16 */
#define ATAO_DACn(x)		(0x0c + 2*(x))	/* W */

/*
 * Board descriptions for two imaginary boards.  Describing the
 * boards in this way is optional, and completely driver-dependent.
 * Some drivers use arrays such as this, other do not.
 */
struct atao_board {
	const char *name;
	int n_ao_chans;
};

static const struct atao_board atao_boards[] = {
	{
	      name:	"ai-ao-6",
	      n_ao_chans:6,
		},
	{
	      name:	"ai-ao-10",
	      n_ao_chans:10,
		},
};

#define thisboard ((struct atao_board *)dev->board_ptr)

struct atao_private {

	unsigned short cfg1;
	unsigned short cfg2;
	unsigned short cfg3;

	/* Used for AO readback */
	unsigned int ao_readback[10];
};

#define devpriv ((struct atao_private *)dev->private)

static int atao_attach(struct comedi_device * dev, struct comedi_devconfig * it);
static int atao_detach(struct comedi_device * dev);
static struct comedi_driver driver_atao = {
      driver_name:"ni_at_ao",
      module:THIS_MODULE,
      attach:atao_attach,
      detach:atao_detach,
      board_name:&atao_boards[0].name,
      offset:sizeof(struct atao_board),
      num_names:sizeof(atao_boards) / sizeof(struct atao_board),
};

COMEDI_INITCLEANUP(driver_atao);

static void atao_reset(struct comedi_device * dev);

static int atao_ao_winsn(struct comedi_device * dev, struct comedi_subdevice * s,
	struct comedi_insn * insn, unsigned int * data);
static int atao_ao_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
	struct comedi_insn * insn, unsigned int * data);
static int atao_dio_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
	struct comedi_insn * insn, unsigned int * data);
static int atao_dio_insn_config(struct comedi_device * dev, struct comedi_subdevice * s,
	struct comedi_insn * insn, unsigned int * data);
static int atao_calib_insn_read(struct comedi_device * dev, struct comedi_subdevice * s,
	struct comedi_insn * insn, unsigned int * data);
static int atao_calib_insn_write(struct comedi_device * dev, struct comedi_subdevice * s,
	struct comedi_insn * insn, unsigned int * data);

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

	iobase = it->options[0];
	if (iobase == 0)
		iobase = 0x1c0;
	ao_unipolar = it->options[3];

	printk("comedi%d: ni_at_ao: 0x%04lx", dev->minor, iobase);

	if (!request_region(iobase, ATAO_SIZE, "ni_at_ao")) {
		printk(" I/O port conflict\n");
		return -EIO;
	}
	dev->iobase = iobase;

	/* dev->board_ptr = atao_probe(dev); */

	dev->board_name = thisboard->name;

	if (alloc_private(dev, sizeof(struct atao_private)) < 0)
		return -ENOMEM;

	if (alloc_subdevices(dev, 4) < 0)
		return -ENOMEM;

	s = dev->subdevices + 0;
	/* analog output subdevice */
	s->type = COMEDI_SUBD_AO;
	s->subdev_flags = SDF_WRITABLE;
	s->n_chan = thisboard->n_ao_chans;
	s->maxdata = (1 << 12) - 1;
	if (ao_unipolar)
		s->range_table = &range_unipolar10;
	else
		s->range_table = &range_bipolar10;
	s->insn_write = &atao_ao_winsn;
	s->insn_read = &atao_ao_rinsn;

	s = dev->subdevices + 1;
	/* digital i/o subdevice */
	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 = atao_dio_insn_bits;
	s->insn_config = atao_dio_insn_config;

	s = dev->subdevices + 2;
	/* caldac subdevice */
	s->type = COMEDI_SUBD_CALIB;
	s->subdev_flags = SDF_WRITABLE | SDF_INTERNAL;
	s->n_chan = 21;
	s->maxdata = 0xff;
	s->insn_read = atao_calib_insn_read;
	s->insn_write = atao_calib_insn_write;

	s = dev->subdevices + 3;
	/* eeprom subdevice */
	/* s->type=COMEDI_SUBD_EEPROM; */
	s->type = COMEDI_SUBD_UNUSED;

	atao_reset(dev);

	printk("\n");

	return 0;
}

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

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

	return 0;
}

static void atao_reset(struct comedi_device * dev)
{
	/* This is the reset sequence described in the manual */

	devpriv->cfg1 = 0;
	outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);

	outb(RWSEL0 | MODESEL2, dev->iobase + ATAO_82C53_CNTRCMD);
	outb(0x03, dev->iobase + ATAO_82C53_CNTR1);
	outb(CNTRSEL0 | RWSEL0 | MODESEL2, dev->iobase + ATAO_82C53_CNTRCMD);

	devpriv->cfg2 = 0;
	outw(devpriv->cfg2, dev->iobase + ATAO_CFG2);

	devpriv->cfg3 = 0;
	outw(devpriv->cfg3, dev->iobase + ATAO_CFG3);

	inw(dev->iobase + ATAO_FIFO_CLEAR);

	devpriv->cfg1 |= GRP2WR;
	outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);

	outw(0, dev->iobase + ATAO_2_INT1CLR);
	outw(0, dev->iobase + ATAO_2_INT2CLR);
	outw(0, dev->iobase + ATAO_2_DMATCCLR);

	devpriv->cfg1 &= ~GRP2WR;
	outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
}

static int atao_ao_winsn(struct comedi_device * dev, struct comedi_subdevice * s,
	struct comedi_insn * insn, unsigned int * data)
{
	int i;
	int chan = CR_CHAN(insn->chanspec);
	short bits;

	for (i = 0; i < insn->n; i++) {
		bits = data[i] - 0x800;
		if (chan == 0) {
			devpriv->cfg1 |= GRP2WR;
			outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
		}
		outw(bits, dev->iobase + ATAO_DACn(chan));
		if (chan == 0) {
			devpriv->cfg1 &= ~GRP2WR;
			outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
		}
		devpriv->ao_readback[chan] = data[i];
	}

	return i;
}

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

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

	return i;
}

static int atao_dio_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
	struct comedi_insn * insn, unsigned int * data)
{
	if (insn->n != 2)
		return -EINVAL;

	if (data[0]) {
		s->state &= ~data[0];
		s->state |= data[0] & data[1];
		outw(s->state, dev->iobase + ATAO_DOUT);
	}

	data[1] = inw(dev->iobase + ATAO_DIN);

	return 2;
}

static int atao_dio_insn_config(struct comedi_device * dev, struct comedi_subdevice * s,
	struct comedi_insn * insn, unsigned int * data)
{
	int chan = CR_CHAN(insn->chanspec);
	unsigned int mask, bit;

	/* The input or output configuration of each digital line is
	 * configured by a special insn_config instruction.  chanspec
	 * contains the channel to be changed, and data[0] contains the
	 * value COMEDI_INPUT or COMEDI_OUTPUT. */

	mask = (chan < 4) ? 0x0f : 0xf0;
	bit = (chan < 4) ? DOUTEN1 : DOUTEN2;

	switch (data[0]) {
	case INSN_CONFIG_DIO_OUTPUT:
		s->io_bits |= mask;
		devpriv->cfg3 |= bit;
		break;
	case INSN_CONFIG_DIO_INPUT:
		s->io_bits &= ~mask;
		devpriv->cfg3 &= ~bit;
		break;
	case INSN_CONFIG_DIO_QUERY:
		data[1] =
			(s->
			io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT;
		return insn->n;
		break;
	default:
		return -EINVAL;
		break;
	}

	outw(devpriv->cfg3, dev->iobase + ATAO_CFG3);

	return 1;
}

/*
 * Figure 2-1 in the manual shows 3 chips labeled DAC8800, which
 * are 8-channel 8-bit DACs.  These are most likely the calibration
 * DACs.  It is not explicitly stated in the manual how to access
 * the caldacs, but we can guess.
 */
static int atao_calib_insn_read(struct comedi_device * dev, struct comedi_subdevice * s,
	struct comedi_insn * insn, unsigned int * data)
{
	int i;
	for (i = 0; i < insn->n; i++) {
		data[i] = 0;	/* XXX */
	}
	return insn->n;
}

static int atao_calib_insn_write(struct comedi_device * dev, struct comedi_subdevice * s,
	struct comedi_insn * insn, unsigned int * data)
{
	unsigned int bitstring, bit;
	unsigned int chan = CR_CHAN(insn->chanspec);

	bitstring = ((chan & 0x7) << 8) | (data[insn->n - 1] & 0xff);

	for (bit = 1 << (11 - 1); bit; bit >>= 1) {
		outw(devpriv->cfg2 | ((bit & bitstring) ? SDATA : 0),
			dev->iobase + ATAO_CFG2);
		outw(devpriv->cfg2 | SCLK | ((bit & bitstring) ? SDATA : 0),
			dev->iobase + ATAO_CFG2);
	}
	/* strobe the appropriate caldac */
	outw(devpriv->cfg2 | (((chan >> 3) + 1) << 14),
		dev->iobase + ATAO_CFG2);
	outw(devpriv->cfg2, dev->iobase + ATAO_CFG2);

	return insn->n;
}
Commit	Line	Data
6a9d800f DS	1	/*
	2	comedi/drivers/ni_at_ao.c
	3	Driver for NI AT-AO-6/10 boards
	4
	5	COMEDI - Linux Control and Measurement Device Interface
	6	Copyright (C) 2000,2002 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: ni_at_ao
	25	Description: National Instruments AT-AO-6/10
	26	Devices: [National Instruments] AT-AO-6 (at-ao-6), AT-AO-10 (at-ao-10)
	27	Status: should work
	28	Author: ds
	29	Updated: Sun Dec 26 12:26:28 EST 2004
	30
	31	Configuration options:
	32	[0] - I/O port base address
	33	[1] - IRQ (unused)
	34	[2] - DMA (unused)
	35	[3] - analog output range, set by jumpers on hardware (0 for -10 to 10V bipolar, 1 for 0V to 10V unipolar)
	36
	37	*/
	38	/*
	39	* Register-level programming information can be found in NI
	40	* document 320379.pdf.
	41	*/
	42
	43	#include "../comedidev.h"
	44
	45	#include <linux/ioport.h>
	46
	47	/* board egisters */
	48	/* registers with _2_ are accessed when GRP2WR is set in CFG1 */
	49
	50	#define ATAO_SIZE 0x20
	51
	52	#define ATAO_2_DMATCCLR 0x00 /* W 16 */
	53	#define ATAO_DIN 0x00 /* R 16 */
	54	#define ATAO_DOUT 0x00 /* W 16 */
	55
	56	#define ATAO_CFG2 0x02 /* W 16 */
	57	#define CALLD1 0x8000
	58	#define CALLD0 0x4000
	59	#define FFRTEN 0x2000
	60	#define DAC2S8 0x1000
	61	#define DAC2S6 0x0800
	62	#define DAC2S4 0x0400
	63	#define DAC2S2 0x0200
	64	#define DAC2S0 0x0100
65	#define LDAC8 0x0080
66	#define LDAC6 0x0040
67	#define LDAC4 0x0020
68	#define LDAC2 0x0010
69	#define LDAC0 0x0008
70	#define PROMEN 0x0004
71	#define SCLK 0x0002
72	#define SDATA 0x0001
73
74	#define ATAO_2_INT1CLR 0x02 /* W 16 */
75
76	#define ATAO_CFG3 0x04 /* W 16 */
77	#define DMAMODE 0x0040
78	#define CLKOUT 0x0020
79	#define RCLKEN 0x0010
80	#define DOUTEN2 0x0008
81	#define DOUTEN1 0x0004
82	#define EN2_5V 0x0002
83	#define SCANEN 0x0001
84
85	#define ATAO_2_INT2CLR 0x04 /* W 16 */
86
87	#define ATAO_82C53_BASE 0x06 /* RW 8 */
88
89	#define ATAO_82C53_CNTR1 0x06 /* RW 8 */
90	#define ATAO_82C53_CNTR2 0x07 /* RW 8 */
91	#define ATAO_82C53_CNTR3 0x08 /* RW 8 */
92	#define ATAO_82C53_CNTRCMD 0x09 /* W 8 */
93	#define CNTRSEL1 0x80
94	#define CNTRSEL0 0x40
95	#define RWSEL1 0x20
96	#define RWSEL0 0x10
97	#define MODESEL2 0x08
98	#define MODESEL1 0x04
99	#define MODESEL0 0x02
100	#define BCDSEL 0x01
101	/* read-back command */
102	#define COUNT 0x20
103	#define STATUS 0x10
104	#define CNTR3 0x08
105	#define CNTR2 0x04
106	#define CNTR1 0x02
107	/* status */
108	#define OUT 0x80
109	#define _NULL 0x40
110	#define RW1 0x20
111	#define RW0 0x10
112	#define MODE2 0x08
113	#define MODE1 0x04
114	#define MODE0 0x02
115	#define BCD 0x01
116
117	#define ATAO_2_RTSISHFT 0x06 /* W 8 */
118	#define RSI 0x01
119
120	#define ATAO_2_RTSISTRB 0x07 /* W 8 */
121
122	#define ATAO_CFG1 0x0a /* W 16 */
123	#define EXTINT2EN 0x8000
124	#define EXTINT1EN 0x4000
125	#define CNTINT2EN 0x2000
126	#define CNTINT1EN 0x1000
127	#define TCINTEN 0x0800
128	#define CNT1SRC 0x0400
129	#define CNT2SRC 0x0200
130	#define FIFOEN 0x0100
131	#define GRP2WR 0x0080
132	#define EXTUPDEN 0x0040
133	#define DMARQ 0x0020
134	#define DMAEN 0x0010
135	#define CH_mask 0x000f
136	#define ATAO_STATUS 0x0a /* R 16 */
137	#define FH 0x0040
138	#define FE 0x0020
139	#define FF 0x0010
140	#define INT2 0x0008
141	#define INT1 0x0004
142	#define TCINT 0x0002
143	#define PROMOUT 0x0001
144
145	#define ATAO_FIFO_WRITE 0x0c /* W 16 */
146	#define ATAO_FIFO_CLEAR 0x0c /* R 16 */
147	#define ATAO_DACn(x) (0x0c + 2(x)) / W */
148
149	/*
150	* Board descriptions for two imaginary boards. Describing the
151	* boards in this way is optional, and completely driver-dependent.
152	* Some drivers use arrays such as this, other do not.
153	*/
01983c39	154	struct atao_board {
6a9d800f DS	155	const char *name;
6a9d800f DS	156	int n_ao_chans;
01983c39 BP	157	};
	158
	159	static const struct atao_board atao_boards[] = {
6a9d800f DS	160	{
	161	name: "ai-ao-6",
	162	n_ao_chans:6,
	163	},
	164	{
	165	name: "ai-ao-10",
	166	n_ao_chans:10,
	167	},
	168	};
	169
01983c39	170	#define thisboard ((struct atao_board *)dev->board_ptr)
6a9d800f	171
75b80739 BP	172	struct atao_private {
75b80739 BP	173
6a9d800f DS	174	unsigned short cfg1;
	175	unsigned short cfg2;
	176	unsigned short cfg3;
	177
	178	/* Used for AO readback */
790c5541	179	unsigned int ao_readback[10];
75b80739 BP	180	};
	181
	182	#define devpriv ((struct atao_private *)dev->private)
6a9d800f	183
0707bb04	184	static int atao_attach(struct comedi_device * dev, struct comedi_devconfig * it);
71b5f4f1	185	static int atao_detach(struct comedi_device * dev);
139dfbdf	186	static struct comedi_driver driver_atao = {
6a9d800f DS	187	driver_name:"ni_at_ao",
	188	module:THIS_MODULE,
	189	attach:atao_attach,
	190	detach:atao_detach,
	191	board_name:&atao_boards[0].name,
01983c39 BP	192	offset:sizeof(struct atao_board),
01983c39 BP	193	num_names:sizeof(atao_boards) / sizeof(struct atao_board),
6a9d800f DS	194	};
	195
	196	COMEDI_INITCLEANUP(driver_atao);
	197
71b5f4f1	198	static void atao_reset(struct comedi_device * dev);
6a9d800f	199
34c43922	200	static int atao_ao_winsn(struct comedi_device * dev, struct comedi_subdevice * s,
90035c08	201	struct comedi_insn * insn, unsigned int * data);
34c43922	202	static int atao_ao_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
90035c08	203	struct comedi_insn * insn, unsigned int * data);
34c43922	204	static int atao_dio_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
90035c08	205	struct comedi_insn * insn, unsigned int * data);
34c43922	206	static int atao_dio_insn_config(struct comedi_device * dev, struct comedi_subdevice * s,
90035c08	207	struct comedi_insn * insn, unsigned int * data);
34c43922	208	static int atao_calib_insn_read(struct comedi_device * dev, struct comedi_subdevice * s,
90035c08	209	struct comedi_insn * insn, unsigned int * data);
34c43922	210	static int atao_calib_insn_write(struct comedi_device * dev, struct comedi_subdevice * s,
90035c08	211	struct comedi_insn * insn, unsigned int * data);
6a9d800f	212
0707bb04	213	static int atao_attach(struct comedi_device * dev, struct comedi_devconfig * it)
6a9d800f	214	{
34c43922	215	struct comedi_subdevice *s;
6a9d800f DS	216	unsigned long iobase;
	217	int ao_unipolar;
	218
	219	iobase = it->options[0];
	220	if (iobase == 0)
	221	iobase = 0x1c0;
	222	ao_unipolar = it->options[3];
	223
	224	printk("comedi%d: ni_at_ao: 0x%04lx", dev->minor, iobase);
	225
	226	if (!request_region(iobase, ATAO_SIZE, "ni_at_ao")) {
	227	printk(" I/O port conflict\n");
	228	return -EIO;
	229	}
	230	dev->iobase = iobase;
	231
2696fb57	232	/* dev->board_ptr = atao_probe(dev); */
6a9d800f DS	233
	234	dev->board_name = thisboard->name;
	235
75b80739	236	if (alloc_private(dev, sizeof(struct atao_private)) < 0)
6a9d800f DS	237	return -ENOMEM;
	238
	239	if (alloc_subdevices(dev, 4) < 0)
	240	return -ENOMEM;
	241
	242	s = dev->subdevices + 0;
	243	/* analog output subdevice */
	244	s->type = COMEDI_SUBD_AO;
	245	s->subdev_flags = SDF_WRITABLE;
	246	s->n_chan = thisboard->n_ao_chans;
	247	s->maxdata = (1 << 12) - 1;
	248	if (ao_unipolar)
	249	s->range_table = &range_unipolar10;
	250	else
	251	s->range_table = &range_bipolar10;
	252	s->insn_write = &atao_ao_winsn;
	253	s->insn_read = &atao_ao_rinsn;
	254
	255	s = dev->subdevices + 1;
	256	/* digital i/o subdevice */
	257	s->type = COMEDI_SUBD_DIO;
	258	s->subdev_flags = SDF_READABLE \| SDF_WRITABLE;
	259	s->n_chan = 8;
	260	s->maxdata = 1;
	261	s->range_table = &range_digital;
	262	s->insn_bits = atao_dio_insn_bits;
	263	s->insn_config = atao_dio_insn_config;
	264
	265	s = dev->subdevices + 2;
	266	/* caldac subdevice */
	267	s->type = COMEDI_SUBD_CALIB;
	268	s->subdev_flags = SDF_WRITABLE \| SDF_INTERNAL;
	269	s->n_chan = 21;
	270	s->maxdata = 0xff;
	271	s->insn_read = atao_calib_insn_read;
	272	s->insn_write = atao_calib_insn_write;
	273
	274	s = dev->subdevices + 3;
	275	/* eeprom subdevice */
2696fb57	276	/* s->type=COMEDI_SUBD_EEPROM; */
6a9d800f DS	277	s->type = COMEDI_SUBD_UNUSED;
	278
	279	atao_reset(dev);
	280
	281	printk("\n");
	282
	283	return 0;
	284	}
	285
71b5f4f1	286	static int atao_detach(struct comedi_device * dev)
6a9d800f DS	287	{
	288	printk("comedi%d: atao: remove\n", dev->minor);
	289
	290	if (dev->iobase)
	291	release_region(dev->iobase, ATAO_SIZE);
	292
	293	return 0;
	294	}
	295
71b5f4f1	296	static void atao_reset(struct comedi_device * dev)
6a9d800f DS	297	{
	298	/* This is the reset sequence described in the manual */
	299
	300	devpriv->cfg1 = 0;
	301	outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
	302
	303	outb(RWSEL0 \| MODESEL2, dev->iobase + ATAO_82C53_CNTRCMD);
	304	outb(0x03, dev->iobase + ATAO_82C53_CNTR1);
	305	outb(CNTRSEL0 \| RWSEL0 \| MODESEL2, dev->iobase + ATAO_82C53_CNTRCMD);
	306
	307	devpriv->cfg2 = 0;
	308	outw(devpriv->cfg2, dev->iobase + ATAO_CFG2);
	309
	310	devpriv->cfg3 = 0;
	311	outw(devpriv->cfg3, dev->iobase + ATAO_CFG3);
	312
	313	inw(dev->iobase + ATAO_FIFO_CLEAR);
	314
	315	devpriv->cfg1 \|= GRP2WR;
	316	outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
	317
	318	outw(0, dev->iobase + ATAO_2_INT1CLR);
	319	outw(0, dev->iobase + ATAO_2_INT2CLR);
	320	outw(0, dev->iobase + ATAO_2_DMATCCLR);
	321
	322	devpriv->cfg1 &= ~GRP2WR;
	323	outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
	324	}
	325
34c43922	326	static int atao_ao_winsn(struct comedi_device * dev, struct comedi_subdevice * s,
90035c08	327	struct comedi_insn * insn, unsigned int * data)
6a9d800f DS	328	{
	329	int i;
	330	int chan = CR_CHAN(insn->chanspec);
	331	short bits;
	332
	333	for (i = 0; i < insn->n; i++) {
	334	bits = data[i] - 0x800;
	335	if (chan == 0) {
	336	devpriv->cfg1 \|= GRP2WR;
	337	outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
	338	}
	339	outw(bits, dev->iobase + ATAO_DACn(chan));
	340	if (chan == 0) {
	341	devpriv->cfg1 &= ~GRP2WR;
	342	outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
	343	}
	344	devpriv->ao_readback[chan] = data[i];
	345	}
	346
	347	return i;
	348	}
	349
34c43922	350	static int atao_ao_rinsn(struct comedi_device * dev, struct comedi_subdevice * s,
90035c08	351	struct comedi_insn * insn, unsigned int * data)
6a9d800f DS	352	{
	353	int i;
	354	int chan = CR_CHAN(insn->chanspec);
	355
	356	for (i = 0; i < insn->n; i++)
	357	data[i] = devpriv->ao_readback[chan];
	358
	359	return i;
	360	}
	361
34c43922	362	static int atao_dio_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
90035c08	363	struct comedi_insn * insn, unsigned int * data)
6a9d800f DS	364	{
	365	if (insn->n != 2)
	366	return -EINVAL;
	367
	368	if (data[0]) {
	369	s->state &= ~data[0];
	370	s->state \|= data[0] & data[1];
	371	outw(s->state, dev->iobase + ATAO_DOUT);
	372	}
	373
	374	data[1] = inw(dev->iobase + ATAO_DIN);
	375
	376	return 2;
	377	}
	378
34c43922	379	static int atao_dio_insn_config(struct comedi_device * dev, struct comedi_subdevice * s,
90035c08	380	struct comedi_insn * insn, unsigned int * data)
6a9d800f DS	381	{
	382	int chan = CR_CHAN(insn->chanspec);
	383	unsigned int mask, bit;
	384
	385	/* The input or output configuration of each digital line is
	386	* configured by a special insn_config instruction. chanspec
	387	* contains the channel to be changed, and data[0] contains the
	388	* value COMEDI_INPUT or COMEDI_OUTPUT. */
	389
	390	mask = (chan < 4) ? 0x0f : 0xf0;
	391	bit = (chan < 4) ? DOUTEN1 : DOUTEN2;
	392
	393	switch (data[0]) {
	394	case INSN_CONFIG_DIO_OUTPUT:
	395	s->io_bits \|= mask;
	396	devpriv->cfg3 \|= bit;
	397	break;
	398	case INSN_CONFIG_DIO_INPUT:
	399	s->io_bits &= ~mask;
	400	devpriv->cfg3 &= ~bit;
	401	break;
	402	case INSN_CONFIG_DIO_QUERY:
	403	data[1] =
	404	(s->
	405	io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT;
	406	return insn->n;
	407	break;
	408	default:
	409	return -EINVAL;
	410	break;
	411	}
	412
	413	outw(devpriv->cfg3, dev->iobase + ATAO_CFG3);
	414
	415	return 1;
	416	}
	417
	418	/*
	419	* Figure 2-1 in the manual shows 3 chips labeled DAC8800, which
	420	* are 8-channel 8-bit DACs. These are most likely the calibration
	421	* DACs. It is not explicitly stated in the manual how to access
	422	* the caldacs, but we can guess.
	423	*/
34c43922	424	static int atao_calib_insn_read(struct comedi_device * dev, struct comedi_subdevice * s,
90035c08	425	struct comedi_insn * insn, unsigned int * data)
6a9d800f DS	426	{
	427	int i;
	428	for (i = 0; i < insn->n; i++) {
	429	data[i] = 0; /* XXX */
	430	}
	431	return insn->n;
	432	}
	433
34c43922	434	static int atao_calib_insn_write(struct comedi_device * dev, struct comedi_subdevice * s,
90035c08	435	struct comedi_insn * insn, unsigned int * data)
6a9d800f DS	436	{
	437	unsigned int bitstring, bit;
	438	unsigned int chan = CR_CHAN(insn->chanspec);
	439
	440	bitstring = ((chan & 0x7) << 8) \| (data[insn->n - 1] & 0xff);
	441
	442	for (bit = 1 << (11 - 1); bit; bit >>= 1) {
	443	outw(devpriv->cfg2 \| ((bit & bitstring) ? SDATA : 0),
	444	dev->iobase + ATAO_CFG2);
	445	outw(devpriv->cfg2 \| SCLK \| ((bit & bitstring) ? SDATA : 0),
	446	dev->iobase + ATAO_CFG2);
	447	}
	448	/* strobe the appropriate caldac */
	449	outw(devpriv->cfg2 \| (((chan >> 3) + 1) << 14),
	450	dev->iobase + ATAO_CFG2);
	451	outw(devpriv->cfg2, dev->iobase + ATAO_CFG2);
	452
	453	return insn->n;
	454	}