[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / staging / comedi / drivers / unioxx5.c

/***************************************************************************
 *                                                                         *
 *  comedi/drivers/unioxx5.c                                               *
 *  Driver for Fastwel UNIOxx-5 (analog and digital i/o) boards.           *
 *                                                                         *
 *  Copyright (C) 2006 Kruchinin Daniil (asgard) [asgard@etersoft.ru]      *
 *                                                                         *
 *  COMEDI - Linux Control and Measurement Device Interface                *
 *  Copyright (C) 1998,2000 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: unioxx5
Description: Driver for Fastwel UNIOxx-5 (analog and digital i/o) boards.
Author: Kruchinin Daniil (asgard) <asgard@etersoft.ru>
Status: unknown
Updated: 2006-10-09
Devices: [Fastwel] UNIOxx-5 (unioxx5),

 This card supports digital and analog I/O. It written for g01
 subdevices only.
 channels range: 0 .. 23 dio channels
 and 0 .. 11 analog modules range
 During attaching unioxx5 module displays modules identifiers
 (see dmesg after comedi_config) in format:
 | [module_number] module_id |

*/

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

#define DRIVER_NAME "unioxx5"
#define UNIOXX5_SIZE 0x10
#define UNIOXX5_SUBDEV_BASE 0xA000	/* base addr of first subdev */
#define UNIOXX5_SUBDEV_ODDS 0x400

/* modules types */
#define MODULE_DIGITAL 0
#define MODULE_OUTPUT_MASK 0x80	/* analog input/output */

/* constants for digital i/o */
#define UNIOXX5_NUM_OF_CHANS 24

/* constants for analog i/o */
#define TxBE  0x10		/* transmit buffer enable */
#define RxCA  0x20		/* 1 receive character available */
#define Rx2CA 0x40		/* 2 receive character available */
#define Rx4CA 0x80		/* 4 receive character available */

/* bytes mask errors */
#define Rx2CA_ERR_MASK 0x04	/* 2 bytes receiving error */
#define Rx4CA_ERR_MASK 0x08	/* 4 bytes receiving error */

/* channel modes */
#define ALL_2_INPUT  0		/* config all digital channels to input */
#define ALL_2_OUTPUT 1		/* config all digital channels to output */

/* 'private' structure for each subdevice */
struct unioxx5_subd_priv {
	int usp_iobase;
	unsigned char usp_module_type[12];	/* 12 modules. each can be 70L or 73L */
	unsigned char usp_extra_data[12][4];	/* for saving previous written value for analog modules */
	unsigned char usp_prev_wr_val[3];	/* previous written value */
	unsigned char usp_prev_cn_val[3];	/* previous channel value */
};

static int unioxx5_attach(struct comedi_device *dev,
			  struct comedi_devconfig *it);
static int unioxx5_subdev_write(struct comedi_device *dev,
				struct comedi_subdevice *subdev,
				struct comedi_insn *insn, unsigned int *data);
static int unioxx5_subdev_read(struct comedi_device *dev,
			       struct comedi_subdevice *subdev,
			       struct comedi_insn *insn, unsigned int *data);
static int unioxx5_insn_config(struct comedi_device *dev,
			       struct comedi_subdevice *subdev,
			       struct comedi_insn *insn, unsigned int *data);
static int unioxx5_detach(struct comedi_device *dev);
static int __unioxx5_subdev_init(struct comedi_subdevice *subdev,
				 int subdev_iobase, int minor);
static int __unioxx5_digital_write(struct unioxx5_subd_priv *usp,
				   unsigned int *data, int channel, int minor);
static int __unioxx5_digital_read(struct unioxx5_subd_priv *usp,
				  unsigned int *data, int channel, int minor);
/* static void __unioxx5_digital_config(struct unioxx5_subd_priv* usp, int mode); */
static int __unioxx5_analog_write(struct unioxx5_subd_priv *usp,
				  unsigned int *data, int channel, int minor);
static int __unioxx5_analog_read(struct unioxx5_subd_priv *usp,
				 unsigned int *data, int channel, int minor);
static int __unioxx5_define_chan_offset(int chan_num);
static void __unioxx5_analog_config(struct unioxx5_subd_priv *usp, int channel);

static struct comedi_driver unioxx5_driver = {
	.driver_name = DRIVER_NAME,
	.module = THIS_MODULE,
	.attach = unioxx5_attach,
	.detach = unioxx5_detach
};

COMEDI_INITCLEANUP(unioxx5_driver);

static int unioxx5_attach(struct comedi_device *dev,
			  struct comedi_devconfig *it)
{
	int iobase, i, n_subd;
	int id, num, ba;

	iobase = it->options[0];

	dev->board_name = DRIVER_NAME;
	dev->iobase = iobase;
	iobase += UNIOXX5_SUBDEV_BASE;

	/* defining number of subdevices and getting they types (it must be 'g01')  */
	for (i = n_subd = 0, ba = iobase; i < 4; i++, ba += UNIOXX5_SUBDEV_ODDS) {
		id = inb(ba + 0xE);
		num = inb(ba + 0xF);

		if (id != 'g' || num != 1)
			continue;

		n_subd++;
	}

	/* unioxx5 can has from two to four subdevices */
	if (n_subd < 2) {
		printk(KERN_ERR
		       "your card must has at least 2 'g01' subdevices\n");
		return -1;
	}

	if (alloc_subdevices(dev, n_subd) < 0) {
		printk(KERN_ERR "out of memory\n");
		return -ENOMEM;
	}

	/* initializing each of for same subdevices */
	for (i = 0; i < n_subd; i++, iobase += UNIOXX5_SUBDEV_ODDS) {
		if (__unioxx5_subdev_init(&dev->subdevices[i], iobase,
					  dev->minor) < 0)
			return -1;
	}

	printk("attached\n");
	return 0;
}

static int unioxx5_subdev_read(struct comedi_device *dev,
			       struct comedi_subdevice *subdev,
			       struct comedi_insn *insn, unsigned int *data)
{
	struct unioxx5_subd_priv *usp = subdev->private;
	int channel, type;

	channel = CR_CHAN(insn->chanspec);
	type = usp->usp_module_type[channel / 2];	/* defining module type(analog or digital) */

	if (type == MODULE_DIGITAL) {
		if (!__unioxx5_digital_read(usp, data, channel, dev->minor))
			return -1;
	} else {
		if (!__unioxx5_analog_read(usp, data, channel, dev->minor))
			return -1;
	}

	return 1;
}

static int unioxx5_subdev_write(struct comedi_device *dev,
				struct comedi_subdevice *subdev,
				struct comedi_insn *insn, unsigned int *data)
{
	struct unioxx5_subd_priv *usp = subdev->private;
	int channel, type;

	channel = CR_CHAN(insn->chanspec);
	type = usp->usp_module_type[channel / 2];	/* defining module type(analog or digital) */

	if (type == MODULE_DIGITAL) {
		if (!__unioxx5_digital_write(usp, data, channel, dev->minor))
			return -1;
	} else {
		if (!__unioxx5_analog_write(usp, data, channel, dev->minor))
			return -1;
	}

	return 1;
}

/* for digital modules only */
static int unioxx5_insn_config(struct comedi_device *dev,
			       struct comedi_subdevice *subdev,
			       struct comedi_insn *insn, unsigned int *data)
{
	int channel_offset, flags, channel = CR_CHAN(insn->chanspec), type;
	struct unioxx5_subd_priv *usp = subdev->private;
	int mask = 1 << (channel & 0x07);

	type = usp->usp_module_type[channel / 2];

	if (type != MODULE_DIGITAL) {
		printk(KERN_ERR
		       "comedi%d: channel configuration accessible only for digital modules\n",
		       dev->minor);
		return -1;
	}

	channel_offset = __unioxx5_define_chan_offset(channel);
	if (channel_offset < 0) {
		printk(KERN_ERR
		       "comedi%d: undefined channel %d. channel range is 0 .. 23\n",
		       dev->minor, channel);
		return -1;
	}

	/* gets previously written value */
	flags = usp->usp_prev_cn_val[channel_offset - 1];

	switch (*data) {
	case COMEDI_INPUT:
		flags &= ~mask;
		break;
	case COMEDI_OUTPUT:
		flags |= mask;
		break;
	default:
		printk(KERN_ERR "comedi%d: unknown flag\n", dev->minor);
		return -1;
	}

	/*                                                        *\
	 * sets channels buffer to 1(after this we are allowed to *
	 * change channel type on input or output)                *
	 \*                                                        */
	outb(1, usp->usp_iobase + 0);
	outb(flags, usp->usp_iobase + channel_offset);	/* changes type of _one_ channel */
	outb(0, usp->usp_iobase + 0);	/* sets channels bank to 0(allows directly input/output) */
	usp->usp_prev_cn_val[channel_offset - 1] = flags;	/* saves written value */

	return 0;
}

static int unioxx5_detach(struct comedi_device *dev)
{
	int i;
	struct comedi_subdevice *subdev;
	struct unioxx5_subd_priv *usp;

	for (i = 0; i < dev->n_subdevices; i++) {
		subdev = &dev->subdevices[i];
		usp = subdev->private;
		release_region(usp->usp_iobase, UNIOXX5_SIZE);
		kfree(subdev->private);
	}

	return 0;
}

/* initializing subdevice with given address */
static int __unioxx5_subdev_init(struct comedi_subdevice *subdev,
				 int subdev_iobase, int minor)
{
	struct unioxx5_subd_priv *usp;
	int i, to, ndef_flag = 0;

	if (!request_region(subdev_iobase, UNIOXX5_SIZE, DRIVER_NAME)) {
		printk(KERN_ERR "comedi%d: I/O port conflict\n", minor);
		return -EIO;
	}

	usp = kzalloc(sizeof(*usp), GFP_KERNEL);

	if (usp == NULL) {
		printk(KERN_ERR "comedi%d: erorr! --> out of memory!\n", minor);
		return -1;
	}

	usp->usp_iobase = subdev_iobase;
	printk("comedi%d: |", minor);

	/* defining modules types */
	for (i = 0; i < 12; i++) {
		to = 10000;

		__unioxx5_analog_config(usp, i * 2);
		outb(i + 1, subdev_iobase + 5);	/* sends channel number to card */
		outb('H', subdev_iobase + 6);	/* requests EEPROM world */
		while (!(inb(subdev_iobase + 0) & TxBE))
			;	/* waits while writting will be allowed */
		outb(0, subdev_iobase + 6);

		/* waits while reading of two bytes will be allowed */
		while (!(inb(subdev_iobase + 0) & Rx2CA)) {
			if (--to <= 0) {
				ndef_flag = 1;
				break;
			}
		}

		if (ndef_flag) {
			usp->usp_module_type[i] = 0;
			ndef_flag = 0;
		} else
			usp->usp_module_type[i] = inb(subdev_iobase + 6);

		printk(" [%d] 0x%02x |", i, usp->usp_module_type[i]);
		udelay(1);
	}

	printk("\n");

	/* initial subdevice for digital or analog i/o */
	subdev->type = COMEDI_SUBD_DIO;
	subdev->private = usp;
	subdev->subdev_flags = SDF_READABLE | SDF_WRITABLE;
	subdev->n_chan = UNIOXX5_NUM_OF_CHANS;
	subdev->maxdata = 0xFFF;
	subdev->range_table = &range_digital;
	subdev->insn_read = unioxx5_subdev_read;
	subdev->insn_write = unioxx5_subdev_write;
	subdev->insn_config = unioxx5_insn_config;	/* for digital modules only!!! */

	printk("subdevice configured\n");

	return 0;
}

static int __unioxx5_digital_write(struct unioxx5_subd_priv *usp,
				   unsigned int *data, int channel, int minor)
{
	int channel_offset, val;
	int mask = 1 << (channel & 0x07);

	channel_offset = __unioxx5_define_chan_offset(channel);
	if (channel_offset < 0) {
		printk(KERN_ERR
		       "comedi%d: undefined channel %d. channel range is 0 .. 23\n",
		       minor, channel);
		return 0;
	}

	val = usp->usp_prev_wr_val[channel_offset - 1];	/* getting previous written value */

	if (*data)
		val |= mask;
	else
		val &= ~mask;

	outb(val, usp->usp_iobase + channel_offset);
	usp->usp_prev_wr_val[channel_offset - 1] = val;	/* saving new written value */

	return 1;
}

/* function for digital reading */
static int __unioxx5_digital_read(struct unioxx5_subd_priv *usp,
				  unsigned int *data, int channel, int minor)
{
	int channel_offset, mask = 1 << (channel & 0x07);

	channel_offset = __unioxx5_define_chan_offset(channel);
	if (channel_offset < 0) {
		printk(KERN_ERR
		       "comedi%d: undefined channel %d. channel range is 0 .. 23\n",
		       minor, channel);
		return 0;
	}

	*data = inb(usp->usp_iobase + channel_offset);
	*data &= mask;

	if (channel_offset > 1)
		channel -= 2 << channel_offset;	/* this operation is created for correct readed value to 0 or 1 */

	*data >>= channel;
	return 1;
}

#if 0				/* not used? */
static void __unioxx5_digital_config(struct unioxx5_subd_priv *usp, int mode)
{
	int i, mask;

	mask = (mode == ALL_2_OUTPUT) ? 0xFF : 0x00;
	printk("COMEDI: mode = %d\n", mask);

	outb(1, usp->usp_iobase + 0);

	for (i = 0; i < 3; i++)
		outb(mask, usp->usp_iobase + i);

	outb(0, usp->usp_iobase + 0);
}
#endif

static int __unioxx5_analog_write(struct unioxx5_subd_priv *usp,
				  unsigned int *data, int channel, int minor)
{
	int module, i;

	module = channel / 2;	/* definig module number(0 .. 11) */
	i = (channel % 2) << 1;	/* depends on type of channel (A or B) */

	/* defining if given module can work on output */
	if (!(usp->usp_module_type[module] & MODULE_OUTPUT_MASK)) {
		printk(KERN_ERR
		       "comedi%d: module in position %d with id 0x%0x is for input only!\n",
		       minor, module, usp->usp_module_type[module]);
		return 0;
	}

	__unioxx5_analog_config(usp, channel);
	/* saving minor byte */
	usp->usp_extra_data[module][i++] = (unsigned char)(*data & 0x00FF);
	/* saving major byte */
	usp->usp_extra_data[module][i] = (unsigned char)((*data & 0xFF00) >> 8);

	/* while(!((inb(usp->usp_iobase + 0)) & TxBE)); */
	outb(module + 1, usp->usp_iobase + 5);	/* sending module number to card(1 .. 12) */
	outb('W', usp->usp_iobase + 6);	/* sends (W)rite command to module */

	/* sending for bytes to module(one byte per cycle iteration) */
	for (i = 0; i < 4; i++) {
		while (!((inb(usp->usp_iobase + 0)) & TxBE))
			;	/* waits while writting will be allowed */
		outb(usp->usp_extra_data[module][i], usp->usp_iobase + 6);
	}

	return 1;
}

static int __unioxx5_analog_read(struct unioxx5_subd_priv *usp,
				 unsigned int *data, int channel, int minor)
{
	int module_no, read_ch;
	char control;

	module_no = channel / 2;
	read_ch = channel % 2;	/* depend on type of channel (A or B) */

	/* defining if given module can work on input */
	if (usp->usp_module_type[module_no] & MODULE_OUTPUT_MASK) {
		printk(KERN_ERR
		       "comedi%d: module in position %d with id 0x%02x is for output only",
		       minor, module_no, usp->usp_module_type[module_no]);
		return 0;
	}

	__unioxx5_analog_config(usp, channel);
	outb(module_no + 1, usp->usp_iobase + 5);	/* sends module number to card(1 .. 12) */
	outb('V', usp->usp_iobase + 6);	/* sends to module (V)erify command */
	control = inb(usp->usp_iobase);	/* get control register byte */

	/* waits while reading four bytes will be allowed */
	while (!((control = inb(usp->usp_iobase + 0)) & Rx4CA))
		;

	/* if four bytes readding error occurs - return 0(false) */
	if ((control & Rx4CA_ERR_MASK)) {
		printk("COMEDI: 4 bytes error\n");
		return 0;
	}

	if (read_ch)
		*data = inw(usp->usp_iobase + 6);	/* channel B */
	else
		*data = inw(usp->usp_iobase + 4);	/* channel A */

	return 1;
}

/* configure channels for analog i/o (even to output, odd to input) */
static void __unioxx5_analog_config(struct unioxx5_subd_priv *usp, int channel)
{
	int chan_a, chan_b, conf, channel_offset;

	channel_offset = __unioxx5_define_chan_offset(channel);
	conf = usp->usp_prev_cn_val[channel_offset - 1];
	chan_a = chan_b = 1;

	/* setting channel A and channel B mask */
	if (channel % 2 == 0) {
		chan_a <<= channel & 0x07;
		chan_b <<= (channel + 1) & 0x07;
	} else {
		chan_a <<= (channel - 1) & 0x07;
		chan_b <<= channel & 0x07;
	}

	conf |= chan_a;		/* even channel ot output */
	conf &= ~chan_b;	/* odd channel to input */

	outb(1, usp->usp_iobase + 0);
	outb(conf, usp->usp_iobase + channel_offset);
	outb(0, usp->usp_iobase + 0);

	usp->usp_prev_cn_val[channel_offset - 1] = conf;
}

/*                                                    *\
 * this function defines if the given channel number  *
 * enters in default numeric interspace(from 0 to 23) *
 * and it returns address offset for usage needed     *
 * channel.                                           *
\*                                                    */

static int __unioxx5_define_chan_offset(int chan_num)
{

	if (chan_num < 0 || chan_num > 23)
		return -1;

	return (chan_num >> 3) + 1;
}
Commit	Line	Data
110526ed KD	1	/***************************************************************************
	2	* *
	3	* comedi/drivers/unioxx5.c *
	4	* Driver for Fastwel UNIOxx-5 (analog and digital i/o) boards. *
	5	* *
	6	* Copyright (C) 2006 Kruchinin Daniil (asgard) [asgard@etersoft.ru] *
	7	* *
	8	* COMEDI - Linux Control and Measurement Device Interface *
	9	* Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org> *
	10	* *
	11	* This program is free software; you can redistribute it and/or modify *
	12	* it under the terms of the GNU General Public License as published by *
	13	* the Free Software Foundation; either version 2 of the License, or *
	14	* (at your option) any later version. *
	15	* *
	16	* This program is distributed in the hope that it will be useful, *
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
	19	* GNU General Public License for more details. *
	20	* *
	21	* You should have received a copy of the GNU General Public License *
	22	* along with this program; if not, write to the Free Software *
	23	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
	24	* *
	25	***************************************************************************/
	26	/*
	27
	28	Driver: unioxx5
	29	Description: Driver for Fastwel UNIOxx-5 (analog and digital i/o) boards.
	30	Author: Kruchinin Daniil (asgard) <asgard@etersoft.ru>
	31	Status: unknown
	32	Updated: 2006-10-09
	33	Devices: [Fastwel] UNIOxx-5 (unioxx5),
	34
	35	This card supports digital and analog I/O. It written for g01
	36	subdevices only.
	37	channels range: 0 .. 23 dio channels
	38	and 0 .. 11 analog modules range
	39	During attaching unioxx5 module displays modules identifiers
	40	(see dmesg after comedi_config) in format:
	41	\| [module_number] module_id \|
	42
	43	*/
	44
	45	#include "../comedidev.h"
	46	#include <linux/ioport.h>
5a0e3ad6	47	#include <linux/slab.h>
110526ed KD	48
	49	#define DRIVER_NAME "unioxx5"
	50	#define UNIOXX5_SIZE 0x10
	51	#define UNIOXX5_SUBDEV_BASE 0xA000 /* base addr of first subdev */
	52	#define UNIOXX5_SUBDEV_ODDS 0x400
	53
	54	/* modules types */
	55	#define MODULE_DIGITAL 0
	56	#define MODULE_OUTPUT_MASK 0x80 /* analog input/output */
	57
	58	/* constants for digital i/o */
	59	#define UNIOXX5_NUM_OF_CHANS 24
	60
	61	/* constants for analog i/o */
	62	#define TxBE 0x10 /* transmit buffer enable */
	63	#define RxCA 0x20 /* 1 receive character available */
	64	#define Rx2CA 0x40 /* 2 receive character available */
	65	#define Rx4CA 0x80 /* 4 receive character available */
	66
	67	/* bytes mask errors */
	68	#define Rx2CA_ERR_MASK 0x04 /* 2 bytes receiving error */
	69	#define Rx4CA_ERR_MASK 0x08 /* 4 bytes receiving error */
	70
	71	/* channel modes */
	72	#define ALL_2_INPUT 0 /* config all digital channels to input */
	73	#define ALL_2_OUTPUT 1 /* config all digital channels to output */
	74
	75	/* 'private' structure for each subdevice */
33a4640f	76	struct unioxx5_subd_priv {
110526ed KD	77	int usp_iobase;
	78	unsigned char usp_module_type[12]; /* 12 modules. each can be 70L or 73L */
	79	unsigned char usp_extra_data[12][4]; /* for saving previous written value for analog modules */
	80	unsigned char usp_prev_wr_val[3]; /* previous written value */
	81	unsigned char usp_prev_cn_val[3]; /* previous channel value */
33a4640f	82	};
110526ed	83
0a85b6f0 MT	84	static int unioxx5_attach(struct comedi_device *dev,
	85	struct comedi_devconfig *it);
	86	static int unioxx5_subdev_write(struct comedi_device *dev,
	87	struct comedi_subdevice *subdev,
	88	struct comedi_insn insn, unsigned int data);
	89	static int unioxx5_subdev_read(struct comedi_device *dev,
	90	struct comedi_subdevice *subdev,
	91	struct comedi_insn insn, unsigned int data);
	92	static int unioxx5_insn_config(struct comedi_device *dev,
	93	struct comedi_subdevice *subdev,
	94	struct comedi_insn insn, unsigned int data);
da91b269	95	static int unioxx5_detach(struct comedi_device *dev);
0a85b6f0 MT	96	static int __unioxx5_subdev_init(struct comedi_subdevice *subdev,
	97	int subdev_iobase, int minor);
	98	static int __unioxx5_digital_write(struct unioxx5_subd_priv *usp,
	99	unsigned int *data, int channel, int minor);
	100	static int __unioxx5_digital_read(struct unioxx5_subd_priv *usp,
	101	unsigned int *data, int channel, int minor);
2696fb57	102	/* static void __unioxx5_digital_config(struct unioxx5_subd_priv* usp, int mode); */
0a85b6f0 MT	103	static int __unioxx5_analog_write(struct unioxx5_subd_priv *usp,
	104	unsigned int *data, int channel, int minor);
	105	static int __unioxx5_analog_read(struct unioxx5_subd_priv *usp,
	106	unsigned int *data, int channel, int minor);
110526ed	107	static int __unioxx5_define_chan_offset(int chan_num);
da91b269	108	static void __unioxx5_analog_config(struct unioxx5_subd_priv *usp, int channel);
110526ed	109
139dfbdf	110	static struct comedi_driver unioxx5_driver = {
68c3dbff BP	111	.driver_name = DRIVER_NAME,
	112	.module = THIS_MODULE,
	113	.attach = unioxx5_attach,
	114	.detach = unioxx5_detach
110526ed KD	115	};
	116
	117	COMEDI_INITCLEANUP(unioxx5_driver);
	118
0a85b6f0 MT	119	static int unioxx5_attach(struct comedi_device *dev,
0a85b6f0 MT	120	struct comedi_devconfig *it)
110526ed KD	121	{
	122	int iobase, i, n_subd;
	123	int id, num, ba;
	124
	125	iobase = it->options[0];
	126
	127	dev->board_name = DRIVER_NAME;
	128	dev->iobase = iobase;
	129	iobase += UNIOXX5_SUBDEV_BASE;
	130
	131	/* defining number of subdevices and getting they types (it must be 'g01') */
	132	for (i = n_subd = 0, ba = iobase; i < 4; i++, ba += UNIOXX5_SUBDEV_ODDS) {
	133	id = inb(ba + 0xE);
	134	num = inb(ba + 0xF);
	135
	136	if (id != 'g' \|\| num != 1)
	137	continue;
	138
	139	n_subd++;
	140	}
	141
	142	/* unioxx5 can has from two to four subdevices */
	143	if (n_subd < 2) {
	144	printk(KERN_ERR
0a85b6f0	145	"your card must has at least 2 'g01' subdevices\n");
110526ed KD	146	return -1;
	147	}
	148
	149	if (alloc_subdevices(dev, n_subd) < 0) {
	150	printk(KERN_ERR "out of memory\n");
	151	return -ENOMEM;
	152	}
	153
	154	/* initializing each of for same subdevices */
	155	for (i = 0; i < n_subd; i++, iobase += UNIOXX5_SUBDEV_ODDS) {
	156	if (__unioxx5_subdev_init(&dev->subdevices[i], iobase,
0a85b6f0	157	dev->minor) < 0)
110526ed KD	158	return -1;
	159	}
	160
	161	printk("attached\n");
	162	return 0;
	163	}
	164
0a85b6f0 MT	165	static int unioxx5_subdev_read(struct comedi_device *dev,
	166	struct comedi_subdevice *subdev,
	167	struct comedi_insn insn, unsigned int data)
110526ed	168	{
33a4640f	169	struct unioxx5_subd_priv *usp = subdev->private;
110526ed KD	170	int channel, type;
	171
	172	channel = CR_CHAN(insn->chanspec);
	173	type = usp->usp_module_type[channel / 2]; /* defining module type(analog or digital) */
	174
	175	if (type == MODULE_DIGITAL) {
	176	if (!__unioxx5_digital_read(usp, data, channel, dev->minor))
	177	return -1;
	178	} else {
	179	if (!__unioxx5_analog_read(usp, data, channel, dev->minor))
	180	return -1;
	181	}
	182
	183	return 1;
	184	}
	185
0a85b6f0 MT	186	static int unioxx5_subdev_write(struct comedi_device *dev,
	187	struct comedi_subdevice *subdev,
	188	struct comedi_insn insn, unsigned int data)
110526ed	189	{
33a4640f	190	struct unioxx5_subd_priv *usp = subdev->private;
110526ed KD	191	int channel, type;
	192
	193	channel = CR_CHAN(insn->chanspec);
	194	type = usp->usp_module_type[channel / 2]; /* defining module type(analog or digital) */
	195
	196	if (type == MODULE_DIGITAL) {
	197	if (!__unioxx5_digital_write(usp, data, channel, dev->minor))
	198	return -1;
	199	} else {
	200	if (!__unioxx5_analog_write(usp, data, channel, dev->minor))
	201	return -1;
	202	}
	203
	204	return 1;
	205	}
	206
	207	/* for digital modules only */
0a85b6f0 MT	208	static int unioxx5_insn_config(struct comedi_device *dev,
	209	struct comedi_subdevice *subdev,
	210	struct comedi_insn insn, unsigned int data)
110526ed KD	211	{
110526ed KD	212	int channel_offset, flags, channel = CR_CHAN(insn->chanspec), type;
33a4640f	213	struct unioxx5_subd_priv *usp = subdev->private;
110526ed KD	214	int mask = 1 << (channel & 0x07);
	215
	216	type = usp->usp_module_type[channel / 2];
	217
	218	if (type != MODULE_DIGITAL) {
	219	printk(KERN_ERR
0a85b6f0 MT	220	"comedi%d: channel configuration accessible only for digital modules\n",
0a85b6f0 MT	221	dev->minor);
110526ed KD	222	return -1;
	223	}
	224
c3744138 BP	225	channel_offset = __unioxx5_define_chan_offset(channel);
c3744138 BP	226	if (channel_offset < 0) {
110526ed	227	printk(KERN_ERR
0a85b6f0 MT	228	"comedi%d: undefined channel %d. channel range is 0 .. 23\n",
0a85b6f0 MT	229	dev->minor, channel);
110526ed KD	230	return -1;
	231	}
	232
	233	/* gets previously written value */
	234	flags = usp->usp_prev_cn_val[channel_offset - 1];
	235
	236	switch (*data) {
	237	case COMEDI_INPUT:
	238	flags &= ~mask;
	239	break;
	240	case COMEDI_OUTPUT:
	241	flags \|= mask;
	242	break;
	243	default:
	244	printk(KERN_ERR "comedi%d: unknown flag\n", dev->minor);
	245	return -1;
	246	}
	247
	248	/* *\
	249	* sets channels buffer to 1(after this we are allowed to *
	250	* change channel type on input or output) *
	251	\* */
	252	outb(1, usp->usp_iobase + 0);
	253	outb(flags, usp->usp_iobase + channel_offset); /* changes type of _one_ channel */
	254	outb(0, usp->usp_iobase + 0); /* sets channels bank to 0(allows directly input/output) */
	255	usp->usp_prev_cn_val[channel_offset - 1] = flags; /* saves written value */
	256
	257	return 0;
	258	}
	259
da91b269	260	static int unioxx5_detach(struct comedi_device *dev)
110526ed KD	261	{
110526ed KD	262	int i;
34c43922	263	struct comedi_subdevice *subdev;
33a4640f	264	struct unioxx5_subd_priv *usp;
110526ed KD	265
	266	for (i = 0; i < dev->n_subdevices; i++) {
	267	subdev = &dev->subdevices[i];
	268	usp = subdev->private;
	269	release_region(usp->usp_iobase, UNIOXX5_SIZE);
	270	kfree(subdev->private);
	271	}
	272
	273	return 0;
	274	}
	275
	276	/* initializing subdevice with given address */
0a85b6f0 MT	277	static int __unioxx5_subdev_init(struct comedi_subdevice *subdev,
0a85b6f0 MT	278	int subdev_iobase, int minor)
110526ed	279	{
33a4640f	280	struct unioxx5_subd_priv *usp;
110526ed KD	281	int i, to, ndef_flag = 0;
	282
	283	if (!request_region(subdev_iobase, UNIOXX5_SIZE, DRIVER_NAME)) {
	284	printk(KERN_ERR "comedi%d: I/O port conflict\n", minor);
	285	return -EIO;
	286	}
	287
32414878	288	usp = kzalloc(sizeof(*usp), GFP_KERNEL);
c3744138 BP	289
c3744138 BP	290	if (usp == NULL) {
110526ed KD	291	printk(KERN_ERR "comedi%d: erorr! --> out of memory!\n", minor);
	292	return -1;
	293	}
	294
	295	usp->usp_iobase = subdev_iobase;
	296	printk("comedi%d: \|", minor);
	297
	298	/* defining modules types */
	299	for (i = 0; i < 12; i++) {
	300	to = 10000;
	301
	302	__unioxx5_analog_config(usp, i * 2);
	303	outb(i + 1, subdev_iobase + 5); /* sends channel number to card */
	304	outb('H', subdev_iobase + 6); /* requests EEPROM world */
6fd071cc JS	305	while (!(inb(subdev_iobase + 0) & TxBE))
6fd071cc JS	306	; /* waits while writting will be allowed */
110526ed KD	307	outb(0, subdev_iobase + 6);
	308
	309	/* waits while reading of two bytes will be allowed */
	310	while (!(inb(subdev_iobase + 0) & Rx2CA)) {
	311	if (--to <= 0) {
	312	ndef_flag = 1;
	313	break;
	314	}
	315	}
	316
	317	if (ndef_flag) {
	318	usp->usp_module_type[i] = 0;
	319	ndef_flag = 0;
	320	} else
	321	usp->usp_module_type[i] = inb(subdev_iobase + 6);
	322
	323	printk(" [%d] 0x%02x \|", i, usp->usp_module_type[i]);
5f74ea14	324	udelay(1);
110526ed KD	325	}
	326
	327	printk("\n");
	328
	329	/* initial subdevice for digital or analog i/o */
	330	subdev->type = COMEDI_SUBD_DIO;
	331	subdev->private = usp;
	332	subdev->subdev_flags = SDF_READABLE \| SDF_WRITABLE;
	333	subdev->n_chan = UNIOXX5_NUM_OF_CHANS;
	334	subdev->maxdata = 0xFFF;
	335	subdev->range_table = &range_digital;
	336	subdev->insn_read = unioxx5_subdev_read;
	337	subdev->insn_write = unioxx5_subdev_write;
	338	subdev->insn_config = unioxx5_insn_config; /* for digital modules only!!! */
	339
	340	printk("subdevice configured\n");
	341
	342	return 0;
	343	}
	344
0a85b6f0 MT	345	static int __unioxx5_digital_write(struct unioxx5_subd_priv *usp,
0a85b6f0 MT	346	unsigned int *data, int channel, int minor)
110526ed KD	347	{
	348	int channel_offset, val;
	349	int mask = 1 << (channel & 0x07);
	350
c3744138 BP	351	channel_offset = __unioxx5_define_chan_offset(channel);
c3744138 BP	352	if (channel_offset < 0) {
110526ed	353	printk(KERN_ERR
0a85b6f0 MT	354	"comedi%d: undefined channel %d. channel range is 0 .. 23\n",
0a85b6f0 MT	355	minor, channel);
110526ed KD	356	return 0;
	357	}
	358
	359	val = usp->usp_prev_wr_val[channel_offset - 1]; /* getting previous written value */
	360
	361	if (*data)
	362	val \|= mask;
	363	else
	364	val &= ~mask;
	365
	366	outb(val, usp->usp_iobase + channel_offset);
	367	usp->usp_prev_wr_val[channel_offset - 1] = val; /* saving new written value */
	368
	369	return 1;
	370	}
	371
	372	/* function for digital reading */
0a85b6f0 MT	373	static int __unioxx5_digital_read(struct unioxx5_subd_priv *usp,
0a85b6f0 MT	374	unsigned int *data, int channel, int minor)
110526ed KD	375	{
	376	int channel_offset, mask = 1 << (channel & 0x07);
	377
c3744138 BP	378	channel_offset = __unioxx5_define_chan_offset(channel);
c3744138 BP	379	if (channel_offset < 0) {
110526ed	380	printk(KERN_ERR
0a85b6f0 MT	381	"comedi%d: undefined channel %d. channel range is 0 .. 23\n",
0a85b6f0 MT	382	minor, channel);
110526ed KD	383	return 0;
	384	}
	385
	386	*data = inb(usp->usp_iobase + channel_offset);
	387	*data &= mask;
	388
	389	if (channel_offset > 1)
	390	channel -= 2 << channel_offset; /* this operation is created for correct readed value to 0 or 1 */
	391
	392	*data >>= channel;
	393	return 1;
	394	}
	395
	396	#if 0 /* not used? */
da91b269	397	static void __unioxx5_digital_config(struct unioxx5_subd_priv *usp, int mode)
110526ed KD	398	{
	399	int i, mask;
	400
	401	mask = (mode == ALL_2_OUTPUT) ? 0xFF : 0x00;
	402	printk("COMEDI: mode = %d\n", mask);
	403
	404	outb(1, usp->usp_iobase + 0);
	405
	406	for (i = 0; i < 3; i++)
	407	outb(mask, usp->usp_iobase + i);
	408
	409	outb(0, usp->usp_iobase + 0);
	410	}
	411	#endif
	412
0a85b6f0 MT	413	static int __unioxx5_analog_write(struct unioxx5_subd_priv *usp,
0a85b6f0 MT	414	unsigned int *data, int channel, int minor)
110526ed KD	415	{
	416	int module, i;
	417
	418	module = channel / 2; /* definig module number(0 .. 11) */
	419	i = (channel % 2) << 1; /* depends on type of channel (A or B) */
	420
	421	/* defining if given module can work on output */
	422	if (!(usp->usp_module_type[module] & MODULE_OUTPUT_MASK)) {
	423	printk(KERN_ERR
0a85b6f0 MT	424	"comedi%d: module in position %d with id 0x%0x is for input only!\n",
0a85b6f0 MT	425	minor, module, usp->usp_module_type[module]);
110526ed KD	426	return 0;
	427	}
	428
	429	__unioxx5_analog_config(usp, channel);
	430	/* saving minor byte */
	431	usp->usp_extra_data[module][i++] = (unsigned char)(*data & 0x00FF);
	432	/* saving major byte */
	433	usp->usp_extra_data[module][i] = (unsigned char)((*data & 0xFF00) >> 8);
	434
2696fb57	435	/* while(!((inb(usp->usp_iobase + 0)) & TxBE)); */
110526ed KD	436	outb(module + 1, usp->usp_iobase + 5); /* sending module number to card(1 .. 12) */
	437	outb('W', usp->usp_iobase + 6); /* sends (W)rite command to module */
	438
	439	/* sending for bytes to module(one byte per cycle iteration) */
	440	for (i = 0; i < 4; i++) {
6fd071cc JS	441	while (!((inb(usp->usp_iobase + 0)) & TxBE))
6fd071cc JS	442	; /* waits while writting will be allowed */
110526ed KD	443	outb(usp->usp_extra_data[module][i], usp->usp_iobase + 6);
	444	}
	445
	446	return 1;
	447	}
	448
0a85b6f0 MT	449	static int __unioxx5_analog_read(struct unioxx5_subd_priv *usp,
0a85b6f0 MT	450	unsigned int *data, int channel, int minor)
110526ed KD	451	{
	452	int module_no, read_ch;
	453	char control;
	454
	455	module_no = channel / 2;
	456	read_ch = channel % 2; /* depend on type of channel (A or B) */
	457
	458	/* defining if given module can work on input */
	459	if (usp->usp_module_type[module_no] & MODULE_OUTPUT_MASK) {
	460	printk(KERN_ERR
0a85b6f0 MT	461	"comedi%d: module in position %d with id 0x%02x is for output only",
0a85b6f0 MT	462	minor, module_no, usp->usp_module_type[module_no]);
110526ed KD	463	return 0;
	464	}
	465
	466	__unioxx5_analog_config(usp, channel);
	467	outb(module_no + 1, usp->usp_iobase + 5); /* sends module number to card(1 .. 12) */
	468	outb('V', usp->usp_iobase + 6); /* sends to module (V)erify command */
	469	control = inb(usp->usp_iobase); /* get control register byte */
	470
	471	/* waits while reading four bytes will be allowed */
6fd071cc JS	472	while (!((control = inb(usp->usp_iobase + 0)) & Rx4CA))
6fd071cc JS	473	;
110526ed KD	474
	475	/* if four bytes readding error occurs - return 0(false) */
	476	if ((control & Rx4CA_ERR_MASK)) {
	477	printk("COMEDI: 4 bytes error\n");
	478	return 0;
	479	}
	480
	481	if (read_ch)
	482	data = inw(usp->usp_iobase + 6); / channel B */
	483	else
	484	data = inw(usp->usp_iobase + 4); / channel A */
	485
	486	return 1;
	487	}
	488
	489	/* configure channels for analog i/o (even to output, odd to input) */
da91b269	490	static void __unioxx5_analog_config(struct unioxx5_subd_priv *usp, int channel)
110526ed KD	491	{
	492	int chan_a, chan_b, conf, channel_offset;
	493
	494	channel_offset = __unioxx5_define_chan_offset(channel);
	495	conf = usp->usp_prev_cn_val[channel_offset - 1];
	496	chan_a = chan_b = 1;
	497
	498	/* setting channel A and channel B mask */
	499	if (channel % 2 == 0) {
	500	chan_a <<= channel & 0x07;
	501	chan_b <<= (channel + 1) & 0x07;
	502	} else {
	503	chan_a <<= (channel - 1) & 0x07;
	504	chan_b <<= channel & 0x07;
	505	}
	506
	507	conf \|= chan_a; /* even channel ot output */
	508	conf &= ~chan_b; /* odd channel to input */
	509
	510	outb(1, usp->usp_iobase + 0);
	511	outb(conf, usp->usp_iobase + channel_offset);
	512	outb(0, usp->usp_iobase + 0);
	513
	514	usp->usp_prev_cn_val[channel_offset - 1] = conf;
	515	}
	516
	517	/* *\
	518	* this function defines if the given channel number *
	519	* enters in default numeric interspace(from 0 to 23) *
	520	* and it returns address offset for usage needed *
	521	* channel. *
	522	\* */
	523
	524	static int __unioxx5_define_chan_offset(int chan_num)
	525	{
	526
	527	if (chan_num < 0 \|\| chan_num > 23)
	528	return -1;
	529
	530	return (chan_num >> 3) + 1;
	531	}