[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;
	/* 12 modules. each can be 70L or 73L */
	unsigned char usp_module_type[12];
	/* for saving previous written value for analog modules */
	unsigned char usp_extra_data[12][4];
	unsigned char usp_prev_wr_val[3];	/* previous written value */
	unsigned char usp_prev_cn_val[3];	/* previous channel value */
};

static int __unioxx5_define_chan_offset(int chan_num)
{

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

	return (chan_num >> 3) + 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

/* 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;
}

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;

	/* correct the read value to 0 or 1 */
	if (channel_offset > 1)
		channel -= 2 << channel_offset;
	*data >>= channel;
	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);
	/* sends module number to card(1 .. 12) */
	outb(module_no + 1, usp->usp_iobase + 5);
	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;
}

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;
	}

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

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

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

	return 1;
}

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)); */
	/* sending module number to card(1 .. 12) */
	outb(module + 1, usp->usp_iobase + 5);
	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_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);
	/* defining module type(analog or digital) */
	type = usp->usp_module_type[channel / 2];

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

	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);
	/* changes type of _one_ channel */
	outb(flags, usp->usp_iobase + channel_offset);
	/* sets channels bank to 0(allows directly input/output) */
	outb(0, usp->usp_iobase + 0);
	/* saves written value */
	usp->usp_prev_cn_val[channel_offset - 1] = flags;

	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: error! --> out of memory!\n", minor);
		return -1;
	}

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

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

		__unioxx5_analog_config(usp, i * 2);
		/* sends channel number to card */
		outb(i + 1, subdev_iobase + 5);
		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;
	/* for digital modules only!!! */
	subdev->insn_config = unioxx5_insn_config;

	printk(KERN_INFO "subdevice configured\n");

	return 0;
}

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 (comedi_alloc_subdevices(dev, n_subd) < 0)
		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(KERN_INFO "attached\n");
	return 0;
}

static void 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);
	}
}

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

MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
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	77	int usp_iobase;
33e73e00 R	78	/* 12 modules. each can be 70L or 73L */
	79	unsigned char usp_module_type[12];
	80	/* for saving previous written value for analog modules */
	81	unsigned char usp_extra_data[12][4];
110526ed KD	82	unsigned char usp_prev_wr_val[3]; /* previous written value */
110526ed KD	83	unsigned char usp_prev_cn_val[3]; /* previous channel value */
33a4640f	84	};
110526ed	85
d22418b0 HS	86	static int __unioxx5_define_chan_offset(int chan_num)
	87	{
	88
	89	if (chan_num < 0 \|\| chan_num > 23)
	90	return -1;
	91
	92	return (chan_num >> 3) + 1;
	93	}
	94
	95	#if 0 /* not used? */
	96	static void __unioxx5_digital_config(struct unioxx5_subd_priv *usp, int mode)
	97	{
	98	int i, mask;
	99
	100	mask = (mode == ALL_2_OUTPUT) ? 0xFF : 0x00;
	101	printk("COMEDI: mode = %d\n", mask);
	102
	103	outb(1, usp->usp_iobase + 0);
	104
	105	for (i = 0; i < 3; i++)
	106	outb(mask, usp->usp_iobase + i);
	107
	108	outb(0, usp->usp_iobase + 0);
	109	}
	110	#endif
	111
	112	/* configure channels for analog i/o (even to output, odd to input) */
	113	static void __unioxx5_analog_config(struct unioxx5_subd_priv *usp, int channel)
	114	{
	115	int chan_a, chan_b, conf, channel_offset;
	116
	117	channel_offset = __unioxx5_define_chan_offset(channel);
	118	conf = usp->usp_prev_cn_val[channel_offset - 1];
	119	chan_a = chan_b = 1;
	120
	121	/* setting channel A and channel B mask */
	122	if (channel % 2 == 0) {
	123	chan_a <<= channel & 0x07;
	124	chan_b <<= (channel + 1) & 0x07;
	125	} else {
	126	chan_a <<= (channel - 1) & 0x07;
	127	chan_b <<= channel & 0x07;
	128	}
	129
	130	conf \|= chan_a; /* even channel ot output */
	131	conf &= ~chan_b; /* odd channel to input */
	132
	133	outb(1, usp->usp_iobase + 0);
	134	outb(conf, usp->usp_iobase + channel_offset);
	135	outb(0, usp->usp_iobase + 0);
	136
	137	usp->usp_prev_cn_val[channel_offset - 1] = conf;
	138	}
	139
0a85b6f0	140	static int __unioxx5_digital_read(struct unioxx5_subd_priv *usp,
d22418b0 HS	141	unsigned int *data, int channel, int minor)
	142	{
	143	int channel_offset, mask = 1 << (channel & 0x07);
	144
	145	channel_offset = __unioxx5_define_chan_offset(channel);
	146	if (channel_offset < 0) {
	147	printk(KERN_ERR
	148	"comedi%d: undefined channel %d. channel range is 0 .. 23\n",
	149	minor, channel);
	150	return 0;
	151	}
	152
	153	*data = inb(usp->usp_iobase + channel_offset);
	154	*data &= mask;
	155
	156	/* correct the read value to 0 or 1 */
	157	if (channel_offset > 1)
	158	channel -= 2 << channel_offset;
	159	*data >>= channel;
	160	return 1;
	161	}
	162
0a85b6f0	163	static int __unioxx5_analog_read(struct unioxx5_subd_priv *usp,
d22418b0 HS	164	unsigned int *data, int channel, int minor)
	165	{
	166	int module_no, read_ch;
	167	char control;
	168
	169	module_no = channel / 2;
	170	read_ch = channel % 2; /* depend on type of channel (A or B) */
	171
	172	/* defining if given module can work on input */
	173	if (usp->usp_module_type[module_no] & MODULE_OUTPUT_MASK) {
	174	printk(KERN_ERR
	175	"comedi%d: module in position %d with id 0x%02x is for output only",
	176	minor, module_no, usp->usp_module_type[module_no]);
	177	return 0;
	178	}
	179
	180	__unioxx5_analog_config(usp, channel);
	181	/* sends module number to card(1 .. 12) */
	182	outb(module_no + 1, usp->usp_iobase + 5);
	183	outb('V', usp->usp_iobase + 6); /* sends to module (V)erify command */
	184	control = inb(usp->usp_iobase); /* get control register byte */
	185
	186	/* waits while reading four bytes will be allowed */
	187	while (!((control = inb(usp->usp_iobase + 0)) & Rx4CA))
	188	;
	189
	190	/* if four bytes readding error occurs - return 0(false) */
	191	if ((control & Rx4CA_ERR_MASK)) {
	192	printk("COMEDI: 4 bytes error\n");
	193	return 0;
	194	}
	195
	196	if (read_ch)
	197	data = inw(usp->usp_iobase + 6); / channel B */
	198	else
	199	data = inw(usp->usp_iobase + 4); / channel A */
	200
	201	return 1;
	202	}
	203
	204	static int __unioxx5_digital_write(struct unioxx5_subd_priv *usp,
	205	unsigned int *data, int channel, int minor)
	206	{
	207	int channel_offset, val;
	208	int mask = 1 << (channel & 0x07);
	209
	210	channel_offset = __unioxx5_define_chan_offset(channel);
	211	if (channel_offset < 0) {
	212	printk(KERN_ERR
	213	"comedi%d: undefined channel %d. channel range is 0 .. 23\n",
	214	minor, channel);
	215	return 0;
	216	}
	217
	218	/* getting previous written value */
	219	val = usp->usp_prev_wr_val[channel_offset - 1];
	220
	221	if (*data)
	222	val \|= mask;
	223	else
	224	val &= ~mask;
	225
	226	outb(val, usp->usp_iobase + channel_offset);
	227	/* saving new written value */
228	usp->usp_prev_wr_val[channel_offset - 1] = val;
229
230	return 1;
231	}
232
233	static int __unioxx5_analog_write(struct unioxx5_subd_priv *usp,
234	unsigned int *data, int channel, int minor)
235	{
236	int module, i;
237
238	module = channel / 2; /* definig module number(0 .. 11) */
239	i = (channel % 2) << 1; /* depends on type of channel (A or B) */
240
241	/* defining if given module can work on output */
242	if (!(usp->usp_module_type[module] & MODULE_OUTPUT_MASK)) {
243	printk(KERN_ERR
244	"comedi%d: module in position %d with id 0x%0x is for input only!\n",
245	minor, module, usp->usp_module_type[module]);
246	return 0;
247	}
248
249	__unioxx5_analog_config(usp, channel);
250	/* saving minor byte */
251	usp->usp_extra_data[module][i++] = (unsigned char)(*data & 0x00FF);
252	/* saving major byte */
253	usp->usp_extra_data[module][i] = (unsigned char)((*data & 0xFF00) >> 8);
254
255	/* while(!((inb(usp->usp_iobase + 0)) & TxBE)); */
256	/* sending module number to card(1 .. 12) */
257	outb(module + 1, usp->usp_iobase + 5);
258	outb('W', usp->usp_iobase + 6); /* sends (W)rite command to module */
259
260	/* sending for bytes to module(one byte per cycle iteration) */
261	for (i = 0; i < 4; i++) {
262	while (!((inb(usp->usp_iobase + 0)) & TxBE))
263	; /* waits while writting will be allowed */
264	outb(usp->usp_extra_data[module][i], usp->usp_iobase + 6);
265	}
266
267	return 1;
268	}
110526ed	269
0a85b6f0 MT	270	static int unioxx5_subdev_read(struct comedi_device *dev,
	271	struct comedi_subdevice *subdev,
	272	struct comedi_insn insn, unsigned int data)
110526ed	273	{
33a4640f	274	struct unioxx5_subd_priv *usp = subdev->private;
110526ed KD	275	int channel, type;
	276
	277	channel = CR_CHAN(insn->chanspec);
33e73e00 R	278	/* defining module type(analog or digital) */
33e73e00 R	279	type = usp->usp_module_type[channel / 2];
110526ed KD	280
	281	if (type == MODULE_DIGITAL) {
	282	if (!__unioxx5_digital_read(usp, data, channel, dev->minor))
	283	return -1;
	284	} else {
	285	if (!__unioxx5_analog_read(usp, data, channel, dev->minor))
	286	return -1;
	287	}
	288
	289	return 1;
	290	}
	291
0a85b6f0 MT	292	static int unioxx5_subdev_write(struct comedi_device *dev,
	293	struct comedi_subdevice *subdev,
	294	struct comedi_insn insn, unsigned int data)
110526ed	295	{
33a4640f	296	struct unioxx5_subd_priv *usp = subdev->private;
110526ed KD	297	int channel, type;
	298
	299	channel = CR_CHAN(insn->chanspec);
33e73e00 R	300	/* defining module type(analog or digital) */
33e73e00 R	301	type = usp->usp_module_type[channel / 2];
110526ed KD	302
	303	if (type == MODULE_DIGITAL) {
	304	if (!__unioxx5_digital_write(usp, data, channel, dev->minor))
	305	return -1;
	306	} else {
	307	if (!__unioxx5_analog_write(usp, data, channel, dev->minor))
	308	return -1;
	309	}
	310
	311	return 1;
	312	}
	313
	314	/* for digital modules only */
0a85b6f0 MT	315	static int unioxx5_insn_config(struct comedi_device *dev,
	316	struct comedi_subdevice *subdev,
	317	struct comedi_insn insn, unsigned int data)
110526ed KD	318	{
110526ed KD	319	int channel_offset, flags, channel = CR_CHAN(insn->chanspec), type;
33a4640f	320	struct unioxx5_subd_priv *usp = subdev->private;
110526ed KD	321	int mask = 1 << (channel & 0x07);
	322
	323	type = usp->usp_module_type[channel / 2];
	324
	325	if (type != MODULE_DIGITAL) {
	326	printk(KERN_ERR
0a85b6f0 MT	327	"comedi%d: channel configuration accessible only for digital modules\n",
0a85b6f0 MT	328	dev->minor);
110526ed KD	329	return -1;
	330	}
	331
c3744138 BP	332	channel_offset = __unioxx5_define_chan_offset(channel);
c3744138 BP	333	if (channel_offset < 0) {
110526ed	334	printk(KERN_ERR
0a85b6f0 MT	335	"comedi%d: undefined channel %d. channel range is 0 .. 23\n",
0a85b6f0 MT	336	dev->minor, channel);
110526ed KD	337	return -1;
	338	}
	339
	340	/* gets previously written value */
	341	flags = usp->usp_prev_cn_val[channel_offset - 1];
	342
	343	switch (*data) {
	344	case COMEDI_INPUT:
	345	flags &= ~mask;
	346	break;
	347	case COMEDI_OUTPUT:
	348	flags \|= mask;
	349	break;
	350	default:
	351	printk(KERN_ERR "comedi%d: unknown flag\n", dev->minor);
	352	return -1;
	353	}
	354
	355	/* *\
	356	* sets channels buffer to 1(after this we are allowed to *
	357	* change channel type on input or output) *
	358	\* */
	359	outb(1, usp->usp_iobase + 0);
33e73e00 R	360	/* changes type of _one_ channel */
	361	outb(flags, usp->usp_iobase + channel_offset);
	362	/* sets channels bank to 0(allows directly input/output) */
	363	outb(0, usp->usp_iobase + 0);
	364	/* saves written value */
	365	usp->usp_prev_cn_val[channel_offset - 1] = flags;
110526ed KD	366
	367	return 0;
	368	}
	369
110526ed	370	/* initializing subdevice with given address */
0a85b6f0 MT	371	static int __unioxx5_subdev_init(struct comedi_subdevice *subdev,
0a85b6f0 MT	372	int subdev_iobase, int minor)
110526ed	373	{
33a4640f	374	struct unioxx5_subd_priv *usp;
110526ed KD	375	int i, to, ndef_flag = 0;
	376
	377	if (!request_region(subdev_iobase, UNIOXX5_SIZE, DRIVER_NAME)) {
	378	printk(KERN_ERR "comedi%d: I/O port conflict\n", minor);
	379	return -EIO;
	380	}
	381
32414878	382	usp = kzalloc(sizeof(*usp), GFP_KERNEL);
c3744138 BP	383
c3744138 BP	384	if (usp == NULL) {
81a14956	385	printk(KERN_ERR "comedi%d: error! --> out of memory!\n", minor);
110526ed KD	386	return -1;
	387	}
	388
	389	usp->usp_iobase = subdev_iobase;
33e73e00	390	printk(KERN_INFO "comedi%d: \|", minor);
110526ed KD	391
	392	/* defining modules types */
	393	for (i = 0; i < 12; i++) {
	394	to = 10000;
	395
	396	__unioxx5_analog_config(usp, i * 2);
33e73e00 R	397	/* sends channel number to card */
33e73e00 R	398	outb(i + 1, subdev_iobase + 5);
110526ed	399	outb('H', subdev_iobase + 6); /* requests EEPROM world */
6fd071cc JS	400	while (!(inb(subdev_iobase + 0) & TxBE))
6fd071cc JS	401	; /* waits while writting will be allowed */
110526ed KD	402	outb(0, subdev_iobase + 6);
	403
	404	/* waits while reading of two bytes will be allowed */
	405	while (!(inb(subdev_iobase + 0) & Rx2CA)) {
	406	if (--to <= 0) {
	407	ndef_flag = 1;
	408	break;
	409	}
	410	}
	411
	412	if (ndef_flag) {
	413	usp->usp_module_type[i] = 0;
	414	ndef_flag = 0;
	415	} else
	416	usp->usp_module_type[i] = inb(subdev_iobase + 6);
	417
	418	printk(" [%d] 0x%02x \|", i, usp->usp_module_type[i]);
5f74ea14	419	udelay(1);
110526ed KD	420	}
	421
	422	printk("\n");
	423
	424	/* initial subdevice for digital or analog i/o */
	425	subdev->type = COMEDI_SUBD_DIO;
	426	subdev->private = usp;
	427	subdev->subdev_flags = SDF_READABLE \| SDF_WRITABLE;
	428	subdev->n_chan = UNIOXX5_NUM_OF_CHANS;
	429	subdev->maxdata = 0xFFF;
	430	subdev->range_table = &range_digital;
	431	subdev->insn_read = unioxx5_subdev_read;
	432	subdev->insn_write = unioxx5_subdev_write;
33e73e00 R	433	/* for digital modules only!!! */
33e73e00 R	434	subdev->insn_config = unioxx5_insn_config;
110526ed	435
33e73e00	436	printk(KERN_INFO "subdevice configured\n");
110526ed KD	437
	438	return 0;
	439	}
	440
40e7f510 HS	441	static int unioxx5_attach(struct comedi_device *dev,
	442	struct comedi_devconfig *it)
	443	{
	444	int iobase, i, n_subd;
	445	int id, num, ba;
	446
	447	iobase = it->options[0];
	448
	449	dev->board_name = DRIVER_NAME;
	450	dev->iobase = iobase;
	451	iobase += UNIOXX5_SUBDEV_BASE;
	452
	453	/* defining number of subdevices and getting they types (it must be 'g01') */
	454	for (i = n_subd = 0, ba = iobase; i < 4; i++, ba += UNIOXX5_SUBDEV_ODDS) {
	455	id = inb(ba + 0xE);
	456	num = inb(ba + 0xF);
	457
	458	if (id != 'g' \|\| num != 1)
	459	continue;
	460
	461	n_subd++;
	462	}
	463
	464	/* unioxx5 can has from two to four subdevices */
	465	if (n_subd < 2) {
	466	printk(KERN_ERR
	467	"your card must has at least 2 'g01' subdevices\n");
	468	return -1;
	469	}
	470
0e4039f3	471	if (comedi_alloc_subdevices(dev, n_subd) < 0)
40e7f510	472	return -ENOMEM;
40e7f510 HS	473
	474	/* initializing each of for same subdevices */
	475	for (i = 0; i < n_subd; i++, iobase += UNIOXX5_SUBDEV_ODDS) {
	476	if (__unioxx5_subdev_init(&dev->subdevices[i], iobase,
	477	dev->minor) < 0)
	478	return -1;
	479	}
	480
	481	printk(KERN_INFO "attached\n");
	482	return 0;
	483	}
	484
484ecc95	485	static void unioxx5_detach(struct comedi_device *dev)
40e7f510 HS	486	{
	487	int i;
	488	struct comedi_subdevice *subdev;
	489	struct unioxx5_subd_priv *usp;
	490
	491	for (i = 0; i < dev->n_subdevices; i++) {
	492	subdev = &dev->subdevices[i];
	493	usp = subdev->private;
	494	release_region(usp->usp_iobase, UNIOXX5_SIZE);
	495	kfree(subdev->private);
	496	}
40e7f510 HS	497	}
	498
	499	static struct comedi_driver unioxx5_driver = {
	500	.driver_name = DRIVER_NAME,
	501	.module = THIS_MODULE,
	502	.attach = unioxx5_attach,
	503	.detach = unioxx5_detach,
	504	};
	505	module_comedi_driver(unioxx5_driver);
	506
90f703d3 AT	507	MODULE_AUTHOR("Comedi http://www.comedi.org");
	508	MODULE_DESCRIPTION("Comedi low-level driver");
	509	MODULE_LICENSE("GPL");