[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>

#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;
	}

	if ((channel_offset = __unioxx5_define_chan_offset(channel)) < 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;
	}

	if ((usp = (struct unioxx5_subd_priv *) kzalloc(sizeof(*usp),
				GFP_KERNEL)) == 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]);
		comedi_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);

	if ((channel_offset = __unioxx5_define_chan_offset(channel)) < 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);

	if ((channel_offset = __unioxx5_define_chan_offset(channel)) < 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>
	47
	48	#define DRIVER_NAME "unioxx5"
	49	#define UNIOXX5_SIZE 0x10
	50	#define UNIOXX5_SUBDEV_BASE 0xA000 /* base addr of first subdev */
	51	#define UNIOXX5_SUBDEV_ODDS 0x400
	52
	53	/* modules types */
	54	#define MODULE_DIGITAL 0
	55	#define MODULE_OUTPUT_MASK 0x80 /* analog input/output */
	56
	57	/* constants for digital i/o */
	58	#define UNIOXX5_NUM_OF_CHANS 24
	59
	60	/* constants for analog i/o */
	61	#define TxBE 0x10 /* transmit buffer enable */
	62	#define RxCA 0x20 /* 1 receive character available */
	63	#define Rx2CA 0x40 /* 2 receive character available */
	64	#define Rx4CA 0x80 /* 4 receive character available */
65
66	/* bytes mask errors */
67	#define Rx2CA_ERR_MASK 0x04 /* 2 bytes receiving error */
68	#define Rx4CA_ERR_MASK 0x08 /* 4 bytes receiving error */
69
70	/* channel modes */
71	#define ALL_2_INPUT 0 /* config all digital channels to input */
72	#define ALL_2_OUTPUT 1 /* config all digital channels to output */
73
74	/* 'private' structure for each subdevice */
33a4640f	75	struct unioxx5_subd_priv {
110526ed KD	76	int usp_iobase;
	77	unsigned char usp_module_type[12]; /* 12 modules. each can be 70L or 73L */
	78	unsigned char usp_extra_data[12][4]; /* for saving previous written value for analog modules */
	79	unsigned char usp_prev_wr_val[3]; /* previous written value */
	80	unsigned char usp_prev_cn_val[3]; /* previous channel value */
33a4640f	81	};
110526ed	82
0707bb04	83	static int unioxx5_attach(struct comedi_device * dev, struct comedi_devconfig * it);
34c43922	84	static int unioxx5_subdev_write(struct comedi_device * dev, struct comedi_subdevice * subdev,
90035c08	85	struct comedi_insn * insn, unsigned int * data);
34c43922	86	static int unioxx5_subdev_read(struct comedi_device * dev, struct comedi_subdevice * subdev,
90035c08	87	struct comedi_insn * insn, unsigned int * data);
34c43922	88	static int unioxx5_insn_config(struct comedi_device * dev, struct comedi_subdevice * subdev,
90035c08	89	struct comedi_insn * insn, unsigned int * data);
71b5f4f1	90	static int unioxx5_detach(struct comedi_device * dev);
34c43922	91	static int __unioxx5_subdev_init(struct comedi_subdevice * subdev, int subdev_iobase,
110526ed	92	int minor);
33a4640f	93	static int __unioxx5_digital_write(struct unioxx5_subd_priv * usp, unsigned int * data,
110526ed	94	int channel, int minor);
33a4640f	95	static int __unioxx5_digital_read(struct unioxx5_subd_priv * usp, unsigned int * data,
110526ed	96	int channel, int minor);
2696fb57	97	/* static void __unioxx5_digital_config(struct unioxx5_subd_priv* usp, int mode); */
33a4640f	98	static int __unioxx5_analog_write(struct unioxx5_subd_priv * usp, unsigned int * data,
110526ed	99	int channel, int minor);
33a4640f	100	static int __unioxx5_analog_read(struct unioxx5_subd_priv * usp, unsigned int * data,
110526ed KD	101	int channel, int minor);
110526ed KD	102	static int __unioxx5_define_chan_offset(int chan_num);
33a4640f	103	static void __unioxx5_analog_config(struct unioxx5_subd_priv * usp, int channel);
110526ed	104
139dfbdf	105	static struct comedi_driver unioxx5_driver = {
110526ed KD	106	driver_name:DRIVER_NAME,
	107	module:THIS_MODULE,
	108	attach:unioxx5_attach,
	109	detach:unioxx5_detach
	110	};
	111
	112	COMEDI_INITCLEANUP(unioxx5_driver);
	113
0707bb04	114	static int unioxx5_attach(struct comedi_device * dev, struct comedi_devconfig * it)
110526ed KD	115	{
	116	int iobase, i, n_subd;
	117	int id, num, ba;
	118
	119	iobase = it->options[0];
	120
	121	dev->board_name = DRIVER_NAME;
	122	dev->iobase = iobase;
	123	iobase += UNIOXX5_SUBDEV_BASE;
	124
	125	/* defining number of subdevices and getting they types (it must be 'g01') */
	126	for (i = n_subd = 0, ba = iobase; i < 4; i++, ba += UNIOXX5_SUBDEV_ODDS) {
	127	id = inb(ba + 0xE);
	128	num = inb(ba + 0xF);
	129
	130	if (id != 'g' \|\| num != 1)
	131	continue;
	132
	133	n_subd++;
	134	}
	135
	136	/* unioxx5 can has from two to four subdevices */
	137	if (n_subd < 2) {
	138	printk(KERN_ERR
	139	"your card must has at least 2 'g01' subdevices\n");
	140	return -1;
	141	}
	142
	143	if (alloc_subdevices(dev, n_subd) < 0) {
	144	printk(KERN_ERR "out of memory\n");
	145	return -ENOMEM;
	146	}
	147
	148	/* initializing each of for same subdevices */
	149	for (i = 0; i < n_subd; i++, iobase += UNIOXX5_SUBDEV_ODDS) {
	150	if (__unioxx5_subdev_init(&dev->subdevices[i], iobase,
	151	dev->minor) < 0)
	152	return -1;
	153	}
	154
	155	printk("attached\n");
	156	return 0;
	157	}
	158
34c43922	159	static int unioxx5_subdev_read(struct comedi_device * dev, struct comedi_subdevice * subdev,
90035c08	160	struct comedi_insn * insn, unsigned int * data)
110526ed	161	{
33a4640f	162	struct unioxx5_subd_priv *usp = subdev->private;
110526ed KD	163	int channel, type;
	164
	165	channel = CR_CHAN(insn->chanspec);
	166	type = usp->usp_module_type[channel / 2]; /* defining module type(analog or digital) */
	167
	168	if (type == MODULE_DIGITAL) {
	169	if (!__unioxx5_digital_read(usp, data, channel, dev->minor))
	170	return -1;
	171	} else {
	172	if (!__unioxx5_analog_read(usp, data, channel, dev->minor))
	173	return -1;
	174	}
	175
	176	return 1;
	177	}
	178
34c43922	179	static int unioxx5_subdev_write(struct comedi_device * dev, struct comedi_subdevice * subdev,
90035c08	180	struct comedi_insn * insn, unsigned int * data)
110526ed	181	{
33a4640f	182	struct unioxx5_subd_priv *usp = subdev->private;
110526ed KD	183	int channel, type;
	184
	185	channel = CR_CHAN(insn->chanspec);
	186	type = usp->usp_module_type[channel / 2]; /* defining module type(analog or digital) */
	187
	188	if (type == MODULE_DIGITAL) {
	189	if (!__unioxx5_digital_write(usp, data, channel, dev->minor))
	190	return -1;
	191	} else {
	192	if (!__unioxx5_analog_write(usp, data, channel, dev->minor))
	193	return -1;
	194	}
	195
	196	return 1;
	197	}
	198
	199	/* for digital modules only */
34c43922	200	static int unioxx5_insn_config(struct comedi_device * dev, struct comedi_subdevice * subdev,
90035c08	201	struct comedi_insn * insn, unsigned int * data)
110526ed KD	202	{
110526ed KD	203	int channel_offset, flags, channel = CR_CHAN(insn->chanspec), type;
33a4640f	204	struct unioxx5_subd_priv *usp = subdev->private;
110526ed KD	205	int mask = 1 << (channel & 0x07);
	206
	207	type = usp->usp_module_type[channel / 2];
	208
	209	if (type != MODULE_DIGITAL) {
	210	printk(KERN_ERR
	211	"comedi%d: channel configuration accessible only for digital modules\n",
	212	dev->minor);
	213	return -1;
	214	}
	215
	216	if ((channel_offset = __unioxx5_define_chan_offset(channel)) < 0) {
	217	printk(KERN_ERR
	218	"comedi%d: undefined channel %d. channel range is 0 .. 23\n",
	219	dev->minor, channel);
	220	return -1;
	221	}
	222
	223	/* gets previously written value */
	224	flags = usp->usp_prev_cn_val[channel_offset - 1];
	225
	226	switch (*data) {
	227	case COMEDI_INPUT:
	228	flags &= ~mask;
	229	break;
	230	case COMEDI_OUTPUT:
	231	flags \|= mask;
	232	break;
	233	default:
	234	printk(KERN_ERR "comedi%d: unknown flag\n", dev->minor);
	235	return -1;
	236	}
	237
	238	/* *\
	239	* sets channels buffer to 1(after this we are allowed to *
	240	* change channel type on input or output) *
	241	\* */
	242	outb(1, usp->usp_iobase + 0);
	243	outb(flags, usp->usp_iobase + channel_offset); /* changes type of _one_ channel */
	244	outb(0, usp->usp_iobase + 0); /* sets channels bank to 0(allows directly input/output) */
	245	usp->usp_prev_cn_val[channel_offset - 1] = flags; /* saves written value */
	246
	247	return 0;
	248	}
	249
71b5f4f1	250	static int unioxx5_detach(struct comedi_device * dev)
110526ed KD	251	{
110526ed KD	252	int i;
34c43922	253	struct comedi_subdevice *subdev;
33a4640f	254	struct unioxx5_subd_priv *usp;
110526ed KD	255
	256	for (i = 0; i < dev->n_subdevices; i++) {
	257	subdev = &dev->subdevices[i];
	258	usp = subdev->private;
	259	release_region(usp->usp_iobase, UNIOXX5_SIZE);
	260	kfree(subdev->private);
	261	}
	262
	263	return 0;
	264	}
	265
	266	/* initializing subdevice with given address */
34c43922	267	static int __unioxx5_subdev_init(struct comedi_subdevice * subdev, int subdev_iobase,
110526ed KD	268	int minor)
110526ed KD	269	{
33a4640f	270	struct unioxx5_subd_priv *usp;
110526ed KD	271	int i, to, ndef_flag = 0;
	272
	273	if (!request_region(subdev_iobase, UNIOXX5_SIZE, DRIVER_NAME)) {
	274	printk(KERN_ERR "comedi%d: I/O port conflict\n", minor);
	275	return -EIO;
	276	}
	277
33a4640f	278	if ((usp = (struct unioxx5_subd_priv ) kzalloc(sizeof(usp),
110526ed KD	279	GFP_KERNEL)) == NULL) {
	280	printk(KERN_ERR "comedi%d: erorr! --> out of memory!\n", minor);
	281	return -1;
	282	}
	283
	284	usp->usp_iobase = subdev_iobase;
	285	printk("comedi%d: \|", minor);
	286
	287	/* defining modules types */
	288	for (i = 0; i < 12; i++) {
	289	to = 10000;
	290
	291	__unioxx5_analog_config(usp, i * 2);
	292	outb(i + 1, subdev_iobase + 5); /* sends channel number to card */
	293	outb('H', subdev_iobase + 6); /* requests EEPROM world */
	294	while (!(inb(subdev_iobase + 0) & TxBE)) ; /* waits while writting will be allowed */
	295	outb(0, subdev_iobase + 6);
	296
	297	/* waits while reading of two bytes will be allowed */
	298	while (!(inb(subdev_iobase + 0) & Rx2CA)) {
	299	if (--to <= 0) {
	300	ndef_flag = 1;
	301	break;
	302	}
	303	}
	304
	305	if (ndef_flag) {
	306	usp->usp_module_type[i] = 0;
	307	ndef_flag = 0;
	308	} else
	309	usp->usp_module_type[i] = inb(subdev_iobase + 6);
	310
	311	printk(" [%d] 0x%02x \|", i, usp->usp_module_type[i]);
	312	comedi_udelay(1);
	313	}
	314
	315	printk("\n");
	316
	317	/* initial subdevice for digital or analog i/o */
	318	subdev->type = COMEDI_SUBD_DIO;
	319	subdev->private = usp;
	320	subdev->subdev_flags = SDF_READABLE \| SDF_WRITABLE;
	321	subdev->n_chan = UNIOXX5_NUM_OF_CHANS;
	322	subdev->maxdata = 0xFFF;
	323	subdev->range_table = &range_digital;
	324	subdev->insn_read = unioxx5_subdev_read;
	325	subdev->insn_write = unioxx5_subdev_write;
	326	subdev->insn_config = unioxx5_insn_config; /* for digital modules only!!! */
	327
	328	printk("subdevice configured\n");
	329
	330	return 0;
	331	}
	332
33a4640f	333	static int __unioxx5_digital_write(struct unioxx5_subd_priv * usp, unsigned int * data,
110526ed KD	334	int channel, int minor)
	335	{
	336	int channel_offset, val;
	337	int mask = 1 << (channel & 0x07);
	338
	339	if ((channel_offset = __unioxx5_define_chan_offset(channel)) < 0) {
	340	printk(KERN_ERR
	341	"comedi%d: undefined channel %d. channel range is 0 .. 23\n",
	342	minor, channel);
	343	return 0;
	344	}
	345
	346	val = usp->usp_prev_wr_val[channel_offset - 1]; /* getting previous written value */
	347
	348	if (*data)
	349	val \|= mask;
	350	else
	351	val &= ~mask;
	352
	353	outb(val, usp->usp_iobase + channel_offset);
	354	usp->usp_prev_wr_val[channel_offset - 1] = val; /* saving new written value */
	355
	356	return 1;
	357	}
	358
	359	/* function for digital reading */
33a4640f	360	static int __unioxx5_digital_read(struct unioxx5_subd_priv * usp, unsigned int * data,
110526ed KD	361	int channel, int minor)
	362	{
	363	int channel_offset, mask = 1 << (channel & 0x07);
	364
	365	if ((channel_offset = __unioxx5_define_chan_offset(channel)) < 0) {
	366	printk(KERN_ERR
	367	"comedi%d: undefined channel %d. channel range is 0 .. 23\n",
	368	minor, channel);
	369	return 0;
	370	}
	371
	372	*data = inb(usp->usp_iobase + channel_offset);
	373	*data &= mask;
	374
	375	if (channel_offset > 1)
	376	channel -= 2 << channel_offset; /* this operation is created for correct readed value to 0 or 1 */
	377
	378	*data >>= channel;
	379	return 1;
	380	}
	381
	382	#if 0 /* not used? */
33a4640f	383	static void __unioxx5_digital_config(struct unioxx5_subd_priv * usp, int mode)
110526ed KD	384	{
	385	int i, mask;
	386
	387	mask = (mode == ALL_2_OUTPUT) ? 0xFF : 0x00;
	388	printk("COMEDI: mode = %d\n", mask);
	389
	390	outb(1, usp->usp_iobase + 0);
	391
	392	for (i = 0; i < 3; i++)
	393	outb(mask, usp->usp_iobase + i);
	394
	395	outb(0, usp->usp_iobase + 0);
	396	}
	397	#endif
	398
33a4640f	399	static int __unioxx5_analog_write(struct unioxx5_subd_priv * usp, unsigned int * data,
110526ed KD	400	int channel, int minor)
	401	{
	402	int module, i;
	403
	404	module = channel / 2; /* definig module number(0 .. 11) */
	405	i = (channel % 2) << 1; /* depends on type of channel (A or B) */
	406
	407	/* defining if given module can work on output */
	408	if (!(usp->usp_module_type[module] & MODULE_OUTPUT_MASK)) {
	409	printk(KERN_ERR
	410	"comedi%d: module in position %d with id 0x%0x is for input only!\n",
	411	minor, module, usp->usp_module_type[module]);
	412	return 0;
	413	}
	414
	415	__unioxx5_analog_config(usp, channel);
	416	/* saving minor byte */
	417	usp->usp_extra_data[module][i++] = (unsigned char)(*data & 0x00FF);
	418	/* saving major byte */
	419	usp->usp_extra_data[module][i] = (unsigned char)((*data & 0xFF00) >> 8);
	420
2696fb57	421	/* while(!((inb(usp->usp_iobase + 0)) & TxBE)); */
110526ed KD	422	outb(module + 1, usp->usp_iobase + 5); /* sending module number to card(1 .. 12) */
	423	outb('W', usp->usp_iobase + 6); /* sends (W)rite command to module */
	424
	425	/* sending for bytes to module(one byte per cycle iteration) */
	426	for (i = 0; i < 4; i++) {
	427	while (!((inb(usp->usp_iobase + 0)) & TxBE)) ; /* waits while writting will be allowed */
	428	outb(usp->usp_extra_data[module][i], usp->usp_iobase + 6);
	429	}
	430
	431	return 1;
	432	}
	433
33a4640f	434	static int __unioxx5_analog_read(struct unioxx5_subd_priv * usp, unsigned int * data,
110526ed KD	435	int channel, int minor)
	436	{
	437	int module_no, read_ch;
	438	char control;
	439
	440	module_no = channel / 2;
	441	read_ch = channel % 2; /* depend on type of channel (A or B) */
	442
	443	/* defining if given module can work on input */
	444	if (usp->usp_module_type[module_no] & MODULE_OUTPUT_MASK) {
	445	printk(KERN_ERR
	446	"comedi%d: module in position %d with id 0x%02x is for output only",
	447	minor, module_no, usp->usp_module_type[module_no]);
	448	return 0;
	449	}
	450
	451	__unioxx5_analog_config(usp, channel);
	452	outb(module_no + 1, usp->usp_iobase + 5); /* sends module number to card(1 .. 12) */
	453	outb('V', usp->usp_iobase + 6); /* sends to module (V)erify command */
	454	control = inb(usp->usp_iobase); /* get control register byte */
	455
	456	/* waits while reading four bytes will be allowed */
	457	while (!((control = inb(usp->usp_iobase + 0)) & Rx4CA)) ;
	458
	459	/* if four bytes readding error occurs - return 0(false) */
	460	if ((control & Rx4CA_ERR_MASK)) {
	461	printk("COMEDI: 4 bytes error\n");
	462	return 0;
	463	}
	464
	465	if (read_ch)
	466	data = inw(usp->usp_iobase + 6); / channel B */
	467	else
	468	data = inw(usp->usp_iobase + 4); / channel A */
	469
	470	return 1;
	471	}
	472
	473	/* configure channels for analog i/o (even to output, odd to input) */
33a4640f	474	static void __unioxx5_analog_config(struct unioxx5_subd_priv * usp, int channel)
110526ed KD	475	{
	476	int chan_a, chan_b, conf, channel_offset;
	477
	478	channel_offset = __unioxx5_define_chan_offset(channel);
	479	conf = usp->usp_prev_cn_val[channel_offset - 1];
	480	chan_a = chan_b = 1;
	481
	482	/* setting channel A and channel B mask */
	483	if (channel % 2 == 0) {
	484	chan_a <<= channel & 0x07;
	485	chan_b <<= (channel + 1) & 0x07;
	486	} else {
	487	chan_a <<= (channel - 1) & 0x07;
	488	chan_b <<= channel & 0x07;
	489	}
	490
	491	conf \|= chan_a; /* even channel ot output */
	492	conf &= ~chan_b; /* odd channel to input */
	493
	494	outb(1, usp->usp_iobase + 0);
	495	outb(conf, usp->usp_iobase + channel_offset);
	496	outb(0, usp->usp_iobase + 0);
	497
	498	usp->usp_prev_cn_val[channel_offset - 1] = conf;
	499	}
	500
	501	/* *\
	502	* this function defines if the given channel number *
	503	* enters in default numeric interspace(from 0 to 23) *
	504	* and it returns address offset for usage needed *
	505	* channel. *
	506	\* */
	507
	508	static int __unioxx5_define_chan_offset(int chan_num)
	509	{
	510
	511	if (chan_num < 0 \|\| chan_num > 23)
	512	return -1;
	513
	514	return (chan_num >> 3) + 1;
	515	}