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* *
* 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_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
};
static int __init unioxx5_driver_init_module(void)
{
return comedi_driver_register(&unioxx5_driver);
}
static void __exit unioxx5_driver_cleanup_module(void)
{
comedi_driver_unregister(&unioxx5_driver);
}
module_init(unioxx5_driver_init_module);
module_exit(unioxx5_driver_cleanup_module);
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(KERN_INFO "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);
/* 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;
}
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(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_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;
}
/* 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)); */
/* 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_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;
}
/* 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;
}
MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
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