/*
- comedi/drivers/comedi_bond.c
- A Comedi driver to 'bond' or merge multiple drivers and devices as one.
-
- COMEDI - Linux Control and Measurement Device Interface
- Copyright (C) 2000 David A. Schleef <ds@schleef.org>
- Copyright (C) 2005 Calin A. Culianu <calin@ajvar.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.
-*/
+ * comedi_bond.c
+ * A Comedi driver to 'bond' or merge multiple drivers and devices as one.
+ *
+ * COMEDI - Linux Control and Measurement Device Interface
+ * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
+ * Copyright (C) 2005 Calin A. Culianu <calin@ajvar.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.
+ */
+
/*
-Driver: comedi_bond
-Description: A driver to 'bond' (merge) multiple subdevices from multiple
- devices together as one.
-Devices:
-Author: ds
-Updated: Mon, 10 Oct 00:18:25 -0500
-Status: works
-
-This driver allows you to 'bond' (merge) multiple comedi subdevices
-(coming from possibly difference boards and/or drivers) together. For
-example, if you had a board with 2 different DIO subdevices, and
-another with 1 DIO subdevice, you could 'bond' them with this driver
-so that they look like one big fat DIO subdevice. This makes writing
-applications slightly easier as you don't have to worry about managing
-different subdevices in the application -- you just worry about
-indexing one linear array of channel id's.
-
-Right now only DIO subdevices are supported as that's the personal itch
-I am scratching with this driver. If you want to add support for AI and AO
-subdevs, go right on ahead and do so!
-
-Commands aren't supported -- although it would be cool if they were.
-
-Configuration Options:
- List of comedi-minors to bond. All subdevices of the same type
- within each minor will be concatenated together in the order given here.
-*/
+ * Driver: comedi_bond
+ * Description: A driver to 'bond' (merge) multiple subdevices from multiple
+ * devices together as one.
+ * Devices:
+ * Author: ds
+ * Updated: Mon, 10 Oct 00:18:25 -0500
+ * Status: works
+ *
+ * This driver allows you to 'bond' (merge) multiple comedi subdevices
+ * (coming from possibly difference boards and/or drivers) together. For
+ * example, if you had a board with 2 different DIO subdevices, and
+ * another with 1 DIO subdevice, you could 'bond' them with this driver
+ * so that they look like one big fat DIO subdevice. This makes writing
+ * applications slightly easier as you don't have to worry about managing
+ * different subdevices in the application -- you just worry about
+ * indexing one linear array of channel id's.
+ *
+ * Right now only DIO subdevices are supported as that's the personal itch
+ * I am scratching with this driver. If you want to add support for AI and AO
+ * subdevs, go right on ahead and do so!
+ *
+ * Commands aren't supported -- although it would be cool if they were.
+ *
+ * Configuration Options:
+ * List of comedi-minors to bond. All subdevices of the same type
+ * within each minor will be concatenated together in the order given here.
+ */
#include <linux/module.h>
#include <linux/string.h>
unsigned subdev_type;
unsigned nchans;
unsigned chanid_offset; /* The offset into our unified linear
- channel-id's of chanid 0 on this
- subdevice. */
+ * channel-id's of chanid 0 on this
+ * subdevice. */
};
-/* this structure is for data unique to this hardware driver. If
- several hardware drivers keep similar information in this structure,
- feel free to suggest moving the variable to the struct comedi_device struct. */
struct comedi_bond_private {
# define MAX_BOARD_NAME 256
char name[MAX_BOARD_NAME];
unsigned nchans;
};
-/* DIO devices are slightly special. Although it is possible to
- * implement the insn_read/insn_write interface, it is much more
- * useful to applications if you implement the insn_bits interface.
- * This allows packed reading/writing of the DIO channels. The
- * comedi core can convert between insn_bits and insn_read/write */
static int bonding_dio_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
if (devpriv->nchans < nchans)
nchans = devpriv->nchans;
- /* The insn data is a mask in data[0] and the new data
- * in data[1], each channel cooresponding to a bit. */
+ /*
+ * The insn data is a mask in data[0] and the new data
+ * in data[1], each channel cooresponding to a bit.
+ */
for (i = 0; num_done < nchans && i < devpriv->ndevs; ++i) {
struct BondedDevice *bdev = devpriv->devs[i];
- /* Grab the channel mask and data of only the bits corresponding
- to this subdevice.. need to shift them to zero position of
- course. */
+ /*
+ * Grab the channel mask and data of only the bits corresponding
+ * to this subdevice.. need to shift them to zero position of
+ * course.
+ */
/* Bits corresponding to this subdev. */
unsigned int subdevMask = ((1 << bdev->nchans) - 1);
unsigned int writeMask, dataBits;
return -EINVAL;
bdev = devpriv->chanIdDevMap[chan];
- /* The input or output configuration of each digital line is
+ /*
+ * The input or output configuration of each digital line is
* configured by a special insn_config instruction. chanspec
* contains the channel to be changed, and data[0] contains the
- * value COMEDI_INPUT or COMEDI_OUTPUT. */
+ * value COMEDI_INPUT or COMEDI_OUTPUT.
+ */
switch (data[0]) {
case INSN_CONFIG_DIO_OUTPUT:
io = COMEDI_OUTPUT; /* is this really necessary? */
ret = comedi_dio_config(bdev->dev, bdev->subdev, chan, io);
if (ret != 1)
return -EINVAL;
- /* Finally, save the new io_bits values since we didn't get
- an error above. */
+ /*
+ * Finally, save the new io_bits values since we didn't get an error
+ * above.
+ */
s->io_bits = io_bits;
return insn->n;
}
memset(devs_opened, 0, sizeof(devs_opened));
devpriv->name[0] = 0;
- /* Loop through all comedi devices specified on the command-line,
- building our device list */
+ /*
+ * Loop through all comedi devices specified on the command-line,
+ * building our device list.
+ */
for (i = 0; i < COMEDI_NDEVCONFOPTS && (!i || it->options[i]); ++i) {
char file[] = "/dev/comediXXXXXX";
int minor = it->options[i];
while (nchans--)
devpriv->chanIdDevMap[devpriv->nchans++] = bdev;
- /* Now put bdev pointer at end of devpriv->devs array
- * list.. */
+ /*
+ * Now put bdev pointer at end of devpriv->devs array
+ * list..
+ */
/* ergh.. ugly.. we need to realloc :( */
tmp = devpriv->ndevs * sizeof(bdev);
devpriv->devs[devpriv->ndevs - 1] = bdev;
{
- /** Append dev:subdev to devpriv->name */
+ /* Append dev:subdev to devpriv->name */
char buf[20];
int left =
MAX_BOARD_NAME - strlen(devpriv->name) - 1;
projects / firefly-linux-kernel-4.4.55.git / commitdiff