0a85b6f0ab
Lindent changes to comdi driver in staging tree. This patch is followed by the checkpatch.pl error fixes. Did not make them part of this patch as the patch size is already huge. Signed-off-by: Mithlesh Thukral <mithlesh@linsyssoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
161 lines
4.1 KiB
C
161 lines
4.1 KiB
C
/*
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module/range.c
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comedi routines for voltage ranges
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COMEDI - Linux Control and Measurement Device Interface
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Copyright (C) 1997-8 David A. Schleef <ds@schleef.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "comedidev.h"
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#include <asm/uaccess.h>
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const struct comedi_lrange range_bipolar10 = { 1, {BIP_RANGE(10)} };
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const struct comedi_lrange range_bipolar5 = { 1, {BIP_RANGE(5)} };
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const struct comedi_lrange range_bipolar2_5 = { 1, {BIP_RANGE(2.5)} };
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const struct comedi_lrange range_unipolar10 = { 1, {UNI_RANGE(10)} };
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const struct comedi_lrange range_unipolar5 = { 1, {UNI_RANGE(5)} };
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const struct comedi_lrange range_unknown = { 1, {{0, 1000000, UNIT_none}} };
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/*
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COMEDI_RANGEINFO
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range information ioctl
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arg:
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pointer to rangeinfo structure
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reads:
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range info structure
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writes:
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n struct comedi_krange structures to rangeinfo->range_ptr
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*/
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int do_rangeinfo_ioctl(struct comedi_device *dev, struct comedi_rangeinfo *arg)
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{
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struct comedi_rangeinfo it;
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int subd, chan;
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const struct comedi_lrange *lr;
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struct comedi_subdevice *s;
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if (copy_from_user(&it, arg, sizeof(struct comedi_rangeinfo)))
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return -EFAULT;
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subd = (it.range_type >> 24) & 0xf;
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chan = (it.range_type >> 16) & 0xff;
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if (!dev->attached)
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return -EINVAL;
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if (subd >= dev->n_subdevices)
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return -EINVAL;
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s = dev->subdevices + subd;
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if (s->range_table) {
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lr = s->range_table;
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} else if (s->range_table_list) {
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if (chan >= s->n_chan)
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return -EINVAL;
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lr = s->range_table_list[chan];
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} else {
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return -EINVAL;
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}
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if (RANGE_LENGTH(it.range_type) != lr->length) {
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DPRINTK("wrong length %d should be %d (0x%08x)\n",
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RANGE_LENGTH(it.range_type), lr->length, it.range_type);
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return -EINVAL;
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}
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if (copy_to_user(it.range_ptr, lr->range,
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sizeof(struct comedi_krange) * lr->length))
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return -EFAULT;
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return 0;
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}
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static int aref_invalid(struct comedi_subdevice *s, unsigned int chanspec)
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{
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unsigned int aref;
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/* disable reporting invalid arefs... maybe someday */
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return 0;
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aref = CR_AREF(chanspec);
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switch (aref) {
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case AREF_DIFF:
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if (s->subdev_flags & SDF_DIFF)
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return 0;
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break;
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case AREF_COMMON:
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if (s->subdev_flags & SDF_COMMON)
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return 0;
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break;
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case AREF_GROUND:
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if (s->subdev_flags & SDF_GROUND)
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return 0;
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break;
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case AREF_OTHER:
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if (s->subdev_flags & SDF_OTHER)
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return 0;
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break;
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default:
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break;
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}
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DPRINTK("subdevice does not support aref %i", aref);
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return 1;
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}
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/*
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This function checks each element in a channel/gain list to make
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make sure it is valid.
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*/
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int check_chanlist(struct comedi_subdevice *s, int n, unsigned int *chanlist)
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{
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int i;
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int chan;
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if (s->range_table) {
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for (i = 0; i < n; i++)
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if (CR_CHAN(chanlist[i]) >= s->n_chan ||
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CR_RANGE(chanlist[i]) >= s->range_table->length
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|| aref_invalid(s, chanlist[i])) {
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printk
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("bad chanlist[%d]=0x%08x n_chan=%d range length=%d\n",
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i, chanlist[i], s->n_chan,
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s->range_table->length);
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#if 0
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for (i = 0; i < n; i++)
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printk("[%d]=0x%08x\n", i, chanlist[i]);
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#endif
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return -EINVAL;
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}
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} else if (s->range_table_list) {
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for (i = 0; i < n; i++) {
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chan = CR_CHAN(chanlist[i]);
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if (chan >= s->n_chan ||
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CR_RANGE(chanlist[i]) >=
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s->range_table_list[chan]->length
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|| aref_invalid(s, chanlist[i])) {
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printk("bad chanlist[%d]=0x%08x\n", i,
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chanlist[i]);
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return -EINVAL;
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}
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}
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} else {
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printk("comedi: (bug) no range type list!\n");
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return -EINVAL;
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}
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return 0;
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}
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