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Release 4.11 drivers/staging/comedi/range.c

/*
 * comedi/range.c
 * comedi routines for voltage ranges
 *
 * COMEDI - Linux Control and Measurement Device Interface
 * Copyright (C) 1997-8 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.
 */

#include <linux/uaccess.h>
#include "comedidev.h"
#include "comedi_internal.h"


const struct comedi_lrange range_bipolar10 = { 1, {BIP_RANGE(10)} };

EXPORT_SYMBOL_GPL(range_bipolar10);

const struct comedi_lrange range_bipolar5 = { 1, {BIP_RANGE(5)} };

EXPORT_SYMBOL_GPL(range_bipolar5);

const struct comedi_lrange range_bipolar2_5 = { 1, {BIP_RANGE(2.5)} };

EXPORT_SYMBOL_GPL(range_bipolar2_5);

const struct comedi_lrange range_unipolar10 = { 1, {UNI_RANGE(10)} };

EXPORT_SYMBOL_GPL(range_unipolar10);

const struct comedi_lrange range_unipolar5 = { 1, {UNI_RANGE(5)} };

EXPORT_SYMBOL_GPL(range_unipolar5);

const struct comedi_lrange range_unipolar2_5 = { 1, {UNI_RANGE(2.5)} };

EXPORT_SYMBOL_GPL(range_unipolar2_5);

const struct comedi_lrange range_0_20mA = { 1, {RANGE_mA(0, 20)} };

EXPORT_SYMBOL_GPL(range_0_20mA);

const struct comedi_lrange range_4_20mA = { 1, {RANGE_mA(4, 20)} };

EXPORT_SYMBOL_GPL(range_4_20mA);

const struct comedi_lrange range_0_32mA = { 1, {RANGE_mA(0, 32)} };

EXPORT_SYMBOL_GPL(range_0_32mA);

const struct comedi_lrange range_unknown = { 1, {{0, 1000000, UNIT_none} } };

EXPORT_SYMBOL_GPL(range_unknown);

/*
 * COMEDI_RANGEINFO ioctl
 * range information
 *
 * arg:
 *      pointer to comedi_rangeinfo structure
 *
 * reads:
 *      comedi_rangeinfo structure
 *
 * writes:
 *      array of comedi_krange structures to rangeinfo->range_ptr pointer
 */

int do_rangeinfo_ioctl(struct comedi_device *dev, struct comedi_rangeinfo __user *arg) { struct comedi_rangeinfo it; int subd, chan; const struct comedi_lrange *lr; struct comedi_subdevice *s; if (copy_from_user(&it, arg, sizeof(struct comedi_rangeinfo))) return -EFAULT; subd = (it.range_type >> 24) & 0xf; chan = (it.range_type >> 16) & 0xff; if (!dev->attached) return -EINVAL; if (subd >= dev->n_subdevices) return -EINVAL; s = &dev->subdevices[subd]; if (s->range_table) { lr = s->range_table; } else if (s->range_table_list) { if (chan >= s->n_chan) return -EINVAL; lr = s->range_table_list[chan]; } else { return -EINVAL; } if (RANGE_LENGTH(it.range_type) != lr->length) { dev_dbg(dev->class_dev, "wrong length %d should be %d (0x%08x)\n", RANGE_LENGTH(it.range_type), lr->length, it.range_type); return -EINVAL; } if (copy_to_user(it.range_ptr, lr->range, sizeof(struct comedi_krange) * lr->length)) return -EFAULT; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David A. Schleef22193.25%111.11%
H Hartley Sweeten83.38%222.22%
Bill Pemberton72.95%555.56%
Greg Kroah-Hartman10.42%111.11%
Total237100.00%9100.00%

/** * comedi_check_chanlist() - Validate each element in a chanlist. * @s: comedi_subdevice struct * @n: number of elements in the chanlist * @chanlist: the chanlist to validate * * Each element consists of a channel number, a range index, an analog * reference type and some flags, all packed into an unsigned int. * * This checks that the channel number and range index are supported by * the comedi subdevice. It does not check whether the analog reference * type and the flags are supported. Drivers that care should check those * themselves. * * Return: %0 if all @chanlist elements are valid (success), * %-EINVAL if one or more elements are invalid. */
int comedi_check_chanlist(struct comedi_subdevice *s, int n, unsigned int *chanlist) { struct comedi_device *dev = s->device; unsigned int chanspec; int chan, range_len, i; for (i = 0; i < n; i++) { chanspec = chanlist[i]; chan = CR_CHAN(chanspec); if (s->range_table) range_len = s->range_table->length; else if (s->range_table_list && chan < s->n_chan) range_len = s->range_table_list[chan]->length; else range_len = 0; if (chan >= s->n_chan || CR_RANGE(chanspec) >= range_len) { dev_warn(dev->class_dev, "bad chanlist[%d]=0x%08x chan=%d range length=%d\n", i, chanspec, chan, range_len); return -EINVAL; } } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
David A. Schleef9059.60%120.00%
H Hartley Sweeten4529.80%120.00%
Ian Abbott149.27%120.00%
Bill Pemberton10.66%120.00%
Greg Kroah-Hartman10.66%120.00%
Total151100.00%5100.00%

EXPORT_SYMBOL_GPL(comedi_check_chanlist);

Overall Contributors

PersonTokensPropCommitsCommitProp
David A. Schleef40965.54%14.76%
H Hartley Sweeten15024.04%628.57%
Mark Rankilor203.21%14.76%
Ian Abbott182.88%523.81%
Bill Pemberton142.24%523.81%
Greg Kroah-Hartman132.08%314.29%
Total624100.00%21100.00%
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