2008-11-04 21:29:31 -07:00
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/*
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comedi/comedi_fops.c
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comedi kernel module
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COMEDI - Linux Control and Measurement Device Interface
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Copyright (C) 1997-2000 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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#undef DEBUG
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#include "comedi_compat32.h"
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/fcntl.h>
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#include <linux/delay.h>
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#include <linux/ioport.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/kmod.h>
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#include <linux/poll.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/vmalloc.h>
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#include <linux/fs.h>
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#include "comedidev.h"
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#include <linux/cdev.h>
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2009-04-14 09:21:41 -06:00
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#include <linux/stat.h>
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2008-11-04 21:29:31 -07:00
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2008-11-13 18:05:58 -07:00
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#include <linux/io.h>
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#include <linux/uaccess.h>
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2008-11-04 21:29:31 -07:00
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2012-06-19 03:17:44 -06:00
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#include "comedi_internal.h"
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2008-11-04 21:29:31 -07:00
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#ifdef CONFIG_COMEDI_DEBUG
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int comedi_debug;
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2010-05-01 13:02:23 -06:00
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EXPORT_SYMBOL(comedi_debug);
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2012-04-13 07:12:53 -06:00
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module_param(comedi_debug, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(comedi_debug,
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"enable comedi core and driver debugging if non-zero (default 0)"
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);
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2008-11-04 21:29:31 -07:00
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#endif
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2010-05-03 17:32:28 -06:00
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static int comedi_num_legacy_minors;
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2012-04-13 07:12:53 -06:00
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module_param(comedi_num_legacy_minors, int, S_IRUGO);
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MODULE_PARM_DESC(comedi_num_legacy_minors,
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"number of comedi minor devices to reserve for non-auto-configured devices (default 0)"
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);
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2012-04-13 07:12:54 -06:00
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unsigned int comedi_default_buf_size_kb = CONFIG_COMEDI_DEFAULT_BUF_SIZE_KB;
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2012-04-13 07:12:53 -06:00
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module_param(comedi_default_buf_size_kb, uint, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(comedi_default_buf_size_kb,
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"default asynchronous buffer size in KiB (default "
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2012-04-13 07:12:54 -06:00
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__MODULE_STRING(CONFIG_COMEDI_DEFAULT_BUF_SIZE_KB) ")");
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2012-04-13 07:12:53 -06:00
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2012-04-13 07:12:54 -06:00
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unsigned int comedi_default_buf_maxsize_kb
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= CONFIG_COMEDI_DEFAULT_BUF_MAXSIZE_KB;
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2012-04-13 07:12:53 -06:00
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module_param(comedi_default_buf_maxsize_kb, uint, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(comedi_default_buf_maxsize_kb,
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"default maximum size of asynchronous buffer in KiB (default "
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2012-04-13 07:12:54 -06:00
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__MODULE_STRING(CONFIG_COMEDI_DEFAULT_BUF_MAXSIZE_KB) ")");
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2008-12-08 16:30:13 -07:00
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2012-12-19 15:38:02 -07:00
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struct comedi_file_info {
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2012-12-19 15:36:42 -07:00
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struct comedi_device *device;
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struct comedi_subdevice *read_subdevice;
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struct comedi_subdevice *write_subdevice;
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struct device *hardware_device;
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};
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2008-11-04 21:29:31 -07:00
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static DEFINE_SPINLOCK(comedi_file_info_table_lock);
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2012-12-19 15:38:02 -07:00
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static struct comedi_file_info *comedi_file_info_table[COMEDI_NUM_MINORS];
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2008-11-13 18:05:58 -07:00
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2012-12-19 15:38:30 -07:00
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static struct comedi_file_info *comedi_file_info_from_minor(unsigned minor)
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2012-12-19 15:36:00 -07:00
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{
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2012-12-19 15:38:02 -07:00
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struct comedi_file_info *info;
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2012-12-19 15:36:00 -07:00
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BUG_ON(minor >= COMEDI_NUM_MINORS);
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spin_lock(&comedi_file_info_table_lock);
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info = comedi_file_info_table[minor];
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spin_unlock(&comedi_file_info_table_lock);
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return info;
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}
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2013-01-08 06:27:48 -07:00
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static struct comedi_device *
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comedi_dev_from_file_info(struct comedi_file_info *info)
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2012-12-19 15:34:40 -07:00
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{
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return info ? info->device : NULL;
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}
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2013-01-08 06:27:48 -07:00
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struct comedi_device *comedi_dev_from_minor(unsigned minor)
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{
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return comedi_dev_from_file_info(comedi_file_info_from_minor(minor));
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}
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2012-12-19 15:34:40 -07:00
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EXPORT_SYMBOL_GPL(comedi_dev_from_minor);
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2012-12-19 15:33:29 -07:00
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static struct comedi_subdevice *
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2012-12-19 15:38:53 -07:00
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comedi_read_subdevice(const struct comedi_file_info *info)
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2012-12-19 15:33:29 -07:00
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{
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if (info->read_subdevice)
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return info->read_subdevice;
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2012-12-19 15:44:46 -07:00
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if (info->device)
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return info->device->read_subdev;
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return NULL;
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2012-12-19 15:33:29 -07:00
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}
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static struct comedi_subdevice *
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2012-12-19 15:38:53 -07:00
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comedi_write_subdevice(const struct comedi_file_info *info)
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2012-12-19 15:33:29 -07:00
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{
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if (info->write_subdevice)
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return info->write_subdevice;
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2012-12-19 15:44:46 -07:00
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if (info->device)
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return info->device->write_subdev;
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return NULL;
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2012-12-19 15:33:29 -07:00
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}
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2009-04-14 09:21:41 -06:00
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static int resize_async_buffer(struct comedi_device *dev,
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struct comedi_subdevice *s,
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2012-05-09 10:20:08 -06:00
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struct comedi_async *async, unsigned new_size)
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{
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int retval;
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if (new_size > async->max_bufsize)
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return -EPERM;
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if (s->busy) {
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DPRINTK("subdevice is busy, cannot resize buffer\n");
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return -EBUSY;
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}
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if (async->mmap_count) {
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DPRINTK("subdevice is mmapped, cannot resize buffer\n");
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return -EBUSY;
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}
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if (!async->prealloc_buf)
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return -EINVAL;
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/* make sure buffer is an integral number of pages
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* (we round up) */
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new_size = (new_size + PAGE_SIZE - 1) & PAGE_MASK;
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retval = comedi_buf_alloc(dev, s, new_size);
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if (retval < 0)
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return retval;
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if (s->buf_change) {
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retval = s->buf_change(dev, s, new_size);
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if (retval < 0)
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return retval;
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}
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DPRINTK("comedi%i subd %d buffer resized to %i bytes\n",
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2012-12-19 17:27:02 -07:00
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dev->minor, s->index, async->prealloc_bufsz);
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2012-05-09 10:20:08 -06:00
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return 0;
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}
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/* sysfs attribute files */
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static ssize_t show_max_read_buffer_kb(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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2012-12-19 15:38:02 -07:00
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struct comedi_file_info *info = dev_get_drvdata(dev);
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2012-12-19 15:38:53 -07:00
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struct comedi_subdevice *s = comedi_read_subdevice(info);
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2012-06-05 11:18:02 -06:00
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unsigned int size = 0;
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2012-05-09 10:20:08 -06:00
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mutex_lock(&info->device->mutex);
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2012-06-05 11:18:02 -06:00
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if (s && (s->subdev_flags & SDF_CMD_READ) && s->async)
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size = s->async->max_bufsize / 1024;
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2012-05-09 10:20:08 -06:00
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mutex_unlock(&info->device->mutex);
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2012-06-05 11:18:02 -06:00
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return snprintf(buf, PAGE_SIZE, "%i\n", size);
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2012-05-09 10:20:08 -06:00
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}
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static ssize_t store_max_read_buffer_kb(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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2012-12-19 15:38:02 -07:00
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struct comedi_file_info *info = dev_get_drvdata(dev);
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2012-12-19 15:38:53 -07:00
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struct comedi_subdevice *s = comedi_read_subdevice(info);
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2012-06-05 11:18:02 -06:00
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unsigned int size;
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int err;
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err = kstrtouint(buf, 10, &size);
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if (err)
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return err;
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if (size > (UINT_MAX / 1024))
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2012-05-09 10:20:08 -06:00
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return -EINVAL;
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2012-06-05 11:18:02 -06:00
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size *= 1024;
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2012-05-09 10:20:08 -06:00
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mutex_lock(&info->device->mutex);
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2012-06-05 11:18:02 -06:00
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if (s && (s->subdev_flags & SDF_CMD_READ) && s->async)
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s->async->max_bufsize = size;
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else
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err = -EINVAL;
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2012-05-09 10:20:08 -06:00
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mutex_unlock(&info->device->mutex);
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2012-06-05 11:18:02 -06:00
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return err ? err : count;
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2012-05-09 10:20:08 -06:00
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}
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static ssize_t show_read_buffer_kb(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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2012-12-19 15:38:02 -07:00
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struct comedi_file_info *info = dev_get_drvdata(dev);
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2012-12-19 15:38:53 -07:00
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struct comedi_subdevice *s = comedi_read_subdevice(info);
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2012-06-05 11:18:02 -06:00
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unsigned int size = 0;
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2012-05-09 10:20:08 -06:00
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mutex_lock(&info->device->mutex);
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2012-06-05 11:18:02 -06:00
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if (s && (s->subdev_flags & SDF_CMD_READ) && s->async)
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size = s->async->prealloc_bufsz / 1024;
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2012-05-09 10:20:08 -06:00
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mutex_unlock(&info->device->mutex);
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2012-06-05 11:18:02 -06:00
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return snprintf(buf, PAGE_SIZE, "%i\n", size);
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2012-05-09 10:20:08 -06:00
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}
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static ssize_t store_read_buffer_kb(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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2012-12-19 15:38:02 -07:00
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struct comedi_file_info *info = dev_get_drvdata(dev);
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2012-12-19 15:38:53 -07:00
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struct comedi_subdevice *s = comedi_read_subdevice(info);
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2012-06-05 11:18:02 -06:00
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unsigned int size;
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int err;
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err = kstrtouint(buf, 10, &size);
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if (err)
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return err;
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if (size > (UINT_MAX / 1024))
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2012-05-09 10:20:08 -06:00
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return -EINVAL;
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2012-06-05 11:18:02 -06:00
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size *= 1024;
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2012-05-09 10:20:08 -06:00
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mutex_lock(&info->device->mutex);
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2012-06-05 11:18:02 -06:00
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if (s && (s->subdev_flags & SDF_CMD_READ) && s->async)
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err = resize_async_buffer(info->device, s, s->async, size);
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else
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err = -EINVAL;
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2012-05-09 10:20:08 -06:00
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mutex_unlock(&info->device->mutex);
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2012-06-05 11:18:02 -06:00
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return err ? err : count;
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2012-05-09 10:20:08 -06:00
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}
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2009-04-14 09:21:41 -06:00
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2012-05-09 10:20:08 -06:00
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static ssize_t show_max_write_buffer_kb(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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2012-12-19 15:38:02 -07:00
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struct comedi_file_info *info = dev_get_drvdata(dev);
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2012-12-19 15:38:53 -07:00
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struct comedi_subdevice *s = comedi_write_subdevice(info);
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2012-06-05 11:18:02 -06:00
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unsigned int size = 0;
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2012-05-09 10:20:08 -06:00
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mutex_lock(&info->device->mutex);
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2012-06-05 11:18:02 -06:00
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if (s && (s->subdev_flags & SDF_CMD_WRITE) && s->async)
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size = s->async->max_bufsize / 1024;
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2012-05-09 10:20:08 -06:00
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mutex_unlock(&info->device->mutex);
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2012-06-05 11:18:02 -06:00
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return snprintf(buf, PAGE_SIZE, "%i\n", size);
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2012-05-09 10:20:08 -06:00
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}
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static ssize_t store_max_write_buffer_kb(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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2012-12-19 15:38:02 -07:00
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struct comedi_file_info *info = dev_get_drvdata(dev);
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2012-12-19 15:38:53 -07:00
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struct comedi_subdevice *s = comedi_write_subdevice(info);
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2012-06-05 11:18:02 -06:00
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unsigned int size;
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int err;
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err = kstrtouint(buf, 10, &size);
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if (err)
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return err;
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if (size > (UINT_MAX / 1024))
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2012-05-09 10:20:08 -06:00
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return -EINVAL;
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2012-06-05 11:18:02 -06:00
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size *= 1024;
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2012-05-09 10:20:08 -06:00
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mutex_lock(&info->device->mutex);
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2012-06-05 11:18:02 -06:00
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if (s && (s->subdev_flags & SDF_CMD_WRITE) && s->async)
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s->async->max_bufsize = size;
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else
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err = -EINVAL;
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2012-05-09 10:20:08 -06:00
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mutex_unlock(&info->device->mutex);
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2012-06-05 11:18:02 -06:00
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return err ? err : count;
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2012-05-09 10:20:08 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t show_write_buffer_kb(struct device *dev,
|
|
|
|
struct device_attribute *attr, char *buf)
|
|
|
|
{
|
2012-12-19 15:38:02 -07:00
|
|
|
struct comedi_file_info *info = dev_get_drvdata(dev);
|
2012-12-19 15:38:53 -07:00
|
|
|
struct comedi_subdevice *s = comedi_write_subdevice(info);
|
2012-06-05 11:18:02 -06:00
|
|
|
unsigned int size = 0;
|
2012-05-09 10:20:08 -06:00
|
|
|
|
|
|
|
mutex_lock(&info->device->mutex);
|
2012-06-05 11:18:02 -06:00
|
|
|
if (s && (s->subdev_flags & SDF_CMD_WRITE) && s->async)
|
|
|
|
size = s->async->prealloc_bufsz / 1024;
|
2012-05-09 10:20:08 -06:00
|
|
|
mutex_unlock(&info->device->mutex);
|
|
|
|
|
2012-06-05 11:18:02 -06:00
|
|
|
return snprintf(buf, PAGE_SIZE, "%i\n", size);
|
2012-05-09 10:20:08 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static ssize_t store_write_buffer_kb(struct device *dev,
|
|
|
|
struct device_attribute *attr,
|
|
|
|
const char *buf, size_t count)
|
|
|
|
{
|
2012-12-19 15:38:02 -07:00
|
|
|
struct comedi_file_info *info = dev_get_drvdata(dev);
|
2012-12-19 15:38:53 -07:00
|
|
|
struct comedi_subdevice *s = comedi_write_subdevice(info);
|
2012-06-05 11:18:02 -06:00
|
|
|
unsigned int size;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = kstrtouint(buf, 10, &size);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
if (size > (UINT_MAX / 1024))
|
2012-05-09 10:20:08 -06:00
|
|
|
return -EINVAL;
|
2012-06-05 11:18:02 -06:00
|
|
|
size *= 1024;
|
2012-05-09 10:20:08 -06:00
|
|
|
|
|
|
|
mutex_lock(&info->device->mutex);
|
2012-06-05 11:18:02 -06:00
|
|
|
if (s && (s->subdev_flags & SDF_CMD_WRITE) && s->async)
|
|
|
|
err = resize_async_buffer(info->device, s, s->async, size);
|
|
|
|
else
|
|
|
|
err = -EINVAL;
|
2012-05-09 10:20:08 -06:00
|
|
|
mutex_unlock(&info->device->mutex);
|
|
|
|
|
2012-06-05 11:18:02 -06:00
|
|
|
return err ? err : count;
|
2012-05-09 10:20:08 -06:00
|
|
|
}
|
|
|
|
|
2012-05-10 19:05:28 -06:00
|
|
|
static struct device_attribute comedi_dev_attrs[] = {
|
|
|
|
__ATTR(max_read_buffer_kb, S_IRUGO | S_IWUSR,
|
|
|
|
show_max_read_buffer_kb, store_max_read_buffer_kb),
|
|
|
|
__ATTR(read_buffer_kb, S_IRUGO | S_IWUSR | S_IWGRP,
|
|
|
|
show_read_buffer_kb, store_read_buffer_kb),
|
|
|
|
__ATTR(max_write_buffer_kb, S_IRUGO | S_IWUSR,
|
|
|
|
show_max_write_buffer_kb, store_max_write_buffer_kb),
|
|
|
|
__ATTR(write_buffer_kb, S_IRUGO | S_IWUSR | S_IWGRP,
|
|
|
|
show_write_buffer_kb, store_write_buffer_kb),
|
|
|
|
__ATTR_NULL
|
2012-05-09 10:20:08 -06:00
|
|
|
};
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2012-12-19 15:31:57 -07:00
|
|
|
static void comedi_set_subdevice_runflags(struct comedi_subdevice *s,
|
|
|
|
unsigned mask, unsigned bits)
|
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&s->spin_lock, flags);
|
|
|
|
s->runflags &= ~mask;
|
|
|
|
s->runflags |= (bits & mask);
|
|
|
|
spin_unlock_irqrestore(&s->spin_lock, flags);
|
|
|
|
}
|
|
|
|
|
2012-12-19 15:43:40 -07:00
|
|
|
static unsigned comedi_get_subdevice_runflags(struct comedi_subdevice *s)
|
2012-12-19 15:42:26 -07:00
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
unsigned runflags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&s->spin_lock, flags);
|
|
|
|
runflags = s->runflags;
|
|
|
|
spin_unlock_irqrestore(&s->spin_lock, flags);
|
|
|
|
return runflags;
|
|
|
|
}
|
|
|
|
|
2012-12-19 15:42:47 -07:00
|
|
|
bool comedi_is_subdevice_running(struct comedi_subdevice *s)
|
|
|
|
{
|
|
|
|
unsigned runflags = comedi_get_subdevice_runflags(s);
|
|
|
|
|
|
|
|
return (runflags & SRF_RUNNING) ? true : false;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(comedi_is_subdevice_running);
|
|
|
|
|
2012-12-19 15:44:02 -07:00
|
|
|
static bool comedi_is_subdevice_in_error(struct comedi_subdevice *s)
|
|
|
|
{
|
|
|
|
unsigned runflags = comedi_get_subdevice_runflags(s);
|
|
|
|
|
|
|
|
return (runflags & SRF_ERROR) ? true : false;
|
|
|
|
}
|
|
|
|
|
2012-12-19 15:44:24 -07:00
|
|
|
static bool comedi_is_subdevice_idle(struct comedi_subdevice *s)
|
|
|
|
{
|
|
|
|
unsigned runflags = comedi_get_subdevice_runflags(s);
|
|
|
|
|
|
|
|
return (runflags & (SRF_ERROR | SRF_RUNNING)) ? false : true;
|
|
|
|
}
|
|
|
|
|
2012-12-19 15:31:57 -07:00
|
|
|
/*
|
|
|
|
This function restores a subdevice to an idle state.
|
|
|
|
*/
|
|
|
|
static void do_become_nonbusy(struct comedi_device *dev,
|
|
|
|
struct comedi_subdevice *s)
|
|
|
|
{
|
|
|
|
struct comedi_async *async = s->async;
|
|
|
|
|
|
|
|
comedi_set_subdevice_runflags(s, SRF_RUNNING, 0);
|
|
|
|
if (async) {
|
2013-01-09 13:27:07 -07:00
|
|
|
comedi_buf_reset(async);
|
2012-12-19 15:31:57 -07:00
|
|
|
async->inttrig = NULL;
|
|
|
|
kfree(async->cmd.chanlist);
|
|
|
|
async->cmd.chanlist = NULL;
|
|
|
|
} else {
|
|
|
|
dev_err(dev->class_dev,
|
|
|
|
"BUG: (?) do_become_nonbusy called with async=NULL\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
s->busy = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int do_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
|
|
|
|
{
|
|
|
|
int ret = 0;
|
|
|
|
|
2012-12-19 15:43:18 -07:00
|
|
|
if (comedi_is_subdevice_running(s) && s->cancel)
|
2012-12-19 15:31:57 -07:00
|
|
|
ret = s->cancel(dev, s);
|
|
|
|
|
|
|
|
do_become_nonbusy(dev, s);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int is_device_busy(struct comedi_device *dev)
|
|
|
|
{
|
|
|
|
struct comedi_subdevice *s;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (!dev->attached)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
for (i = 0; i < dev->n_subdevices; i++) {
|
|
|
|
s = &dev->subdevices[i];
|
|
|
|
if (s->busy)
|
|
|
|
return 1;
|
|
|
|
if (s->async && s->async->mmap_count)
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-11-04 21:29:31 -07:00
|
|
|
/*
|
|
|
|
COMEDI_DEVCONFIG
|
|
|
|
device config ioctl
|
|
|
|
|
|
|
|
arg:
|
|
|
|
pointer to devconfig structure
|
|
|
|
|
|
|
|
reads:
|
|
|
|
devconfig structure at arg
|
|
|
|
|
|
|
|
writes:
|
|
|
|
none
|
|
|
|
*/
|
2009-06-08 09:34:41 -06:00
|
|
|
static int do_devconfig_ioctl(struct comedi_device *dev,
|
2010-05-03 17:32:28 -06:00
|
|
|
struct comedi_devconfig __user *arg)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2009-03-16 20:06:20 -06:00
|
|
|
struct comedi_devconfig it;
|
2008-11-04 21:29:31 -07:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
|
|
return -EPERM;
|
|
|
|
|
|
|
|
if (arg == NULL) {
|
|
|
|
if (is_device_busy(dev))
|
|
|
|
return -EBUSY;
|
2008-11-13 18:05:58 -07:00
|
|
|
if (dev->attached) {
|
2008-11-04 21:29:31 -07:00
|
|
|
struct module *driver_module = dev->driver->module;
|
|
|
|
comedi_device_detach(dev);
|
|
|
|
module_put(driver_module);
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-12-19 15:42:02 -07:00
|
|
|
if (copy_from_user(&it, arg, sizeof(it)))
|
2008-11-04 21:29:31 -07:00
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
it.board_name[COMEDI_NAMELEN - 1] = 0;
|
|
|
|
|
2013-01-09 09:46:10 -07:00
|
|
|
if (it.options[COMEDI_DEVCONF_AUX_DATA_LENGTH]) {
|
|
|
|
dev_warn(dev->class_dev,
|
|
|
|
"comedi_config --init_data is deprecated\n");
|
|
|
|
return -EINVAL;
|
2008-11-04 21:29:31 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
ret = comedi_device_attach(dev, &it);
|
2008-11-13 18:05:58 -07:00
|
|
|
if (ret == 0) {
|
|
|
|
if (!try_module_get(dev->driver->module)) {
|
2008-11-04 21:29:31 -07:00
|
|
|
comedi_device_detach(dev);
|
2012-04-22 05:37:09 -06:00
|
|
|
ret = -ENOSYS;
|
2008-11-04 21:29:31 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
COMEDI_BUFCONFIG
|
|
|
|
buffer configuration ioctl
|
|
|
|
|
|
|
|
arg:
|
|
|
|
pointer to bufconfig structure
|
|
|
|
|
|
|
|
reads:
|
|
|
|
bufconfig at arg
|
|
|
|
|
|
|
|
writes:
|
|
|
|
modified bufconfig at arg
|
|
|
|
|
|
|
|
*/
|
2010-05-03 17:32:28 -06:00
|
|
|
static int do_bufconfig_ioctl(struct comedi_device *dev,
|
|
|
|
struct comedi_bufconfig __user *arg)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2009-03-16 20:06:37 -06:00
|
|
|
struct comedi_bufconfig bc;
|
2009-03-16 20:05:20 -06:00
|
|
|
struct comedi_async *async;
|
2009-03-16 20:05:14 -06:00
|
|
|
struct comedi_subdevice *s;
|
2009-04-14 09:21:41 -06:00
|
|
|
int retval = 0;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2012-12-19 15:42:02 -07:00
|
|
|
if (copy_from_user(&bc, arg, sizeof(bc)))
|
2008-11-04 21:29:31 -07:00
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
if (bc.subdevice >= dev->n_subdevices || bc.subdevice < 0)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2012-09-05 19:20:58 -06:00
|
|
|
s = &dev->subdevices[bc.subdevice];
|
2008-11-04 21:29:31 -07:00
|
|
|
async = s->async;
|
|
|
|
|
|
|
|
if (!async) {
|
|
|
|
DPRINTK("subdevice does not have async capability\n");
|
|
|
|
bc.size = 0;
|
|
|
|
bc.maximum_size = 0;
|
|
|
|
goto copyback;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (bc.maximum_size) {
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
|
|
return -EPERM;
|
|
|
|
|
|
|
|
async->max_bufsize = bc.maximum_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (bc.size) {
|
2009-04-14 09:21:41 -06:00
|
|
|
retval = resize_async_buffer(dev, s, async, bc.size);
|
|
|
|
if (retval < 0)
|
|
|
|
return retval;
|
2008-11-04 21:29:31 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
bc.size = async->prealloc_bufsz;
|
|
|
|
bc.maximum_size = async->max_bufsize;
|
|
|
|
|
2008-11-13 18:05:58 -07:00
|
|
|
copyback:
|
2012-12-19 15:42:02 -07:00
|
|
|
if (copy_to_user(arg, &bc, sizeof(bc)))
|
2008-11-04 21:29:31 -07:00
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
COMEDI_DEVINFO
|
|
|
|
device info ioctl
|
|
|
|
|
|
|
|
arg:
|
|
|
|
pointer to devinfo structure
|
|
|
|
|
|
|
|
reads:
|
|
|
|
none
|
|
|
|
|
|
|
|
writes:
|
|
|
|
devinfo structure
|
|
|
|
|
|
|
|
*/
|
2009-06-08 09:34:41 -06:00
|
|
|
static int do_devinfo_ioctl(struct comedi_device *dev,
|
2010-05-03 17:32:28 -06:00
|
|
|
struct comedi_devinfo __user *arg,
|
|
|
|
struct file *file)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2013-02-27 14:59:05 -07:00
|
|
|
const unsigned minor = iminor(file_inode(file));
|
2012-12-19 15:38:30 -07:00
|
|
|
struct comedi_file_info *info = comedi_file_info_from_minor(minor);
|
2012-12-19 15:39:18 -07:00
|
|
|
struct comedi_subdevice *s;
|
|
|
|
struct comedi_devinfo devinfo;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
memset(&devinfo, 0, sizeof(devinfo));
|
|
|
|
|
|
|
|
/* fill devinfo structure */
|
|
|
|
devinfo.version_code = COMEDI_VERSION_CODE;
|
|
|
|
devinfo.n_subdevs = dev->n_subdevices;
|
2011-06-26 02:56:22 -06:00
|
|
|
strlcpy(devinfo.driver_name, dev->driver->driver_name, COMEDI_NAMELEN);
|
|
|
|
strlcpy(devinfo.board_name, dev->board_name, COMEDI_NAMELEN);
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2012-12-19 15:39:18 -07:00
|
|
|
s = comedi_read_subdevice(info);
|
|
|
|
if (s)
|
2012-12-19 17:27:02 -07:00
|
|
|
devinfo.read_subdevice = s->index;
|
2008-11-13 18:05:58 -07:00
|
|
|
else
|
2008-11-04 21:29:31 -07:00
|
|
|
devinfo.read_subdevice = -1;
|
2008-11-13 18:05:58 -07:00
|
|
|
|
2012-12-19 15:39:18 -07:00
|
|
|
s = comedi_write_subdevice(info);
|
|
|
|
if (s)
|
2012-12-19 17:27:02 -07:00
|
|
|
devinfo.write_subdevice = s->index;
|
2008-11-13 18:05:58 -07:00
|
|
|
else
|
2008-11-04 21:29:31 -07:00
|
|
|
devinfo.write_subdevice = -1;
|
|
|
|
|
2012-12-19 15:42:02 -07:00
|
|
|
if (copy_to_user(arg, &devinfo, sizeof(devinfo)))
|
2008-11-04 21:29:31 -07:00
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
COMEDI_SUBDINFO
|
|
|
|
subdevice info ioctl
|
|
|
|
|
|
|
|
arg:
|
|
|
|
pointer to array of subdevice info structures
|
|
|
|
|
|
|
|
reads:
|
|
|
|
none
|
|
|
|
|
|
|
|
writes:
|
|
|
|
array of subdevice info structures at arg
|
|
|
|
|
|
|
|
*/
|
2009-06-08 09:34:41 -06:00
|
|
|
static int do_subdinfo_ioctl(struct comedi_device *dev,
|
2010-05-03 17:32:28 -06:00
|
|
|
struct comedi_subdinfo __user *arg, void *file)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
|
|
|
int ret, i;
|
2009-03-16 20:06:09 -06:00
|
|
|
struct comedi_subdinfo *tmp, *us;
|
2009-03-16 20:05:14 -06:00
|
|
|
struct comedi_subdevice *s;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2012-12-19 15:42:02 -07:00
|
|
|
tmp = kcalloc(dev->n_subdevices, sizeof(*tmp), GFP_KERNEL);
|
2008-11-04 21:29:31 -07:00
|
|
|
if (!tmp)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
/* fill subdinfo structs */
|
|
|
|
for (i = 0; i < dev->n_subdevices; i++) {
|
2012-09-05 19:20:58 -06:00
|
|
|
s = &dev->subdevices[i];
|
2008-11-04 21:29:31 -07:00
|
|
|
us = tmp + i;
|
|
|
|
|
|
|
|
us->type = s->type;
|
|
|
|
us->n_chan = s->n_chan;
|
|
|
|
us->subd_flags = s->subdev_flags;
|
2012-12-19 15:43:18 -07:00
|
|
|
if (comedi_is_subdevice_running(s))
|
2008-11-04 21:29:31 -07:00
|
|
|
us->subd_flags |= SDF_RUNNING;
|
|
|
|
#define TIMER_nanosec 5 /* backwards compatibility */
|
|
|
|
us->timer_type = TIMER_nanosec;
|
|
|
|
us->len_chanlist = s->len_chanlist;
|
|
|
|
us->maxdata = s->maxdata;
|
|
|
|
if (s->range_table) {
|
|
|
|
us->range_type =
|
2008-11-13 18:05:58 -07:00
|
|
|
(i << 24) | (0 << 16) | (s->range_table->length);
|
2008-11-04 21:29:31 -07:00
|
|
|
} else {
|
|
|
|
us->range_type = 0; /* XXX */
|
|
|
|
}
|
|
|
|
us->flags = s->flags;
|
|
|
|
|
|
|
|
if (s->busy)
|
|
|
|
us->subd_flags |= SDF_BUSY;
|
|
|
|
if (s->busy == file)
|
|
|
|
us->subd_flags |= SDF_BUSY_OWNER;
|
|
|
|
if (s->lock)
|
|
|
|
us->subd_flags |= SDF_LOCKED;
|
|
|
|
if (s->lock == file)
|
|
|
|
us->subd_flags |= SDF_LOCK_OWNER;
|
|
|
|
if (!s->maxdata && s->maxdata_list)
|
|
|
|
us->subd_flags |= SDF_MAXDATA;
|
|
|
|
if (s->flaglist)
|
|
|
|
us->subd_flags |= SDF_FLAGS;
|
|
|
|
if (s->range_table_list)
|
|
|
|
us->subd_flags |= SDF_RANGETYPE;
|
|
|
|
if (s->do_cmd)
|
|
|
|
us->subd_flags |= SDF_CMD;
|
|
|
|
|
|
|
|
if (s->insn_bits != &insn_inval)
|
|
|
|
us->insn_bits_support = COMEDI_SUPPORTED;
|
|
|
|
else
|
|
|
|
us->insn_bits_support = COMEDI_UNSUPPORTED;
|
|
|
|
|
|
|
|
us->settling_time_0 = s->settling_time_0;
|
|
|
|
}
|
|
|
|
|
2012-12-19 15:42:02 -07:00
|
|
|
ret = copy_to_user(arg, tmp, dev->n_subdevices * sizeof(*tmp));
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
kfree(tmp);
|
|
|
|
|
|
|
|
return ret ? -EFAULT : 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
COMEDI_CHANINFO
|
|
|
|
subdevice info ioctl
|
|
|
|
|
|
|
|
arg:
|
|
|
|
pointer to chaninfo structure
|
|
|
|
|
|
|
|
reads:
|
|
|
|
chaninfo structure at arg
|
|
|
|
|
|
|
|
writes:
|
|
|
|
arrays at elements of chaninfo structure
|
|
|
|
|
|
|
|
*/
|
2009-06-08 09:34:41 -06:00
|
|
|
static int do_chaninfo_ioctl(struct comedi_device *dev,
|
2010-05-03 17:32:28 -06:00
|
|
|
struct comedi_chaninfo __user *arg)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2009-03-16 20:05:14 -06:00
|
|
|
struct comedi_subdevice *s;
|
2009-03-16 20:06:04 -06:00
|
|
|
struct comedi_chaninfo it;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2012-12-19 15:42:02 -07:00
|
|
|
if (copy_from_user(&it, arg, sizeof(it)))
|
2008-11-04 21:29:31 -07:00
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
if (it.subdev >= dev->n_subdevices)
|
|
|
|
return -EINVAL;
|
2012-09-05 19:20:58 -06:00
|
|
|
s = &dev->subdevices[it.subdev];
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
if (it.maxdata_list) {
|
|
|
|
if (s->maxdata || !s->maxdata_list)
|
|
|
|
return -EINVAL;
|
|
|
|
if (copy_to_user(it.maxdata_list, s->maxdata_list,
|
2009-03-16 20:05:02 -06:00
|
|
|
s->n_chan * sizeof(unsigned int)))
|
2008-11-04 21:29:31 -07:00
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (it.flaglist) {
|
|
|
|
if (!s->flaglist)
|
|
|
|
return -EINVAL;
|
|
|
|
if (copy_to_user(it.flaglist, s->flaglist,
|
2008-11-13 18:05:58 -07:00
|
|
|
s->n_chan * sizeof(unsigned int)))
|
2008-11-04 21:29:31 -07:00
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (it.rangelist) {
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (!s->range_table_list)
|
|
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < s->n_chan; i++) {
|
|
|
|
int x;
|
|
|
|
|
|
|
|
x = (dev->minor << 28) | (it.subdev << 24) | (i << 16) |
|
2008-11-13 18:05:58 -07:00
|
|
|
(s->range_table_list[i]->length);
|
2010-09-05 12:32:33 -06:00
|
|
|
if (put_user(x, it.rangelist + i))
|
|
|
|
return -EFAULT;
|
2008-11-04 21:29:31 -07:00
|
|
|
}
|
2008-11-13 18:05:58 -07:00
|
|
|
#if 0
|
|
|
|
if (copy_to_user(it.rangelist, s->range_type_list,
|
2009-06-08 09:34:41 -06:00
|
|
|
s->n_chan * sizeof(unsigned int)))
|
2008-11-13 18:05:58 -07:00
|
|
|
return -EFAULT;
|
|
|
|
#endif
|
2008-11-04 21:29:31 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
COMEDI_BUFINFO
|
|
|
|
buffer information ioctl
|
|
|
|
|
|
|
|
arg:
|
|
|
|
pointer to bufinfo structure
|
|
|
|
|
|
|
|
reads:
|
|
|
|
bufinfo at arg
|
|
|
|
|
|
|
|
writes:
|
|
|
|
modified bufinfo at arg
|
|
|
|
|
|
|
|
*/
|
2010-05-03 17:32:28 -06:00
|
|
|
static int do_bufinfo_ioctl(struct comedi_device *dev,
|
2010-05-19 11:09:50 -06:00
|
|
|
struct comedi_bufinfo __user *arg, void *file)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2009-03-16 20:06:42 -06:00
|
|
|
struct comedi_bufinfo bi;
|
2009-03-16 20:05:14 -06:00
|
|
|
struct comedi_subdevice *s;
|
2009-03-16 20:05:20 -06:00
|
|
|
struct comedi_async *async;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2012-12-19 15:42:02 -07:00
|
|
|
if (copy_from_user(&bi, arg, sizeof(bi)))
|
2008-11-04 21:29:31 -07:00
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
if (bi.subdevice >= dev->n_subdevices || bi.subdevice < 0)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2012-09-05 19:20:58 -06:00
|
|
|
s = &dev->subdevices[bi.subdevice];
|
2010-05-19 11:09:50 -06:00
|
|
|
|
|
|
|
if (s->lock && s->lock != file)
|
|
|
|
return -EACCES;
|
|
|
|
|
2008-11-04 21:29:31 -07:00
|
|
|
async = s->async;
|
|
|
|
|
|
|
|
if (!async) {
|
|
|
|
DPRINTK("subdevice does not have async capability\n");
|
|
|
|
bi.buf_write_ptr = 0;
|
|
|
|
bi.buf_read_ptr = 0;
|
|
|
|
bi.buf_write_count = 0;
|
|
|
|
bi.buf_read_count = 0;
|
2010-05-19 11:09:49 -06:00
|
|
|
bi.bytes_read = 0;
|
|
|
|
bi.bytes_written = 0;
|
2008-11-04 21:29:31 -07:00
|
|
|
goto copyback;
|
|
|
|
}
|
2010-05-19 11:09:50 -06:00
|
|
|
if (!s->busy) {
|
|
|
|
bi.bytes_read = 0;
|
|
|
|
bi.bytes_written = 0;
|
|
|
|
goto copyback_position;
|
|
|
|
}
|
|
|
|
if (s->busy != file)
|
|
|
|
return -EACCES;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
if (bi.bytes_read && (s->subdev_flags & SDF_CMD_READ)) {
|
|
|
|
bi.bytes_read = comedi_buf_read_alloc(async, bi.bytes_read);
|
|
|
|
comedi_buf_read_free(async, bi.bytes_read);
|
|
|
|
|
2012-12-19 15:44:24 -07:00
|
|
|
if (comedi_is_subdevice_idle(s) &&
|
|
|
|
async->buf_write_count == async->buf_read_count) {
|
2008-11-04 21:29:31 -07:00
|
|
|
do_become_nonbusy(dev, s);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (bi.bytes_written && (s->subdev_flags & SDF_CMD_WRITE)) {
|
|
|
|
bi.bytes_written =
|
2008-11-13 18:05:58 -07:00
|
|
|
comedi_buf_write_alloc(async, bi.bytes_written);
|
2008-11-04 21:29:31 -07:00
|
|
|
comedi_buf_write_free(async, bi.bytes_written);
|
|
|
|
}
|
|
|
|
|
2010-05-19 11:09:50 -06:00
|
|
|
copyback_position:
|
2008-11-04 21:29:31 -07:00
|
|
|
bi.buf_write_count = async->buf_write_count;
|
|
|
|
bi.buf_write_ptr = async->buf_write_ptr;
|
|
|
|
bi.buf_read_count = async->buf_read_count;
|
|
|
|
bi.buf_read_ptr = async->buf_read_ptr;
|
|
|
|
|
2008-11-13 18:05:58 -07:00
|
|
|
copyback:
|
2012-12-19 15:42:02 -07:00
|
|
|
if (copy_to_user(arg, &bi, sizeof(bi)))
|
2008-11-04 21:29:31 -07:00
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-06-08 09:34:41 -06:00
|
|
|
static int check_insn_config_length(struct comedi_insn *insn,
|
|
|
|
unsigned int *data)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2008-11-13 18:05:58 -07:00
|
|
|
if (insn->n < 1)
|
|
|
|
return -EINVAL;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
switch (data[0]) {
|
|
|
|
case INSN_CONFIG_DIO_OUTPUT:
|
|
|
|
case INSN_CONFIG_DIO_INPUT:
|
|
|
|
case INSN_CONFIG_DISARM:
|
|
|
|
case INSN_CONFIG_RESET:
|
|
|
|
if (insn->n == 1)
|
|
|
|
return 0;
|
|
|
|
break;
|
|
|
|
case INSN_CONFIG_ARM:
|
|
|
|
case INSN_CONFIG_DIO_QUERY:
|
|
|
|
case INSN_CONFIG_BLOCK_SIZE:
|
|
|
|
case INSN_CONFIG_FILTER:
|
|
|
|
case INSN_CONFIG_SERIAL_CLOCK:
|
|
|
|
case INSN_CONFIG_BIDIRECTIONAL_DATA:
|
|
|
|
case INSN_CONFIG_ALT_SOURCE:
|
|
|
|
case INSN_CONFIG_SET_COUNTER_MODE:
|
|
|
|
case INSN_CONFIG_8254_READ_STATUS:
|
|
|
|
case INSN_CONFIG_SET_ROUTING:
|
|
|
|
case INSN_CONFIG_GET_ROUTING:
|
|
|
|
case INSN_CONFIG_GET_PWM_STATUS:
|
|
|
|
case INSN_CONFIG_PWM_SET_PERIOD:
|
|
|
|
case INSN_CONFIG_PWM_GET_PERIOD:
|
|
|
|
if (insn->n == 2)
|
|
|
|
return 0;
|
|
|
|
break;
|
|
|
|
case INSN_CONFIG_SET_GATE_SRC:
|
|
|
|
case INSN_CONFIG_GET_GATE_SRC:
|
|
|
|
case INSN_CONFIG_SET_CLOCK_SRC:
|
|
|
|
case INSN_CONFIG_GET_CLOCK_SRC:
|
|
|
|
case INSN_CONFIG_SET_OTHER_SRC:
|
|
|
|
case INSN_CONFIG_GET_COUNTER_STATUS:
|
|
|
|
case INSN_CONFIG_PWM_SET_H_BRIDGE:
|
|
|
|
case INSN_CONFIG_PWM_GET_H_BRIDGE:
|
|
|
|
case INSN_CONFIG_GET_HARDWARE_BUFFER_SIZE:
|
|
|
|
if (insn->n == 3)
|
|
|
|
return 0;
|
|
|
|
break;
|
|
|
|
case INSN_CONFIG_PWM_OUTPUT:
|
|
|
|
case INSN_CONFIG_ANALOG_TRIG:
|
|
|
|
if (insn->n == 5)
|
|
|
|
return 0;
|
|
|
|
break;
|
2012-11-14 04:22:57 -07:00
|
|
|
case INSN_CONFIG_DIGITAL_TRIG:
|
|
|
|
if (insn->n == 6)
|
|
|
|
return 0;
|
|
|
|
break;
|
2009-06-08 09:34:41 -06:00
|
|
|
/* by default we allow the insn since we don't have checks for
|
|
|
|
* all possible cases yet */
|
2008-11-04 21:29:31 -07:00
|
|
|
default:
|
2012-08-16 07:38:05 -06:00
|
|
|
pr_warn("comedi: No check for data length of config insn id %i is implemented.\n",
|
|
|
|
data[0]);
|
|
|
|
pr_warn("comedi: Add a check to %s in %s.\n",
|
|
|
|
__func__, __FILE__);
|
|
|
|
pr_warn("comedi: Assuming n=%i is correct.\n", insn->n);
|
2008-11-04 21:29:31 -07:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2009-06-08 09:34:41 -06:00
|
|
|
static int parse_insn(struct comedi_device *dev, struct comedi_insn *insn,
|
|
|
|
unsigned int *data, void *file)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2009-03-16 20:05:14 -06:00
|
|
|
struct comedi_subdevice *s;
|
2008-11-04 21:29:31 -07:00
|
|
|
int ret = 0;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (insn->insn & INSN_MASK_SPECIAL) {
|
|
|
|
/* a non-subdevice instruction */
|
|
|
|
|
|
|
|
switch (insn->insn) {
|
|
|
|
case INSN_GTOD:
|
|
|
|
{
|
|
|
|
struct timeval tv;
|
|
|
|
|
|
|
|
if (insn->n != 2) {
|
|
|
|
ret = -EINVAL;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
do_gettimeofday(&tv);
|
|
|
|
data[0] = tv.tv_sec;
|
|
|
|
data[1] = tv.tv_usec;
|
|
|
|
ret = 2;
|
|
|
|
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case INSN_WAIT:
|
|
|
|
if (insn->n != 1 || data[0] >= 100000) {
|
|
|
|
ret = -EINVAL;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
udelay(data[0] / 1000);
|
|
|
|
ret = 1;
|
|
|
|
break;
|
|
|
|
case INSN_INTTRIG:
|
|
|
|
if (insn->n != 1) {
|
|
|
|
ret = -EINVAL;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (insn->subdev >= dev->n_subdevices) {
|
|
|
|
DPRINTK("%d not usable subdevice\n",
|
|
|
|
insn->subdev);
|
|
|
|
ret = -EINVAL;
|
|
|
|
break;
|
|
|
|
}
|
2012-09-05 19:20:58 -06:00
|
|
|
s = &dev->subdevices[insn->subdev];
|
2008-11-04 21:29:31 -07:00
|
|
|
if (!s->async) {
|
|
|
|
DPRINTK("no async\n");
|
|
|
|
ret = -EINVAL;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (!s->async->inttrig) {
|
|
|
|
DPRINTK("no inttrig\n");
|
|
|
|
ret = -EAGAIN;
|
|
|
|
break;
|
|
|
|
}
|
2012-09-18 12:46:58 -06:00
|
|
|
ret = s->async->inttrig(dev, s, data[0]);
|
2008-11-04 21:29:31 -07:00
|
|
|
if (ret >= 0)
|
|
|
|
ret = 1;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
DPRINTK("invalid insn\n");
|
|
|
|
ret = -EINVAL;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
/* a subdevice instruction */
|
2009-03-16 20:05:02 -06:00
|
|
|
unsigned int maxdata;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
if (insn->subdev >= dev->n_subdevices) {
|
|
|
|
DPRINTK("subdevice %d out of range\n", insn->subdev);
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto out;
|
|
|
|
}
|
2012-09-05 19:20:58 -06:00
|
|
|
s = &dev->subdevices[insn->subdev];
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
if (s->type == COMEDI_SUBD_UNUSED) {
|
|
|
|
DPRINTK("%d not usable subdevice\n", insn->subdev);
|
|
|
|
ret = -EIO;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* are we locked? (ioctl lock) */
|
|
|
|
if (s->lock && s->lock != file) {
|
|
|
|
DPRINTK("device locked\n");
|
|
|
|
ret = -EACCES;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2010-05-01 13:33:17 -06:00
|
|
|
ret = comedi_check_chanlist(s, 1, &insn->chanspec);
|
2008-11-13 18:05:58 -07:00
|
|
|
if (ret < 0) {
|
2008-11-04 21:29:31 -07:00
|
|
|
ret = -EINVAL;
|
|
|
|
DPRINTK("bad chanspec\n");
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (s->busy) {
|
|
|
|
ret = -EBUSY;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
/* This looks arbitrary. It is. */
|
|
|
|
s->busy = &parse_insn;
|
|
|
|
switch (insn->insn) {
|
|
|
|
case INSN_READ:
|
|
|
|
ret = s->insn_read(dev, s, insn, data);
|
|
|
|
break;
|
|
|
|
case INSN_WRITE:
|
|
|
|
maxdata = s->maxdata_list
|
2008-11-13 18:05:58 -07:00
|
|
|
? s->maxdata_list[CR_CHAN(insn->chanspec)]
|
|
|
|
: s->maxdata;
|
2008-11-04 21:29:31 -07:00
|
|
|
for (i = 0; i < insn->n; ++i) {
|
|
|
|
if (data[i] > maxdata) {
|
|
|
|
ret = -EINVAL;
|
|
|
|
DPRINTK("bad data value(s)\n");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (ret == 0)
|
|
|
|
ret = s->insn_write(dev, s, insn, data);
|
|
|
|
break;
|
|
|
|
case INSN_BITS:
|
|
|
|
if (insn->n != 2) {
|
|
|
|
ret = -EINVAL;
|
2011-01-18 10:44:33 -07:00
|
|
|
} else {
|
|
|
|
/* Most drivers ignore the base channel in
|
|
|
|
* insn->chanspec. Fix this here if
|
|
|
|
* the subdevice has <= 32 channels. */
|
|
|
|
unsigned int shift;
|
|
|
|
unsigned int orig_mask;
|
|
|
|
|
|
|
|
orig_mask = data[0];
|
|
|
|
if (s->n_chan <= 32) {
|
|
|
|
shift = CR_CHAN(insn->chanspec);
|
|
|
|
if (shift > 0) {
|
|
|
|
insn->chanspec = 0;
|
|
|
|
data[0] <<= shift;
|
|
|
|
data[1] <<= shift;
|
|
|
|
}
|
|
|
|
} else
|
|
|
|
shift = 0;
|
|
|
|
ret = s->insn_bits(dev, s, insn, data);
|
|
|
|
data[0] = orig_mask;
|
|
|
|
if (shift > 0)
|
|
|
|
data[1] >>= shift;
|
2008-11-04 21:29:31 -07:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
case INSN_CONFIG:
|
|
|
|
ret = check_insn_config_length(insn, data);
|
|
|
|
if (ret)
|
|
|
|
break;
|
|
|
|
ret = s->insn_config(dev, s, insn, data);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
ret = -EINVAL;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
s->busy = NULL;
|
|
|
|
}
|
|
|
|
|
2008-11-13 18:05:58 -07:00
|
|
|
out:
|
2008-11-04 21:29:31 -07:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2013-01-21 14:02:59 -07:00
|
|
|
/*
|
|
|
|
* COMEDI_INSNLIST
|
|
|
|
* synchronous instructions
|
|
|
|
*
|
|
|
|
* arg:
|
|
|
|
* pointer to sync cmd structure
|
|
|
|
*
|
|
|
|
* reads:
|
|
|
|
* sync cmd struct at arg
|
|
|
|
* instruction list
|
|
|
|
* data (for writes)
|
|
|
|
*
|
|
|
|
* writes:
|
|
|
|
* data (for reads)
|
|
|
|
*/
|
|
|
|
/* arbitrary limits */
|
|
|
|
#define MAX_SAMPLES 256
|
|
|
|
static int do_insnlist_ioctl(struct comedi_device *dev,
|
|
|
|
struct comedi_insnlist __user *arg, void *file)
|
|
|
|
{
|
|
|
|
struct comedi_insnlist insnlist;
|
|
|
|
struct comedi_insn *insns = NULL;
|
|
|
|
unsigned int *data = NULL;
|
|
|
|
int i = 0;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
if (copy_from_user(&insnlist, arg, sizeof(insnlist)))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
data = kmalloc(sizeof(unsigned int) * MAX_SAMPLES, GFP_KERNEL);
|
|
|
|
if (!data) {
|
|
|
|
DPRINTK("kmalloc failed\n");
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
insns = kcalloc(insnlist.n_insns, sizeof(*insns), GFP_KERNEL);
|
|
|
|
if (!insns) {
|
|
|
|
DPRINTK("kmalloc failed\n");
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (copy_from_user(insns, insnlist.insns,
|
|
|
|
sizeof(*insns) * insnlist.n_insns)) {
|
|
|
|
DPRINTK("copy_from_user failed\n");
|
|
|
|
ret = -EFAULT;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < insnlist.n_insns; i++) {
|
|
|
|
if (insns[i].n > MAX_SAMPLES) {
|
|
|
|
DPRINTK("number of samples too large\n");
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
if (insns[i].insn & INSN_MASK_WRITE) {
|
|
|
|
if (copy_from_user(data, insns[i].data,
|
|
|
|
insns[i].n * sizeof(unsigned int))) {
|
|
|
|
DPRINTK("copy_from_user failed\n");
|
|
|
|
ret = -EFAULT;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
ret = parse_insn(dev, insns + i, data, file);
|
|
|
|
if (ret < 0)
|
|
|
|
goto error;
|
|
|
|
if (insns[i].insn & INSN_MASK_READ) {
|
|
|
|
if (copy_to_user(insns[i].data, data,
|
|
|
|
insns[i].n * sizeof(unsigned int))) {
|
|
|
|
DPRINTK("copy_to_user failed\n");
|
|
|
|
ret = -EFAULT;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (need_resched())
|
|
|
|
schedule();
|
|
|
|
}
|
|
|
|
|
|
|
|
error:
|
|
|
|
kfree(insns);
|
|
|
|
kfree(data);
|
|
|
|
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
|
2008-11-04 21:29:31 -07:00
|
|
|
/*
|
2010-03-10 01:47:44 -07:00
|
|
|
* COMEDI_INSN
|
|
|
|
* synchronous instructions
|
2008-11-04 21:29:31 -07:00
|
|
|
*
|
2010-03-10 01:47:44 -07:00
|
|
|
* arg:
|
|
|
|
* pointer to insn
|
2008-11-04 21:29:31 -07:00
|
|
|
*
|
2010-03-10 01:47:44 -07:00
|
|
|
* reads:
|
|
|
|
* struct comedi_insn struct at arg
|
|
|
|
* data (for writes)
|
2008-11-04 21:29:31 -07:00
|
|
|
*
|
2010-03-10 01:47:44 -07:00
|
|
|
* writes:
|
|
|
|
* data (for reads)
|
2008-11-04 21:29:31 -07:00
|
|
|
*/
|
2010-05-03 17:32:28 -06:00
|
|
|
static int do_insn_ioctl(struct comedi_device *dev,
|
|
|
|
struct comedi_insn __user *arg, void *file)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2009-03-16 20:05:53 -06:00
|
|
|
struct comedi_insn insn;
|
2009-03-16 20:05:02 -06:00
|
|
|
unsigned int *data = NULL;
|
2008-11-04 21:29:31 -07:00
|
|
|
int ret = 0;
|
|
|
|
|
2009-03-16 20:05:02 -06:00
|
|
|
data = kmalloc(sizeof(unsigned int) * MAX_SAMPLES, GFP_KERNEL);
|
2008-11-04 21:29:31 -07:00
|
|
|
if (!data) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
2012-12-19 15:42:02 -07:00
|
|
|
if (copy_from_user(&insn, arg, sizeof(insn))) {
|
2008-11-04 21:29:31 -07:00
|
|
|
ret = -EFAULT;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* This is where the behavior of insn and insnlist deviate. */
|
|
|
|
if (insn.n > MAX_SAMPLES)
|
|
|
|
insn.n = MAX_SAMPLES;
|
|
|
|
if (insn.insn & INSN_MASK_WRITE) {
|
2010-05-13 03:44:39 -06:00
|
|
|
if (copy_from_user(data,
|
|
|
|
insn.data,
|
|
|
|
insn.n * sizeof(unsigned int))) {
|
2008-11-04 21:29:31 -07:00
|
|
|
ret = -EFAULT;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
ret = parse_insn(dev, &insn, data, file);
|
|
|
|
if (ret < 0)
|
|
|
|
goto error;
|
|
|
|
if (insn.insn & INSN_MASK_READ) {
|
2010-05-13 03:44:39 -06:00
|
|
|
if (copy_to_user(insn.data,
|
|
|
|
data,
|
|
|
|
insn.n * sizeof(unsigned int))) {
|
2008-11-04 21:29:31 -07:00
|
|
|
ret = -EFAULT;
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
ret = insn.n;
|
|
|
|
|
2008-11-13 18:05:58 -07:00
|
|
|
error:
|
|
|
|
kfree(data);
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2010-05-03 17:32:28 -06:00
|
|
|
static int do_cmd_ioctl(struct comedi_device *dev,
|
2012-09-18 12:41:54 -06:00
|
|
|
struct comedi_cmd __user *arg, void *file)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2012-09-18 12:42:37 -06:00
|
|
|
struct comedi_cmd cmd;
|
2009-03-16 20:05:14 -06:00
|
|
|
struct comedi_subdevice *s;
|
2009-03-16 20:05:20 -06:00
|
|
|
struct comedi_async *async;
|
2008-11-04 21:29:31 -07:00
|
|
|
int ret = 0;
|
2012-09-18 12:43:52 -06:00
|
|
|
unsigned int __user *user_chanlist;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2012-12-19 15:42:02 -07:00
|
|
|
if (copy_from_user(&cmd, arg, sizeof(cmd))) {
|
2008-11-04 21:29:31 -07:00
|
|
|
DPRINTK("bad cmd address\n");
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
2008-11-13 18:05:58 -07:00
|
|
|
/* save user's chanlist pointer so it can be restored later */
|
2012-09-18 12:43:52 -06:00
|
|
|
user_chanlist = (unsigned int __user *)cmd.chanlist;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2012-09-18 12:42:37 -06:00
|
|
|
if (cmd.subdev >= dev->n_subdevices) {
|
|
|
|
DPRINTK("%d no such subdevice\n", cmd.subdev);
|
2008-11-04 21:29:31 -07:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
2012-09-18 12:42:37 -06:00
|
|
|
s = &dev->subdevices[cmd.subdev];
|
2008-11-04 21:29:31 -07:00
|
|
|
async = s->async;
|
|
|
|
|
|
|
|
if (s->type == COMEDI_SUBD_UNUSED) {
|
2012-09-18 12:42:37 -06:00
|
|
|
DPRINTK("%d not valid subdevice\n", cmd.subdev);
|
2008-11-04 21:29:31 -07:00
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!s->do_cmd || !s->do_cmdtest || !s->async) {
|
|
|
|
DPRINTK("subdevice %i does not support commands\n",
|
2012-09-18 12:42:37 -06:00
|
|
|
cmd.subdev);
|
2008-11-04 21:29:31 -07:00
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* are we locked? (ioctl lock) */
|
|
|
|
if (s->lock && s->lock != file) {
|
|
|
|
DPRINTK("subdevice locked\n");
|
|
|
|
return -EACCES;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* are we busy? */
|
|
|
|
if (s->busy) {
|
|
|
|
DPRINTK("subdevice busy\n");
|
|
|
|
return -EBUSY;
|
|
|
|
}
|
|
|
|
s->busy = file;
|
|
|
|
|
|
|
|
/* make sure channel/gain list isn't too long */
|
2012-09-18 12:42:37 -06:00
|
|
|
if (cmd.chanlist_len > s->len_chanlist) {
|
2008-11-04 21:29:31 -07:00
|
|
|
DPRINTK("channel/gain list too long %u > %d\n",
|
2012-09-18 12:42:37 -06:00
|
|
|
cmd.chanlist_len, s->len_chanlist);
|
2008-11-04 21:29:31 -07:00
|
|
|
ret = -EINVAL;
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* make sure channel/gain list isn't too short */
|
2012-09-18 12:42:37 -06:00
|
|
|
if (cmd.chanlist_len < 1) {
|
2008-11-04 21:29:31 -07:00
|
|
|
DPRINTK("channel/gain list too short %u < 1\n",
|
2012-09-18 12:42:37 -06:00
|
|
|
cmd.chanlist_len);
|
2008-11-04 21:29:31 -07:00
|
|
|
ret = -EINVAL;
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
2012-09-18 12:42:37 -06:00
|
|
|
async->cmd = cmd;
|
2008-11-04 21:29:31 -07:00
|
|
|
async->cmd.data = NULL;
|
|
|
|
/* load channel/gain list */
|
|
|
|
async->cmd.chanlist =
|
2008-11-13 18:05:58 -07:00
|
|
|
kmalloc(async->cmd.chanlist_len * sizeof(int), GFP_KERNEL);
|
2008-11-04 21:29:31 -07:00
|
|
|
if (!async->cmd.chanlist) {
|
|
|
|
DPRINTK("allocation failed\n");
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
2012-09-18 12:43:52 -06:00
|
|
|
if (copy_from_user(async->cmd.chanlist, user_chanlist,
|
2008-11-13 18:05:58 -07:00
|
|
|
async->cmd.chanlist_len * sizeof(int))) {
|
2008-11-04 21:29:31 -07:00
|
|
|
DPRINTK("fault reading chanlist\n");
|
|
|
|
ret = -EFAULT;
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* make sure each element in channel/gain list is valid */
|
2010-05-13 03:44:39 -06:00
|
|
|
ret = comedi_check_chanlist(s,
|
|
|
|
async->cmd.chanlist_len,
|
|
|
|
async->cmd.chanlist);
|
2008-11-13 18:05:58 -07:00
|
|
|
if (ret < 0) {
|
2008-11-04 21:29:31 -07:00
|
|
|
DPRINTK("bad chanlist\n");
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = s->do_cmdtest(dev, s, &async->cmd);
|
|
|
|
|
|
|
|
if (async->cmd.flags & TRIG_BOGUS || ret) {
|
|
|
|
DPRINTK("test returned %d\n", ret);
|
2012-09-18 12:42:37 -06:00
|
|
|
cmd = async->cmd;
|
2008-11-13 18:05:58 -07:00
|
|
|
/* restore chanlist pointer before copying back */
|
2012-09-18 12:43:52 -06:00
|
|
|
cmd.chanlist = (unsigned int __force *)user_chanlist;
|
2012-09-18 12:42:37 -06:00
|
|
|
cmd.data = NULL;
|
2012-12-19 15:42:02 -07:00
|
|
|
if (copy_to_user(arg, &cmd, sizeof(cmd))) {
|
2008-11-04 21:29:31 -07:00
|
|
|
DPRINTK("fault writing cmd\n");
|
|
|
|
ret = -EFAULT;
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
ret = -EAGAIN;
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!async->prealloc_bufsz) {
|
|
|
|
ret = -ENOMEM;
|
|
|
|
DPRINTK("no buffer (?)\n");
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
2013-01-09 13:27:07 -07:00
|
|
|
comedi_buf_reset(async);
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
async->cb_mask =
|
2008-11-13 18:05:58 -07:00
|
|
|
COMEDI_CB_EOA | COMEDI_CB_BLOCK | COMEDI_CB_ERROR |
|
|
|
|
COMEDI_CB_OVERFLOW;
|
|
|
|
if (async->cmd.flags & TRIG_WAKE_EOS)
|
2008-11-04 21:29:31 -07:00
|
|
|
async->cb_mask |= COMEDI_CB_EOS;
|
|
|
|
|
|
|
|
comedi_set_subdevice_runflags(s, ~0, SRF_USER | SRF_RUNNING);
|
|
|
|
|
|
|
|
ret = s->do_cmd(dev, s);
|
|
|
|
if (ret == 0)
|
|
|
|
return 0;
|
|
|
|
|
2008-11-13 18:05:58 -07:00
|
|
|
cleanup:
|
2008-11-04 21:29:31 -07:00
|
|
|
do_become_nonbusy(dev, s);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
COMEDI_CMDTEST
|
|
|
|
command testing ioctl
|
|
|
|
|
|
|
|
arg:
|
|
|
|
pointer to cmd structure
|
|
|
|
|
|
|
|
reads:
|
|
|
|
cmd structure at arg
|
|
|
|
channel/range list
|
|
|
|
|
|
|
|
writes:
|
|
|
|
modified cmd structure at arg
|
|
|
|
|
|
|
|
*/
|
2010-05-03 17:32:28 -06:00
|
|
|
static int do_cmdtest_ioctl(struct comedi_device *dev,
|
|
|
|
struct comedi_cmd __user *arg, void *file)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2012-09-18 12:43:13 -06:00
|
|
|
struct comedi_cmd cmd;
|
2009-03-16 20:05:14 -06:00
|
|
|
struct comedi_subdevice *s;
|
2008-11-04 21:29:31 -07:00
|
|
|
int ret = 0;
|
|
|
|
unsigned int *chanlist = NULL;
|
2012-09-18 12:43:52 -06:00
|
|
|
unsigned int __user *user_chanlist;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2012-12-19 15:42:02 -07:00
|
|
|
if (copy_from_user(&cmd, arg, sizeof(cmd))) {
|
2008-11-04 21:29:31 -07:00
|
|
|
DPRINTK("bad cmd address\n");
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
2008-11-13 18:05:58 -07:00
|
|
|
/* save user's chanlist pointer so it can be restored later */
|
2012-09-18 12:43:52 -06:00
|
|
|
user_chanlist = (unsigned int __user *)cmd.chanlist;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2012-09-18 12:43:13 -06:00
|
|
|
if (cmd.subdev >= dev->n_subdevices) {
|
|
|
|
DPRINTK("%d no such subdevice\n", cmd.subdev);
|
2008-11-04 21:29:31 -07:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
2012-09-18 12:43:13 -06:00
|
|
|
s = &dev->subdevices[cmd.subdev];
|
2008-11-04 21:29:31 -07:00
|
|
|
if (s->type == COMEDI_SUBD_UNUSED) {
|
2012-09-18 12:43:13 -06:00
|
|
|
DPRINTK("%d not valid subdevice\n", cmd.subdev);
|
2008-11-04 21:29:31 -07:00
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!s->do_cmd || !s->do_cmdtest) {
|
|
|
|
DPRINTK("subdevice %i does not support commands\n",
|
2012-09-18 12:43:13 -06:00
|
|
|
cmd.subdev);
|
2008-11-04 21:29:31 -07:00
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* make sure channel/gain list isn't too long */
|
2012-09-18 12:43:13 -06:00
|
|
|
if (cmd.chanlist_len > s->len_chanlist) {
|
2008-11-04 21:29:31 -07:00
|
|
|
DPRINTK("channel/gain list too long %d > %d\n",
|
2012-09-18 12:43:13 -06:00
|
|
|
cmd.chanlist_len, s->len_chanlist);
|
2008-11-04 21:29:31 -07:00
|
|
|
ret = -EINVAL;
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* load channel/gain list */
|
2012-09-18 12:43:13 -06:00
|
|
|
if (cmd.chanlist) {
|
2008-11-04 21:29:31 -07:00
|
|
|
chanlist =
|
2012-09-18 12:43:13 -06:00
|
|
|
kmalloc(cmd.chanlist_len * sizeof(int), GFP_KERNEL);
|
2008-11-04 21:29:31 -07:00
|
|
|
if (!chanlist) {
|
|
|
|
DPRINTK("allocation failed\n");
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
2012-09-18 12:43:52 -06:00
|
|
|
if (copy_from_user(chanlist, user_chanlist,
|
2012-09-18 12:43:13 -06:00
|
|
|
cmd.chanlist_len * sizeof(int))) {
|
2008-11-04 21:29:31 -07:00
|
|
|
DPRINTK("fault reading chanlist\n");
|
|
|
|
ret = -EFAULT;
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* make sure each element in channel/gain list is valid */
|
2012-09-18 12:43:13 -06:00
|
|
|
ret = comedi_check_chanlist(s, cmd.chanlist_len, chanlist);
|
2008-11-13 18:05:58 -07:00
|
|
|
if (ret < 0) {
|
2008-11-04 21:29:31 -07:00
|
|
|
DPRINTK("bad chanlist\n");
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
2012-09-18 12:43:13 -06:00
|
|
|
cmd.chanlist = chanlist;
|
2008-11-04 21:29:31 -07:00
|
|
|
}
|
|
|
|
|
2012-09-18 12:43:13 -06:00
|
|
|
ret = s->do_cmdtest(dev, s, &cmd);
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2008-11-13 18:05:58 -07:00
|
|
|
/* restore chanlist pointer before copying back */
|
2012-09-18 12:43:52 -06:00
|
|
|
cmd.chanlist = (unsigned int __force *)user_chanlist;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2012-12-19 15:42:02 -07:00
|
|
|
if (copy_to_user(arg, &cmd, sizeof(cmd))) {
|
2008-11-04 21:29:31 -07:00
|
|
|
DPRINTK("bad cmd address\n");
|
|
|
|
ret = -EFAULT;
|
|
|
|
goto cleanup;
|
|
|
|
}
|
2008-11-13 18:05:58 -07:00
|
|
|
cleanup:
|
|
|
|
kfree(chanlist);
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
COMEDI_LOCK
|
|
|
|
lock subdevice
|
|
|
|
|
|
|
|
arg:
|
|
|
|
subdevice number
|
|
|
|
|
|
|
|
reads:
|
|
|
|
none
|
|
|
|
|
|
|
|
writes:
|
|
|
|
none
|
|
|
|
|
|
|
|
*/
|
|
|
|
|
2009-06-08 09:34:41 -06:00
|
|
|
static int do_lock_ioctl(struct comedi_device *dev, unsigned int arg,
|
|
|
|
void *file)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
|
|
|
int ret = 0;
|
|
|
|
unsigned long flags;
|
2009-03-16 20:05:14 -06:00
|
|
|
struct comedi_subdevice *s;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
if (arg >= dev->n_subdevices)
|
|
|
|
return -EINVAL;
|
2012-09-05 19:20:58 -06:00
|
|
|
s = &dev->subdevices[arg];
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2009-04-27 15:44:31 -06:00
|
|
|
spin_lock_irqsave(&s->spin_lock, flags);
|
2008-11-13 18:05:58 -07:00
|
|
|
if (s->busy || s->lock)
|
2008-11-04 21:29:31 -07:00
|
|
|
ret = -EBUSY;
|
2008-11-13 18:05:58 -07:00
|
|
|
else
|
2008-11-04 21:29:31 -07:00
|
|
|
s->lock = file;
|
2009-04-27 15:44:31 -06:00
|
|
|
spin_unlock_irqrestore(&s->spin_lock, flags);
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2011-06-13 12:11:47 -06:00
|
|
|
#if 0
|
2008-11-04 21:29:31 -07:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
if (s->lock_f)
|
|
|
|
ret = s->lock_f(dev, s);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
COMEDI_UNLOCK
|
|
|
|
unlock subdevice
|
|
|
|
|
|
|
|
arg:
|
|
|
|
subdevice number
|
|
|
|
|
|
|
|
reads:
|
|
|
|
none
|
|
|
|
|
|
|
|
writes:
|
|
|
|
none
|
|
|
|
|
|
|
|
This function isn't protected by the semaphore, since
|
|
|
|
we already own the lock.
|
|
|
|
*/
|
2009-06-08 09:34:41 -06:00
|
|
|
static int do_unlock_ioctl(struct comedi_device *dev, unsigned int arg,
|
|
|
|
void *file)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2009-03-16 20:05:14 -06:00
|
|
|
struct comedi_subdevice *s;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
if (arg >= dev->n_subdevices)
|
|
|
|
return -EINVAL;
|
2012-09-05 19:20:58 -06:00
|
|
|
s = &dev->subdevices[arg];
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
if (s->busy)
|
|
|
|
return -EBUSY;
|
|
|
|
|
|
|
|
if (s->lock && s->lock != file)
|
|
|
|
return -EACCES;
|
|
|
|
|
|
|
|
if (s->lock == file) {
|
|
|
|
#if 0
|
|
|
|
if (s->unlock)
|
|
|
|
s->unlock(dev, s);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
s->lock = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
COMEDI_CANCEL
|
|
|
|
cancel acquisition ioctl
|
|
|
|
|
|
|
|
arg:
|
|
|
|
subdevice number
|
|
|
|
|
|
|
|
reads:
|
|
|
|
nothing
|
|
|
|
|
|
|
|
writes:
|
|
|
|
nothing
|
|
|
|
|
|
|
|
*/
|
2009-06-08 09:34:41 -06:00
|
|
|
static int do_cancel_ioctl(struct comedi_device *dev, unsigned int arg,
|
|
|
|
void *file)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2009-03-16 20:05:14 -06:00
|
|
|
struct comedi_subdevice *s;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
if (arg >= dev->n_subdevices)
|
|
|
|
return -EINVAL;
|
2012-09-05 19:20:58 -06:00
|
|
|
s = &dev->subdevices[arg];
|
2008-11-04 21:29:31 -07:00
|
|
|
if (s->async == NULL)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (s->lock && s->lock != file)
|
|
|
|
return -EACCES;
|
|
|
|
|
|
|
|
if (!s->busy)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (s->busy != file)
|
|
|
|
return -EBUSY;
|
|
|
|
|
|
|
|
return do_cancel(dev, s);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
COMEDI_POLL ioctl
|
|
|
|
instructs driver to synchronize buffers
|
|
|
|
|
|
|
|
arg:
|
|
|
|
subdevice number
|
|
|
|
|
|
|
|
reads:
|
|
|
|
nothing
|
|
|
|
|
|
|
|
writes:
|
|
|
|
nothing
|
|
|
|
|
|
|
|
*/
|
2009-06-08 09:34:41 -06:00
|
|
|
static int do_poll_ioctl(struct comedi_device *dev, unsigned int arg,
|
|
|
|
void *file)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2009-03-16 20:05:14 -06:00
|
|
|
struct comedi_subdevice *s;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
if (arg >= dev->n_subdevices)
|
|
|
|
return -EINVAL;
|
2012-09-05 19:20:58 -06:00
|
|
|
s = &dev->subdevices[arg];
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
if (s->lock && s->lock != file)
|
|
|
|
return -EACCES;
|
|
|
|
|
|
|
|
if (!s->busy)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (s->busy != file)
|
|
|
|
return -EBUSY;
|
|
|
|
|
|
|
|
if (s->poll)
|
|
|
|
return s->poll(dev, s);
|
|
|
|
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2012-06-07 18:05:27 -06:00
|
|
|
static long comedi_unlocked_ioctl(struct file *file, unsigned int cmd,
|
|
|
|
unsigned long arg)
|
|
|
|
{
|
2013-02-27 14:59:05 -07:00
|
|
|
const unsigned minor = iminor(file_inode(file));
|
2013-01-07 16:17:52 -07:00
|
|
|
struct comedi_file_info *info = comedi_file_info_from_minor(minor);
|
2013-01-08 06:27:48 -07:00
|
|
|
struct comedi_device *dev = comedi_dev_from_file_info(info);
|
2012-06-07 18:05:27 -06:00
|
|
|
int rc;
|
|
|
|
|
2012-12-19 15:35:23 -07:00
|
|
|
if (!dev)
|
2012-06-07 18:05:27 -06:00
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
mutex_lock(&dev->mutex);
|
|
|
|
|
|
|
|
/* Device config is special, because it must work on
|
|
|
|
* an unconfigured device. */
|
|
|
|
if (cmd == COMEDI_DEVCONFIG) {
|
2013-01-28 09:14:31 -07:00
|
|
|
if (minor >= COMEDI_NUM_BOARD_MINORS) {
|
|
|
|
/* Device config not appropriate on non-board minors. */
|
|
|
|
rc = -ENOTTY;
|
|
|
|
goto done;
|
|
|
|
}
|
2012-06-07 18:05:27 -06:00
|
|
|
rc = do_devconfig_ioctl(dev,
|
|
|
|
(struct comedi_devconfig __user *)arg);
|
2012-12-04 08:59:55 -07:00
|
|
|
if (rc == 0)
|
|
|
|
/* Evade comedi_auto_unconfig(). */
|
2013-01-07 16:17:52 -07:00
|
|
|
info->hardware_device = NULL;
|
2012-06-07 18:05:27 -06:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!dev->attached) {
|
|
|
|
DPRINTK("no driver configured on /dev/comedi%i\n", dev->minor);
|
|
|
|
rc = -ENODEV;
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (cmd) {
|
|
|
|
case COMEDI_BUFCONFIG:
|
|
|
|
rc = do_bufconfig_ioctl(dev,
|
|
|
|
(struct comedi_bufconfig __user *)arg);
|
|
|
|
break;
|
|
|
|
case COMEDI_DEVINFO:
|
|
|
|
rc = do_devinfo_ioctl(dev, (struct comedi_devinfo __user *)arg,
|
|
|
|
file);
|
|
|
|
break;
|
|
|
|
case COMEDI_SUBDINFO:
|
|
|
|
rc = do_subdinfo_ioctl(dev,
|
|
|
|
(struct comedi_subdinfo __user *)arg,
|
|
|
|
file);
|
|
|
|
break;
|
|
|
|
case COMEDI_CHANINFO:
|
|
|
|
rc = do_chaninfo_ioctl(dev, (void __user *)arg);
|
|
|
|
break;
|
|
|
|
case COMEDI_RANGEINFO:
|
|
|
|
rc = do_rangeinfo_ioctl(dev, (void __user *)arg);
|
|
|
|
break;
|
|
|
|
case COMEDI_BUFINFO:
|
|
|
|
rc = do_bufinfo_ioctl(dev,
|
|
|
|
(struct comedi_bufinfo __user *)arg,
|
|
|
|
file);
|
|
|
|
break;
|
|
|
|
case COMEDI_LOCK:
|
|
|
|
rc = do_lock_ioctl(dev, arg, file);
|
|
|
|
break;
|
|
|
|
case COMEDI_UNLOCK:
|
|
|
|
rc = do_unlock_ioctl(dev, arg, file);
|
|
|
|
break;
|
|
|
|
case COMEDI_CANCEL:
|
|
|
|
rc = do_cancel_ioctl(dev, arg, file);
|
|
|
|
break;
|
|
|
|
case COMEDI_CMD:
|
|
|
|
rc = do_cmd_ioctl(dev, (struct comedi_cmd __user *)arg, file);
|
|
|
|
break;
|
|
|
|
case COMEDI_CMDTEST:
|
|
|
|
rc = do_cmdtest_ioctl(dev, (struct comedi_cmd __user *)arg,
|
|
|
|
file);
|
|
|
|
break;
|
|
|
|
case COMEDI_INSNLIST:
|
|
|
|
rc = do_insnlist_ioctl(dev,
|
|
|
|
(struct comedi_insnlist __user *)arg,
|
|
|
|
file);
|
|
|
|
break;
|
|
|
|
case COMEDI_INSN:
|
|
|
|
rc = do_insn_ioctl(dev, (struct comedi_insn __user *)arg,
|
|
|
|
file);
|
|
|
|
break;
|
|
|
|
case COMEDI_POLL:
|
|
|
|
rc = do_poll_ioctl(dev, arg, file);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
rc = -ENOTTY;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
done:
|
|
|
|
mutex_unlock(&dev->mutex);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2011-10-29 01:45:39 -06:00
|
|
|
static void comedi_vm_open(struct vm_area_struct *area)
|
|
|
|
{
|
|
|
|
struct comedi_async *async;
|
|
|
|
struct comedi_device *dev;
|
|
|
|
|
|
|
|
async = area->vm_private_data;
|
|
|
|
dev = async->subdevice->device;
|
|
|
|
|
|
|
|
mutex_lock(&dev->mutex);
|
|
|
|
async->mmap_count++;
|
|
|
|
mutex_unlock(&dev->mutex);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void comedi_vm_close(struct vm_area_struct *area)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2009-03-16 20:05:20 -06:00
|
|
|
struct comedi_async *async;
|
2009-03-16 20:05:08 -06:00
|
|
|
struct comedi_device *dev;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
async = area->vm_private_data;
|
|
|
|
dev = async->subdevice->device;
|
|
|
|
|
|
|
|
mutex_lock(&dev->mutex);
|
|
|
|
async->mmap_count--;
|
|
|
|
mutex_unlock(&dev->mutex);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct vm_operations_struct comedi_vm_ops = {
|
2011-10-29 01:45:39 -06:00
|
|
|
.open = comedi_vm_open,
|
|
|
|
.close = comedi_vm_close,
|
2008-11-04 21:29:31 -07:00
|
|
|
};
|
|
|
|
|
|
|
|
static int comedi_mmap(struct file *file, struct vm_area_struct *vma)
|
|
|
|
{
|
2013-02-27 14:59:05 -07:00
|
|
|
const unsigned minor = iminor(file_inode(file));
|
2012-12-19 15:45:12 -07:00
|
|
|
struct comedi_file_info *info = comedi_file_info_from_minor(minor);
|
2013-01-08 06:27:48 -07:00
|
|
|
struct comedi_device *dev = comedi_dev_from_file_info(info);
|
2012-12-19 15:45:12 -07:00
|
|
|
struct comedi_subdevice *s;
|
|
|
|
struct comedi_async *async;
|
2008-11-04 21:29:31 -07:00
|
|
|
unsigned long start = vma->vm_start;
|
|
|
|
unsigned long size;
|
|
|
|
int n_pages;
|
|
|
|
int i;
|
|
|
|
int retval;
|
2011-11-08 14:23:03 -07:00
|
|
|
|
2012-12-19 15:45:12 -07:00
|
|
|
if (!dev)
|
2011-12-14 06:23:24 -07:00
|
|
|
return -ENODEV;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
mutex_lock(&dev->mutex);
|
2012-12-19 15:45:12 -07:00
|
|
|
|
2008-11-04 21:29:31 -07:00
|
|
|
if (!dev->attached) {
|
|
|
|
DPRINTK("no driver configured on comedi%i\n", dev->minor);
|
|
|
|
retval = -ENODEV;
|
|
|
|
goto done;
|
|
|
|
}
|
2012-12-19 15:45:12 -07:00
|
|
|
|
2008-11-13 18:05:58 -07:00
|
|
|
if (vma->vm_flags & VM_WRITE)
|
2012-12-19 15:38:53 -07:00
|
|
|
s = comedi_write_subdevice(info);
|
2008-11-13 18:05:58 -07:00
|
|
|
else
|
2012-12-19 15:38:53 -07:00
|
|
|
s = comedi_read_subdevice(info);
|
2012-12-19 15:45:12 -07:00
|
|
|
if (!s) {
|
2008-11-04 21:29:31 -07:00
|
|
|
retval = -EINVAL;
|
|
|
|
goto done;
|
|
|
|
}
|
2012-12-19 15:45:12 -07:00
|
|
|
|
2008-11-04 21:29:31 -07:00
|
|
|
async = s->async;
|
2012-12-19 15:45:12 -07:00
|
|
|
if (!async) {
|
2008-11-04 21:29:31 -07:00
|
|
|
retval = -EINVAL;
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (vma->vm_pgoff != 0) {
|
|
|
|
DPRINTK("comedi: mmap() offset must be 0.\n");
|
|
|
|
retval = -EINVAL;
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
size = vma->vm_end - vma->vm_start;
|
|
|
|
if (size > async->prealloc_bufsz) {
|
|
|
|
retval = -EFAULT;
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
if (size & (~PAGE_MASK)) {
|
|
|
|
retval = -EFAULT;
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
n_pages = size >> PAGE_SHIFT;
|
|
|
|
for (i = 0; i < n_pages; ++i) {
|
2012-12-19 15:45:12 -07:00
|
|
|
struct comedi_buf_page *buf = &async->buf_page_list[i];
|
|
|
|
|
2008-11-04 21:29:31 -07:00
|
|
|
if (remap_pfn_range(vma, start,
|
2012-12-19 15:45:12 -07:00
|
|
|
page_to_pfn(virt_to_page(buf->virt_addr)),
|
|
|
|
PAGE_SIZE, PAGE_SHARED)) {
|
2008-11-04 21:29:31 -07:00
|
|
|
retval = -EAGAIN;
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
start += PAGE_SIZE;
|
|
|
|
}
|
|
|
|
|
|
|
|
vma->vm_ops = &comedi_vm_ops;
|
|
|
|
vma->vm_private_data = async;
|
|
|
|
|
|
|
|
async->mmap_count++;
|
|
|
|
|
|
|
|
retval = 0;
|
2008-11-13 18:05:58 -07:00
|
|
|
done:
|
2008-11-04 21:29:31 -07:00
|
|
|
mutex_unlock(&dev->mutex);
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
2012-04-16 04:40:22 -06:00
|
|
|
static unsigned int comedi_poll(struct file *file, poll_table *wait)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
|
|
|
unsigned int mask = 0;
|
2013-02-27 14:59:05 -07:00
|
|
|
const unsigned minor = iminor(file_inode(file));
|
2012-12-19 15:38:30 -07:00
|
|
|
struct comedi_file_info *info = comedi_file_info_from_minor(minor);
|
2013-01-08 06:27:48 -07:00
|
|
|
struct comedi_device *dev = comedi_dev_from_file_info(info);
|
2012-12-19 15:39:44 -07:00
|
|
|
struct comedi_subdevice *s;
|
2011-11-08 14:23:03 -07:00
|
|
|
|
2012-12-19 15:39:44 -07:00
|
|
|
if (!dev)
|
2011-12-14 06:23:24 -07:00
|
|
|
return -ENODEV;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
mutex_lock(&dev->mutex);
|
2012-12-19 15:39:44 -07:00
|
|
|
|
2008-11-04 21:29:31 -07:00
|
|
|
if (!dev->attached) {
|
|
|
|
DPRINTK("no driver configured on comedi%i\n", dev->minor);
|
2012-12-19 15:39:44 -07:00
|
|
|
goto done;
|
2008-11-04 21:29:31 -07:00
|
|
|
}
|
|
|
|
|
2012-12-19 15:39:44 -07:00
|
|
|
s = comedi_read_subdevice(info);
|
2013-02-05 05:50:40 -07:00
|
|
|
if (s && s->async) {
|
2012-12-19 15:39:44 -07:00
|
|
|
poll_wait(file, &s->async->wait_head, wait);
|
2012-12-19 15:43:18 -07:00
|
|
|
if (!s->busy || !comedi_is_subdevice_running(s) ||
|
2012-12-19 15:39:44 -07:00
|
|
|
comedi_buf_read_n_available(s->async) > 0)
|
2008-11-04 21:29:31 -07:00
|
|
|
mask |= POLLIN | POLLRDNORM;
|
|
|
|
}
|
2012-12-19 15:39:44 -07:00
|
|
|
|
|
|
|
s = comedi_write_subdevice(info);
|
2013-02-05 05:50:40 -07:00
|
|
|
if (s && s->async) {
|
2012-12-19 15:39:44 -07:00
|
|
|
unsigned int bps = bytes_per_sample(s->async->subdevice);
|
|
|
|
|
|
|
|
poll_wait(file, &s->async->wait_head, wait);
|
|
|
|
comedi_buf_write_alloc(s->async, s->async->prealloc_bufsz);
|
2012-12-19 15:43:18 -07:00
|
|
|
if (!s->busy || !comedi_is_subdevice_running(s) ||
|
2012-12-19 15:39:44 -07:00
|
|
|
comedi_buf_write_n_allocated(s->async) >= bps)
|
2008-11-04 21:29:31 -07:00
|
|
|
mask |= POLLOUT | POLLWRNORM;
|
|
|
|
}
|
|
|
|
|
2012-12-19 15:39:44 -07:00
|
|
|
done:
|
2008-11-04 21:29:31 -07:00
|
|
|
mutex_unlock(&dev->mutex);
|
|
|
|
return mask;
|
|
|
|
}
|
|
|
|
|
2010-05-03 17:32:28 -06:00
|
|
|
static ssize_t comedi_write(struct file *file, const char __user *buf,
|
|
|
|
size_t nbytes, loff_t *offset)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2009-03-16 20:05:14 -06:00
|
|
|
struct comedi_subdevice *s;
|
2009-03-16 20:05:20 -06:00
|
|
|
struct comedi_async *async;
|
2008-11-04 21:29:31 -07:00
|
|
|
int n, m, count = 0, retval = 0;
|
|
|
|
DECLARE_WAITQUEUE(wait, current);
|
2013-02-27 14:59:05 -07:00
|
|
|
const unsigned minor = iminor(file_inode(file));
|
2012-12-19 15:38:30 -07:00
|
|
|
struct comedi_file_info *info = comedi_file_info_from_minor(minor);
|
2013-01-08 06:27:48 -07:00
|
|
|
struct comedi_device *dev = comedi_dev_from_file_info(info);
|
2011-11-08 14:23:03 -07:00
|
|
|
|
2012-12-19 15:40:34 -07:00
|
|
|
if (!dev)
|
2011-12-14 06:23:24 -07:00
|
|
|
return -ENODEV;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
if (!dev->attached) {
|
|
|
|
DPRINTK("no driver configured on comedi%i\n", dev->minor);
|
2012-12-19 15:40:34 -07:00
|
|
|
return -ENODEV;
|
2008-11-04 21:29:31 -07:00
|
|
|
}
|
|
|
|
|
2012-12-19 15:38:53 -07:00
|
|
|
s = comedi_write_subdevice(info);
|
2013-02-05 05:50:40 -07:00
|
|
|
if (!s || !s->async)
|
2012-12-19 15:40:34 -07:00
|
|
|
return -EIO;
|
|
|
|
|
2008-11-04 21:29:31 -07:00
|
|
|
async = s->async;
|
|
|
|
|
2012-12-19 15:40:34 -07:00
|
|
|
if (!s->busy || !nbytes)
|
|
|
|
return 0;
|
|
|
|
if (s->busy != file)
|
|
|
|
return -EACCES;
|
|
|
|
|
2008-11-04 21:29:31 -07:00
|
|
|
add_wait_queue(&async->wait_head, &wait);
|
|
|
|
while (nbytes > 0 && !retval) {
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
|
2012-12-19 15:43:18 -07:00
|
|
|
if (!comedi_is_subdevice_running(s)) {
|
2010-05-19 10:22:41 -06:00
|
|
|
if (count == 0) {
|
2012-12-19 15:44:02 -07:00
|
|
|
if (comedi_is_subdevice_in_error(s))
|
2010-05-19 10:22:41 -06:00
|
|
|
retval = -EPIPE;
|
2012-12-19 15:44:02 -07:00
|
|
|
else
|
2010-05-19 10:22:41 -06:00
|
|
|
retval = 0;
|
|
|
|
do_become_nonbusy(dev, s);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2008-11-04 21:29:31 -07:00
|
|
|
n = nbytes;
|
|
|
|
|
|
|
|
m = n;
|
2008-11-13 18:05:58 -07:00
|
|
|
if (async->buf_write_ptr + m > async->prealloc_bufsz)
|
2008-11-04 21:29:31 -07:00
|
|
|
m = async->prealloc_bufsz - async->buf_write_ptr;
|
|
|
|
comedi_buf_write_alloc(async, async->prealloc_bufsz);
|
2008-11-13 18:05:58 -07:00
|
|
|
if (m > comedi_buf_write_n_allocated(async))
|
2008-11-04 21:29:31 -07:00
|
|
|
m = comedi_buf_write_n_allocated(async);
|
|
|
|
if (m < n)
|
|
|
|
n = m;
|
|
|
|
|
|
|
|
if (n == 0) {
|
|
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
|
|
retval = -EAGAIN;
|
|
|
|
break;
|
|
|
|
}
|
2011-10-29 01:47:39 -06:00
|
|
|
schedule();
|
2008-11-04 21:29:31 -07:00
|
|
|
if (signal_pending(current)) {
|
|
|
|
retval = -ERESTARTSYS;
|
|
|
|
break;
|
|
|
|
}
|
2008-11-13 18:05:58 -07:00
|
|
|
if (!s->busy)
|
2008-11-04 21:29:31 -07:00
|
|
|
break;
|
|
|
|
if (s->busy != file) {
|
|
|
|
retval = -EACCES;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
m = copy_from_user(async->prealloc_buf + async->buf_write_ptr,
|
2008-11-13 18:05:58 -07:00
|
|
|
buf, n);
|
2008-11-04 21:29:31 -07:00
|
|
|
if (m) {
|
|
|
|
n -= m;
|
|
|
|
retval = -EFAULT;
|
|
|
|
}
|
|
|
|
comedi_buf_write_free(async, n);
|
|
|
|
|
|
|
|
count += n;
|
|
|
|
nbytes -= n;
|
|
|
|
|
|
|
|
buf += n;
|
|
|
|
break; /* makes device work like a pipe */
|
|
|
|
}
|
|
|
|
set_current_state(TASK_RUNNING);
|
|
|
|
remove_wait_queue(&async->wait_head, &wait);
|
|
|
|
|
2008-11-13 18:05:58 -07:00
|
|
|
return count ? count : retval;
|
2008-11-04 21:29:31 -07:00
|
|
|
}
|
|
|
|
|
2010-05-03 17:32:28 -06:00
|
|
|
static ssize_t comedi_read(struct file *file, char __user *buf, size_t nbytes,
|
2010-02-26 02:14:55 -07:00
|
|
|
loff_t *offset)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2009-03-16 20:05:14 -06:00
|
|
|
struct comedi_subdevice *s;
|
2009-03-16 20:05:20 -06:00
|
|
|
struct comedi_async *async;
|
2008-11-04 21:29:31 -07:00
|
|
|
int n, m, count = 0, retval = 0;
|
|
|
|
DECLARE_WAITQUEUE(wait, current);
|
2013-02-27 14:59:05 -07:00
|
|
|
const unsigned minor = iminor(file_inode(file));
|
2012-12-19 15:38:30 -07:00
|
|
|
struct comedi_file_info *info = comedi_file_info_from_minor(minor);
|
2013-01-08 06:27:48 -07:00
|
|
|
struct comedi_device *dev = comedi_dev_from_file_info(info);
|
2011-11-08 14:23:03 -07:00
|
|
|
|
2012-12-19 15:40:08 -07:00
|
|
|
if (!dev)
|
2011-12-14 06:23:24 -07:00
|
|
|
return -ENODEV;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
if (!dev->attached) {
|
|
|
|
DPRINTK("no driver configured on comedi%i\n", dev->minor);
|
2012-12-19 15:40:08 -07:00
|
|
|
return -ENODEV;
|
2008-11-04 21:29:31 -07:00
|
|
|
}
|
|
|
|
|
2012-12-19 15:38:53 -07:00
|
|
|
s = comedi_read_subdevice(info);
|
2013-02-05 05:50:40 -07:00
|
|
|
if (!s || !s->async)
|
2012-12-19 15:40:08 -07:00
|
|
|
return -EIO;
|
|
|
|
|
2008-11-04 21:29:31 -07:00
|
|
|
async = s->async;
|
2012-12-19 15:40:08 -07:00
|
|
|
if (!s->busy || !nbytes)
|
|
|
|
return 0;
|
|
|
|
if (s->busy != file)
|
|
|
|
return -EACCES;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
add_wait_queue(&async->wait_head, &wait);
|
|
|
|
while (nbytes > 0 && !retval) {
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
|
|
|
|
n = nbytes;
|
|
|
|
|
|
|
|
m = comedi_buf_read_n_available(async);
|
2008-11-13 18:05:58 -07:00
|
|
|
/* printk("%d available\n",m); */
|
|
|
|
if (async->buf_read_ptr + m > async->prealloc_bufsz)
|
2008-11-04 21:29:31 -07:00
|
|
|
m = async->prealloc_bufsz - async->buf_read_ptr;
|
2008-11-13 18:05:58 -07:00
|
|
|
/* printk("%d contiguous\n",m); */
|
2008-11-04 21:29:31 -07:00
|
|
|
if (m < n)
|
|
|
|
n = m;
|
|
|
|
|
|
|
|
if (n == 0) {
|
2012-12-19 15:43:18 -07:00
|
|
|
if (!comedi_is_subdevice_running(s)) {
|
2008-11-04 21:29:31 -07:00
|
|
|
do_become_nonbusy(dev, s);
|
2012-12-19 15:44:02 -07:00
|
|
|
if (comedi_is_subdevice_in_error(s))
|
2008-11-04 21:29:31 -07:00
|
|
|
retval = -EPIPE;
|
2012-12-19 15:44:02 -07:00
|
|
|
else
|
2008-11-04 21:29:31 -07:00
|
|
|
retval = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
|
|
retval = -EAGAIN;
|
|
|
|
break;
|
|
|
|
}
|
2011-10-29 01:47:39 -06:00
|
|
|
schedule();
|
2008-11-04 21:29:31 -07:00
|
|
|
if (signal_pending(current)) {
|
|
|
|
retval = -ERESTARTSYS;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (!s->busy) {
|
|
|
|
retval = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (s->busy != file) {
|
|
|
|
retval = -EACCES;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
m = copy_to_user(buf, async->prealloc_buf +
|
2008-11-13 18:05:58 -07:00
|
|
|
async->buf_read_ptr, n);
|
2008-11-04 21:29:31 -07:00
|
|
|
if (m) {
|
|
|
|
n -= m;
|
|
|
|
retval = -EFAULT;
|
|
|
|
}
|
|
|
|
|
|
|
|
comedi_buf_read_alloc(async, n);
|
|
|
|
comedi_buf_read_free(async, n);
|
|
|
|
|
|
|
|
count += n;
|
|
|
|
nbytes -= n;
|
|
|
|
|
|
|
|
buf += n;
|
|
|
|
break; /* makes device work like a pipe */
|
|
|
|
}
|
2012-12-19 15:44:24 -07:00
|
|
|
if (comedi_is_subdevice_idle(s) &&
|
2008-11-13 18:05:58 -07:00
|
|
|
async->buf_read_count - async->buf_write_count == 0) {
|
2008-11-04 21:29:31 -07:00
|
|
|
do_become_nonbusy(dev, s);
|
|
|
|
}
|
|
|
|
set_current_state(TASK_RUNNING);
|
|
|
|
remove_wait_queue(&async->wait_head, &wait);
|
|
|
|
|
2008-11-13 18:05:58 -07:00
|
|
|
return count ? count : retval;
|
2008-11-04 21:29:31 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static int comedi_open(struct inode *inode, struct file *file)
|
|
|
|
{
|
|
|
|
const unsigned minor = iminor(inode);
|
2012-12-19 15:35:23 -07:00
|
|
|
struct comedi_device *dev = comedi_dev_from_minor(minor);
|
2009-02-09 09:51:38 -07:00
|
|
|
|
2012-12-19 15:35:23 -07:00
|
|
|
if (!dev) {
|
2008-11-04 21:29:31 -07:00
|
|
|
DPRINTK("invalid minor number\n");
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* This is slightly hacky, but we want module autoloading
|
|
|
|
* to work for root.
|
|
|
|
* case: user opens device, attached -> ok
|
|
|
|
* case: user opens device, unattached, in_request_module=0 -> autoload
|
|
|
|
* case: user opens device, unattached, in_request_module=1 -> fail
|
|
|
|
* case: root opens device, attached -> ok
|
|
|
|
* case: root opens device, unattached, in_request_module=1 -> ok
|
|
|
|
* (typically called from modprobe)
|
|
|
|
* case: root opens device, unattached, in_request_module=0 -> autoload
|
|
|
|
*
|
|
|
|
* The last could be changed to "-> ok", which would deny root
|
|
|
|
* autoloading.
|
|
|
|
*/
|
|
|
|
mutex_lock(&dev->mutex);
|
|
|
|
if (dev->attached)
|
|
|
|
goto ok;
|
2009-08-13 07:44:51 -06:00
|
|
|
if (!capable(CAP_NET_ADMIN) && dev->in_request_module) {
|
2008-11-04 21:29:31 -07:00
|
|
|
DPRINTK("in request module\n");
|
|
|
|
mutex_unlock(&dev->mutex);
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
2009-08-13 07:44:51 -06:00
|
|
|
if (capable(CAP_NET_ADMIN) && dev->in_request_module)
|
2008-11-04 21:29:31 -07:00
|
|
|
goto ok;
|
|
|
|
|
|
|
|
dev->in_request_module = 1;
|
|
|
|
|
|
|
|
#ifdef CONFIG_KMOD
|
|
|
|
mutex_unlock(&dev->mutex);
|
2009-02-09 09:32:12 -07:00
|
|
|
request_module("char-major-%i-%i", COMEDI_MAJOR, dev->minor);
|
2008-11-04 21:29:31 -07:00
|
|
|
mutex_lock(&dev->mutex);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
dev->in_request_module = 0;
|
|
|
|
|
2009-08-13 07:44:51 -06:00
|
|
|
if (!dev->attached && !capable(CAP_NET_ADMIN)) {
|
|
|
|
DPRINTK("not attached and not CAP_NET_ADMIN\n");
|
2008-11-04 21:29:31 -07:00
|
|
|
mutex_unlock(&dev->mutex);
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
ok:
|
|
|
|
__module_get(THIS_MODULE);
|
|
|
|
|
|
|
|
if (dev->attached) {
|
|
|
|
if (!try_module_get(dev->driver->module)) {
|
|
|
|
module_put(THIS_MODULE);
|
|
|
|
mutex_unlock(&dev->mutex);
|
|
|
|
return -ENOSYS;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-05-19 07:10:00 -06:00
|
|
|
if (dev->attached && dev->use_count == 0 && dev->open) {
|
|
|
|
int rc = dev->open(dev);
|
|
|
|
if (rc < 0) {
|
|
|
|
module_put(dev->driver->module);
|
|
|
|
module_put(THIS_MODULE);
|
|
|
|
mutex_unlock(&dev->mutex);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
}
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
dev->use_count++;
|
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
mutex_unlock(&dev->mutex);
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
return 0;
|
2008-11-04 21:29:31 -07:00
|
|
|
}
|
|
|
|
|
2012-12-19 15:31:57 -07:00
|
|
|
static int comedi_fasync(int fd, struct file *file, int on)
|
|
|
|
{
|
2013-02-27 14:59:05 -07:00
|
|
|
const unsigned minor = iminor(file_inode(file));
|
2012-12-19 15:35:23 -07:00
|
|
|
struct comedi_device *dev = comedi_dev_from_minor(minor);
|
2012-12-19 15:31:57 -07:00
|
|
|
|
2012-12-19 15:35:23 -07:00
|
|
|
if (!dev)
|
2012-12-19 15:31:57 -07:00
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
return fasync_helper(fd, file, on, &dev->async_queue);
|
|
|
|
}
|
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
static int comedi_close(struct inode *inode, struct file *file)
|
2008-11-04 21:29:31 -07:00
|
|
|
{
|
2012-05-09 10:20:08 -06:00
|
|
|
const unsigned minor = iminor(inode);
|
2012-12-19 15:35:23 -07:00
|
|
|
struct comedi_device *dev = comedi_dev_from_minor(minor);
|
2012-05-09 10:20:08 -06:00
|
|
|
struct comedi_subdevice *s = NULL;
|
2008-11-04 21:29:31 -07:00
|
|
|
int i;
|
|
|
|
|
2012-12-19 15:35:23 -07:00
|
|
|
if (!dev)
|
2012-05-09 10:20:08 -06:00
|
|
|
return -ENODEV;
|
2008-11-04 21:29:31 -07:00
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
mutex_lock(&dev->mutex);
|
|
|
|
|
|
|
|
if (dev->subdevices) {
|
|
|
|
for (i = 0; i < dev->n_subdevices; i++) {
|
2012-09-05 19:20:58 -06:00
|
|
|
s = &dev->subdevices[i];
|
2012-05-09 10:20:08 -06:00
|
|
|
|
|
|
|
if (s->busy == file)
|
|
|
|
do_cancel(dev, s);
|
|
|
|
if (s->lock == file)
|
|
|
|
s->lock = NULL;
|
|
|
|
}
|
2008-11-04 21:29:31 -07:00
|
|
|
}
|
2012-05-09 10:20:08 -06:00
|
|
|
if (dev->attached && dev->use_count == 1 && dev->close)
|
|
|
|
dev->close(dev);
|
|
|
|
|
|
|
|
module_put(THIS_MODULE);
|
|
|
|
if (dev->attached)
|
|
|
|
module_put(dev->driver->module);
|
|
|
|
|
|
|
|
dev->use_count--;
|
|
|
|
|
|
|
|
mutex_unlock(&dev->mutex);
|
|
|
|
|
|
|
|
if (file->f_flags & FASYNC)
|
|
|
|
comedi_fasync(-1, file, 0);
|
2008-11-04 21:29:31 -07:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-06-19 03:17:43 -06:00
|
|
|
static const struct file_operations comedi_fops = {
|
2012-05-09 10:20:08 -06:00
|
|
|
.owner = THIS_MODULE,
|
|
|
|
.unlocked_ioctl = comedi_unlocked_ioctl,
|
|
|
|
.compat_ioctl = comedi_compat_ioctl,
|
|
|
|
.open = comedi_open,
|
|
|
|
.release = comedi_close,
|
|
|
|
.read = comedi_read,
|
|
|
|
.write = comedi_write,
|
|
|
|
.mmap = comedi_mmap,
|
|
|
|
.poll = comedi_poll,
|
|
|
|
.fasync = comedi_fasync,
|
|
|
|
.llseek = noop_llseek,
|
|
|
|
};
|
|
|
|
|
2012-06-19 03:17:43 -06:00
|
|
|
static struct class *comedi_class;
|
2012-05-09 10:20:08 -06:00
|
|
|
static struct cdev comedi_cdev;
|
|
|
|
|
|
|
|
void comedi_error(const struct comedi_device *dev, const char *s)
|
|
|
|
{
|
2012-08-16 07:38:05 -06:00
|
|
|
dev_err(dev->class_dev, "%s: %s\n", dev->driver->driver_name, s);
|
2008-11-04 21:29:31 -07:00
|
|
|
}
|
2012-05-09 10:20:08 -06:00
|
|
|
EXPORT_SYMBOL(comedi_error);
|
2009-04-14 09:21:41 -06:00
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
void comedi_event(struct comedi_device *dev, struct comedi_subdevice *s)
|
2009-04-14 09:21:41 -06:00
|
|
|
{
|
2012-05-09 10:20:08 -06:00
|
|
|
struct comedi_async *async = s->async;
|
|
|
|
unsigned runflags = 0;
|
|
|
|
unsigned runflags_mask = 0;
|
2009-04-14 09:21:41 -06:00
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
/* DPRINTK("comedi_event 0x%x\n",mask); */
|
2009-04-14 09:21:41 -06:00
|
|
|
|
2012-12-19 15:43:18 -07:00
|
|
|
if (!comedi_is_subdevice_running(s))
|
2012-05-09 10:20:08 -06:00
|
|
|
return;
|
|
|
|
|
|
|
|
if (s->
|
|
|
|
async->events & (COMEDI_CB_EOA | COMEDI_CB_ERROR |
|
|
|
|
COMEDI_CB_OVERFLOW)) {
|
|
|
|
runflags_mask |= SRF_RUNNING;
|
2009-04-14 09:21:41 -06:00
|
|
|
}
|
2012-05-09 10:20:08 -06:00
|
|
|
/* remember if an error event has occurred, so an error
|
|
|
|
* can be returned the next time the user does a read() */
|
|
|
|
if (s->async->events & (COMEDI_CB_ERROR | COMEDI_CB_OVERFLOW)) {
|
|
|
|
runflags_mask |= SRF_ERROR;
|
|
|
|
runflags |= SRF_ERROR;
|
2009-04-14 09:21:41 -06:00
|
|
|
}
|
2012-05-09 10:20:08 -06:00
|
|
|
if (runflags_mask) {
|
|
|
|
/*sets SRF_ERROR and SRF_RUNNING together atomically */
|
|
|
|
comedi_set_subdevice_runflags(s, runflags_mask, runflags);
|
2009-04-14 09:21:41 -06:00
|
|
|
}
|
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
if (async->cb_mask & s->async->events) {
|
|
|
|
if (comedi_get_subdevice_runflags(s) & SRF_USER) {
|
|
|
|
wake_up_interruptible(&async->wait_head);
|
|
|
|
if (s->subdev_flags & SDF_CMD_READ)
|
|
|
|
kill_fasync(&dev->async_queue, SIGIO, POLL_IN);
|
|
|
|
if (s->subdev_flags & SDF_CMD_WRITE)
|
|
|
|
kill_fasync(&dev->async_queue, SIGIO, POLL_OUT);
|
|
|
|
} else {
|
|
|
|
if (async->cb_func)
|
|
|
|
async->cb_func(s->async->events, async->cb_arg);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
s->async->events = 0;
|
2009-04-14 09:21:41 -06:00
|
|
|
}
|
2012-05-09 10:20:08 -06:00
|
|
|
EXPORT_SYMBOL(comedi_event);
|
2009-04-14 09:21:41 -06:00
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
static void comedi_device_init(struct comedi_device *dev)
|
|
|
|
{
|
2012-12-19 15:42:02 -07:00
|
|
|
memset(dev, 0, sizeof(*dev));
|
2012-05-09 10:20:08 -06:00
|
|
|
spin_lock_init(&dev->spinlock);
|
|
|
|
mutex_init(&dev->mutex);
|
|
|
|
dev->minor = -1;
|
|
|
|
}
|
2009-04-14 09:21:41 -06:00
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
static void comedi_device_cleanup(struct comedi_device *dev)
|
2009-04-14 09:21:41 -06:00
|
|
|
{
|
2012-05-09 10:20:08 -06:00
|
|
|
if (dev == NULL)
|
|
|
|
return;
|
|
|
|
mutex_lock(&dev->mutex);
|
|
|
|
comedi_device_detach(dev);
|
|
|
|
mutex_unlock(&dev->mutex);
|
|
|
|
mutex_destroy(&dev->mutex);
|
|
|
|
}
|
|
|
|
|
|
|
|
int comedi_alloc_board_minor(struct device *hardware_device)
|
|
|
|
{
|
2012-12-19 15:38:02 -07:00
|
|
|
struct comedi_file_info *info;
|
2012-05-09 10:20:08 -06:00
|
|
|
struct device *csdev;
|
|
|
|
unsigned i;
|
|
|
|
|
2012-12-19 15:42:02 -07:00
|
|
|
info = kzalloc(sizeof(*info), GFP_KERNEL);
|
2012-05-09 10:20:08 -06:00
|
|
|
if (info == NULL)
|
|
|
|
return -ENOMEM;
|
|
|
|
info->device = kzalloc(sizeof(struct comedi_device), GFP_KERNEL);
|
|
|
|
if (info->device == NULL) {
|
|
|
|
kfree(info);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
info->hardware_device = hardware_device;
|
|
|
|
comedi_device_init(info->device);
|
|
|
|
spin_lock(&comedi_file_info_table_lock);
|
|
|
|
for (i = 0; i < COMEDI_NUM_BOARD_MINORS; ++i) {
|
|
|
|
if (comedi_file_info_table[i] == NULL) {
|
|
|
|
comedi_file_info_table[i] = info;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
spin_unlock(&comedi_file_info_table_lock);
|
|
|
|
if (i == COMEDI_NUM_BOARD_MINORS) {
|
|
|
|
comedi_device_cleanup(info->device);
|
|
|
|
kfree(info->device);
|
|
|
|
kfree(info);
|
2012-08-16 07:38:05 -06:00
|
|
|
pr_err("comedi: error: ran out of minor numbers for board device files.\n");
|
2012-05-09 10:20:08 -06:00
|
|
|
return -EBUSY;
|
|
|
|
}
|
|
|
|
info->device->minor = i;
|
|
|
|
csdev = device_create(comedi_class, hardware_device,
|
|
|
|
MKDEV(COMEDI_MAJOR, i), NULL, "comedi%i", i);
|
|
|
|
if (!IS_ERR(csdev))
|
|
|
|
info->device->class_dev = csdev;
|
|
|
|
dev_set_drvdata(csdev, info);
|
2009-04-14 09:21:41 -06:00
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
return i;
|
2009-04-14 09:21:41 -06:00
|
|
|
}
|
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
void comedi_free_board_minor(unsigned minor)
|
2009-04-14 09:21:41 -06:00
|
|
|
{
|
2012-12-19 15:38:02 -07:00
|
|
|
struct comedi_file_info *info;
|
2009-04-14 09:21:41 -06:00
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
BUG_ON(minor >= COMEDI_NUM_BOARD_MINORS);
|
|
|
|
spin_lock(&comedi_file_info_table_lock);
|
|
|
|
info = comedi_file_info_table[minor];
|
|
|
|
comedi_file_info_table[minor] = NULL;
|
|
|
|
spin_unlock(&comedi_file_info_table_lock);
|
2009-04-14 09:21:41 -06:00
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
if (info) {
|
|
|
|
struct comedi_device *dev = info->device;
|
|
|
|
if (dev) {
|
|
|
|
if (dev->class_dev) {
|
|
|
|
device_destroy(comedi_class,
|
|
|
|
MKDEV(COMEDI_MAJOR, dev->minor));
|
|
|
|
}
|
|
|
|
comedi_device_cleanup(dev);
|
|
|
|
kfree(dev);
|
|
|
|
}
|
|
|
|
kfree(info);
|
2009-04-14 09:21:41 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
int comedi_find_board_minor(struct device *hardware_device)
|
2009-04-14 09:21:41 -06:00
|
|
|
{
|
2012-05-09 10:20:08 -06:00
|
|
|
int minor;
|
2012-12-19 15:38:02 -07:00
|
|
|
struct comedi_file_info *info;
|
2009-04-14 09:21:41 -06:00
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
for (minor = 0; minor < COMEDI_NUM_BOARD_MINORS; minor++) {
|
|
|
|
spin_lock(&comedi_file_info_table_lock);
|
|
|
|
info = comedi_file_info_table[minor];
|
|
|
|
if (info && info->hardware_device == hardware_device) {
|
|
|
|
spin_unlock(&comedi_file_info_table_lock);
|
|
|
|
return minor;
|
|
|
|
}
|
|
|
|
spin_unlock(&comedi_file_info_table_lock);
|
2009-04-14 09:21:41 -06:00
|
|
|
}
|
2012-05-09 10:20:08 -06:00
|
|
|
return -ENODEV;
|
2009-04-14 09:21:41 -06:00
|
|
|
}
|
|
|
|
|
2013-02-01 03:20:30 -07:00
|
|
|
int comedi_alloc_subdevice_minor(struct comedi_subdevice *s)
|
2009-04-14 09:21:41 -06:00
|
|
|
{
|
2013-02-01 03:20:30 -07:00
|
|
|
struct comedi_device *dev = s->device;
|
2012-12-19 15:38:02 -07:00
|
|
|
struct comedi_file_info *info;
|
2012-05-09 10:20:08 -06:00
|
|
|
struct device *csdev;
|
|
|
|
unsigned i;
|
2009-04-14 09:21:41 -06:00
|
|
|
|
2012-12-19 15:45:34 -07:00
|
|
|
info = kzalloc(sizeof(*info), GFP_KERNEL);
|
|
|
|
if (!info)
|
2012-05-09 10:20:08 -06:00
|
|
|
return -ENOMEM;
|
|
|
|
info->device = dev;
|
2013-01-29 07:05:58 -07:00
|
|
|
if (s->subdev_flags & SDF_CMD_READ)
|
|
|
|
info->read_subdevice = s;
|
|
|
|
if (s->subdev_flags & SDF_CMD_WRITE)
|
|
|
|
info->write_subdevice = s;
|
2012-05-09 10:20:08 -06:00
|
|
|
spin_lock(&comedi_file_info_table_lock);
|
|
|
|
for (i = COMEDI_FIRST_SUBDEVICE_MINOR; i < COMEDI_NUM_MINORS; ++i) {
|
|
|
|
if (comedi_file_info_table[i] == NULL) {
|
|
|
|
comedi_file_info_table[i] = info;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
spin_unlock(&comedi_file_info_table_lock);
|
|
|
|
if (i == COMEDI_NUM_MINORS) {
|
|
|
|
kfree(info);
|
2013-02-07 09:03:01 -07:00
|
|
|
pr_err("comedi: error: ran out of minor numbers for subdevice files.\n");
|
2012-05-09 10:20:08 -06:00
|
|
|
return -EBUSY;
|
|
|
|
}
|
|
|
|
s->minor = i;
|
|
|
|
csdev = device_create(comedi_class, dev->class_dev,
|
|
|
|
MKDEV(COMEDI_MAJOR, i), NULL, "comedi%i_subd%i",
|
2012-12-19 17:27:02 -07:00
|
|
|
dev->minor, s->index);
|
2012-05-09 10:20:08 -06:00
|
|
|
if (!IS_ERR(csdev))
|
|
|
|
s->class_dev = csdev;
|
|
|
|
dev_set_drvdata(csdev, info);
|
2009-04-14 09:21:41 -06:00
|
|
|
|
2013-02-07 09:03:00 -07:00
|
|
|
return 0;
|
2009-04-14 09:21:41 -06:00
|
|
|
}
|
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
void comedi_free_subdevice_minor(struct comedi_subdevice *s)
|
2009-04-14 09:21:41 -06:00
|
|
|
{
|
2012-12-19 15:38:02 -07:00
|
|
|
struct comedi_file_info *info;
|
2009-04-14 09:21:41 -06:00
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
if (s == NULL)
|
|
|
|
return;
|
|
|
|
if (s->minor < 0)
|
|
|
|
return;
|
2009-04-14 09:21:41 -06:00
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
BUG_ON(s->minor >= COMEDI_NUM_MINORS);
|
|
|
|
BUG_ON(s->minor < COMEDI_FIRST_SUBDEVICE_MINOR);
|
2009-04-14 09:21:41 -06:00
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
spin_lock(&comedi_file_info_table_lock);
|
|
|
|
info = comedi_file_info_table[s->minor];
|
|
|
|
comedi_file_info_table[s->minor] = NULL;
|
|
|
|
spin_unlock(&comedi_file_info_table_lock);
|
2009-04-14 09:21:41 -06:00
|
|
|
|
2012-05-09 10:20:08 -06:00
|
|
|
if (s->class_dev) {
|
|
|
|
device_destroy(comedi_class, MKDEV(COMEDI_MAJOR, s->minor));
|
|
|
|
s->class_dev = NULL;
|
2009-04-14 09:21:41 -06:00
|
|
|
}
|
2012-05-09 10:20:08 -06:00
|
|
|
kfree(info);
|
2009-04-14 09:21:41 -06:00
|
|
|
}
|
2012-12-19 15:40:59 -07:00
|
|
|
|
2013-01-28 10:07:39 -07:00
|
|
|
static void comedi_cleanup_board_minors(void)
|
2012-12-19 15:41:42 -07:00
|
|
|
{
|
|
|
|
unsigned i;
|
|
|
|
|
2013-01-28 10:07:39 -07:00
|
|
|
for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++)
|
2012-12-19 15:41:42 -07:00
|
|
|
comedi_free_board_minor(i);
|
|
|
|
}
|
|
|
|
|
2012-12-19 15:41:19 -07:00
|
|
|
static int __init comedi_init(void)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
pr_info("comedi: version " COMEDI_RELEASE " - http://www.comedi.org\n");
|
|
|
|
|
|
|
|
if (comedi_num_legacy_minors < 0 ||
|
|
|
|
comedi_num_legacy_minors > COMEDI_NUM_BOARD_MINORS) {
|
|
|
|
pr_err("comedi: error: invalid value for module parameter \"comedi_num_legacy_minors\". Valid values are 0 through %i.\n",
|
|
|
|
COMEDI_NUM_BOARD_MINORS);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
memset(comedi_file_info_table, 0,
|
|
|
|
sizeof(struct comedi_file_info *) * COMEDI_NUM_MINORS);
|
|
|
|
|
|
|
|
retval = register_chrdev_region(MKDEV(COMEDI_MAJOR, 0),
|
|
|
|
COMEDI_NUM_MINORS, "comedi");
|
|
|
|
if (retval)
|
|
|
|
return -EIO;
|
|
|
|
cdev_init(&comedi_cdev, &comedi_fops);
|
|
|
|
comedi_cdev.owner = THIS_MODULE;
|
|
|
|
kobject_set_name(&comedi_cdev.kobj, "comedi");
|
|
|
|
if (cdev_add(&comedi_cdev, MKDEV(COMEDI_MAJOR, 0), COMEDI_NUM_MINORS)) {
|
|
|
|
unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0),
|
|
|
|
COMEDI_NUM_MINORS);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
comedi_class = class_create(THIS_MODULE, "comedi");
|
|
|
|
if (IS_ERR(comedi_class)) {
|
|
|
|
pr_err("comedi: failed to create class\n");
|
|
|
|
cdev_del(&comedi_cdev);
|
|
|
|
unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0),
|
|
|
|
COMEDI_NUM_MINORS);
|
|
|
|
return PTR_ERR(comedi_class);
|
|
|
|
}
|
|
|
|
|
|
|
|
comedi_class->dev_attrs = comedi_dev_attrs;
|
|
|
|
|
|
|
|
/* XXX requires /proc interface */
|
|
|
|
comedi_proc_init();
|
|
|
|
|
|
|
|
/* create devices files for legacy/manual use */
|
|
|
|
for (i = 0; i < comedi_num_legacy_minors; i++) {
|
|
|
|
int minor;
|
|
|
|
minor = comedi_alloc_board_minor(NULL);
|
|
|
|
if (minor < 0) {
|
2013-01-28 10:07:39 -07:00
|
|
|
comedi_cleanup_board_minors();
|
2012-12-19 15:41:19 -07:00
|
|
|
cdev_del(&comedi_cdev);
|
|
|
|
unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0),
|
|
|
|
COMEDI_NUM_MINORS);
|
|
|
|
return minor;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
module_init(comedi_init);
|
|
|
|
|
|
|
|
static void __exit comedi_cleanup(void)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
2013-01-28 10:07:39 -07:00
|
|
|
comedi_cleanup_board_minors();
|
2012-12-19 15:41:19 -07:00
|
|
|
for (i = 0; i < COMEDI_NUM_MINORS; ++i)
|
|
|
|
BUG_ON(comedi_file_info_table[i]);
|
|
|
|
|
|
|
|
class_destroy(comedi_class);
|
|
|
|
cdev_del(&comedi_cdev);
|
|
|
|
unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0), COMEDI_NUM_MINORS);
|
|
|
|
|
|
|
|
comedi_proc_cleanup();
|
|
|
|
}
|
|
|
|
module_exit(comedi_cleanup);
|
|
|
|
|
2012-12-19 15:40:59 -07:00
|
|
|
MODULE_AUTHOR("http://www.comedi.org");
|
|
|
|
MODULE_DESCRIPTION("Comedi core module");
|
|
|
|
MODULE_LICENSE("GPL");
|