1f6325d629
Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
295 lines
6.9 KiB
C
295 lines
6.9 KiB
C
/*
|
|
kcomedilib/get.c
|
|
a comedlib interface for kernel modules
|
|
|
|
COMEDI - Linux Control and Measurement Device Interface
|
|
Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
*/
|
|
|
|
#define __NO_VERSION__
|
|
#include "../comedi.h"
|
|
#include "../comedilib.h"
|
|
#include "../comedidev.h"
|
|
|
|
int comedi_get_n_subdevices(void *d)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
|
|
return dev->n_subdevices;
|
|
}
|
|
|
|
int comedi_get_version_code(void *d)
|
|
{
|
|
return COMEDI_VERSION_CODE;
|
|
}
|
|
|
|
const char *comedi_get_driver_name(void * d)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
|
|
return dev->driver->driver_name;
|
|
}
|
|
|
|
const char *comedi_get_board_name(void * d)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
|
|
return dev->board_name;
|
|
}
|
|
|
|
int comedi_get_subdevice_type(void *d, unsigned int subdevice)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
struct comedi_subdevice *s = dev->subdevices + subdevice;
|
|
|
|
return s->type;
|
|
}
|
|
|
|
unsigned int comedi_get_subdevice_flags(void *d, unsigned int subdevice)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
struct comedi_subdevice *s = dev->subdevices + subdevice;
|
|
|
|
return s->subdev_flags;
|
|
}
|
|
|
|
int comedi_find_subdevice_by_type(void *d, int type, unsigned int subd)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
|
|
if (subd > dev->n_subdevices)
|
|
return -ENODEV;
|
|
|
|
for (; subd < dev->n_subdevices; subd++) {
|
|
if (dev->subdevices[subd].type == type)
|
|
return subd;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
int comedi_get_n_channels(void *d, unsigned int subdevice)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
struct comedi_subdevice *s = dev->subdevices + subdevice;
|
|
|
|
return s->n_chan;
|
|
}
|
|
|
|
int comedi_get_len_chanlist(void *d, unsigned int subdevice)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
struct comedi_subdevice *s = dev->subdevices + subdevice;
|
|
|
|
return s->len_chanlist;
|
|
}
|
|
|
|
unsigned int comedi_get_maxdata(void *d, unsigned int subdevice,
|
|
unsigned int chan)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
struct comedi_subdevice *s = dev->subdevices + subdevice;
|
|
|
|
if (s->maxdata_list)
|
|
return s->maxdata_list[chan];
|
|
|
|
return s->maxdata;
|
|
}
|
|
|
|
#ifdef KCOMEDILIB_DEPRECATED
|
|
int comedi_get_rangetype(void *d, unsigned int subdevice,
|
|
unsigned int chan)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
struct comedi_subdevice *s = dev->subdevices + subdevice;
|
|
int ret;
|
|
|
|
if (s->range_table_list) {
|
|
ret = s->range_table_list[chan]->length;
|
|
} else {
|
|
ret = s->range_table->length;
|
|
}
|
|
|
|
ret = ret | (dev->minor << 28) | (subdevice << 24) | (chan << 16);
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
int comedi_get_n_ranges(void *d, unsigned int subdevice, unsigned int chan)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
struct comedi_subdevice *s = dev->subdevices + subdevice;
|
|
int ret;
|
|
|
|
if (s->range_table_list) {
|
|
ret = s->range_table_list[chan]->length;
|
|
} else {
|
|
ret = s->range_table->length;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* ALPHA (non-portable)
|
|
*/
|
|
int comedi_get_krange(void *d, unsigned int subdevice, unsigned int chan,
|
|
unsigned int range, struct comedi_krange *krange)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
struct comedi_subdevice *s = dev->subdevices + subdevice;
|
|
const struct comedi_lrange *lr;
|
|
|
|
if (s->range_table_list) {
|
|
lr = s->range_table_list[chan];
|
|
} else {
|
|
lr = s->range_table;
|
|
}
|
|
if (range >= lr->length)
|
|
return -EINVAL;
|
|
|
|
memcpy(krange, lr->range + range, sizeof(struct comedi_krange));
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* ALPHA (may be renamed)
|
|
*/
|
|
unsigned int comedi_get_buf_head_pos(void *d, unsigned int subdevice)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
struct comedi_subdevice *s = dev->subdevices + subdevice;
|
|
struct comedi_async *async;
|
|
|
|
async = s->async;
|
|
if (async == NULL)
|
|
return 0;
|
|
|
|
return async->buf_write_count;
|
|
}
|
|
|
|
int comedi_get_buffer_contents(void *d, unsigned int subdevice)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
struct comedi_subdevice *s = dev->subdevices + subdevice;
|
|
struct comedi_async *async;
|
|
unsigned int num_bytes;
|
|
|
|
if (subdevice >= dev->n_subdevices)
|
|
return -1;
|
|
async = s->async;
|
|
if (async == NULL)
|
|
return 0;
|
|
num_bytes = comedi_buf_read_n_available(s->async);
|
|
return num_bytes;
|
|
}
|
|
|
|
/*
|
|
* ALPHA
|
|
*/
|
|
int comedi_set_user_int_count(void *d, unsigned int subdevice,
|
|
unsigned int buf_user_count)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
struct comedi_subdevice *s = dev->subdevices + subdevice;
|
|
struct comedi_async *async;
|
|
int num_bytes;
|
|
|
|
async = s->async;
|
|
if (async == NULL)
|
|
return -1;
|
|
|
|
num_bytes = buf_user_count - async->buf_read_count;
|
|
if (num_bytes < 0)
|
|
return -1;
|
|
comedi_buf_read_alloc(async, num_bytes);
|
|
comedi_buf_read_free(async, num_bytes);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int comedi_mark_buffer_read(void *d, unsigned int subdevice,
|
|
unsigned int num_bytes)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
struct comedi_subdevice *s = dev->subdevices + subdevice;
|
|
struct comedi_async *async;
|
|
|
|
if (subdevice >= dev->n_subdevices)
|
|
return -1;
|
|
async = s->async;
|
|
if (async == NULL)
|
|
return -1;
|
|
|
|
comedi_buf_read_alloc(async, num_bytes);
|
|
comedi_buf_read_free(async, num_bytes);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int comedi_mark_buffer_written(void *d, unsigned int subdevice,
|
|
unsigned int num_bytes)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
struct comedi_subdevice *s = dev->subdevices + subdevice;
|
|
struct comedi_async *async;
|
|
int bytes_written;
|
|
|
|
if (subdevice >= dev->n_subdevices)
|
|
return -1;
|
|
async = s->async;
|
|
if (async == NULL)
|
|
return -1;
|
|
bytes_written = comedi_buf_write_alloc(async, num_bytes);
|
|
comedi_buf_write_free(async, bytes_written);
|
|
if (bytes_written != num_bytes)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
int comedi_get_buffer_size(void *d, unsigned int subdev)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
struct comedi_subdevice *s = dev->subdevices + subdev;
|
|
struct comedi_async *async;
|
|
|
|
if (subdev >= dev->n_subdevices)
|
|
return -1;
|
|
async = s->async;
|
|
if (async == NULL)
|
|
return 0;
|
|
|
|
return async->prealloc_bufsz;
|
|
}
|
|
|
|
int comedi_get_buffer_offset(void *d, unsigned int subdevice)
|
|
{
|
|
struct comedi_device *dev = (struct comedi_device *) d;
|
|
struct comedi_subdevice *s = dev->subdevices + subdevice;
|
|
struct comedi_async *async;
|
|
|
|
if (subdevice >= dev->n_subdevices)
|
|
return -1;
|
|
async = s->async;
|
|
if (async == NULL)
|
|
return 0;
|
|
|
|
return async->buf_read_ptr;
|
|
}
|