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/*
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;
}
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