Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 | /*
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;
}
|