diff options
Diffstat (limited to 'drivers/staging/comedi/kcomedilib/get.c')
| -rw-r--r-- | drivers/staging/comedi/kcomedilib/get.c | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/drivers/staging/comedi/kcomedilib/get.c b/drivers/staging/comedi/kcomedilib/get.c new file mode 100644 index 000000000000..2004ad4480c0 --- /dev/null +++ b/drivers/staging/comedi/kcomedilib/get.c @@ -0,0 +1,294 @@ +/* + 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(comedi_t * d) +{ + comedi_device *dev = (comedi_device *) d; + + return dev->n_subdevices; +} + +int comedi_get_version_code(comedi_t * d) +{ + return COMEDI_VERSION_CODE; +} + +const char *comedi_get_driver_name(comedi_t * d) +{ + comedi_device *dev = (comedi_device *) d; + + return dev->driver->driver_name; +} + +const char *comedi_get_board_name(comedi_t * d) +{ + comedi_device *dev = (comedi_device *) d; + + return dev->board_name; +} + +int comedi_get_subdevice_type(comedi_t * d, unsigned int subdevice) +{ + comedi_device *dev = (comedi_device *) d; + comedi_subdevice *s = dev->subdevices + subdevice; + + return s->type; +} + +unsigned int comedi_get_subdevice_flags(comedi_t * d, unsigned int subdevice) +{ + comedi_device *dev = (comedi_device *) d; + comedi_subdevice *s = dev->subdevices + subdevice; + + return s->subdev_flags; +} + +int comedi_find_subdevice_by_type(comedi_t * d, int type, unsigned int subd) +{ + comedi_device *dev = (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(comedi_t * d, unsigned int subdevice) +{ + comedi_device *dev = (comedi_device *) d; + comedi_subdevice *s = dev->subdevices + subdevice; + + return s->n_chan; +} + +int comedi_get_len_chanlist(comedi_t * d, unsigned int subdevice) +{ + comedi_device *dev = (comedi_device *) d; + comedi_subdevice *s = dev->subdevices + subdevice; + + return s->len_chanlist; +} + +lsampl_t comedi_get_maxdata(comedi_t * d, unsigned int subdevice, + unsigned int chan) +{ + comedi_device *dev = (comedi_device *) d; + 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(comedi_t * d, unsigned int subdevice, + unsigned int chan) +{ + comedi_device *dev = (comedi_device *) d; + 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(comedi_t * d, unsigned int subdevice, unsigned int chan) +{ + comedi_device *dev = (comedi_device *) d; + 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(comedi_t * d, unsigned int subdevice, unsigned int chan, + unsigned int range, comedi_krange * krange) +{ + comedi_device *dev = (comedi_device *) d; + comedi_subdevice *s = dev->subdevices + subdevice; + const 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(comedi_krange)); + + return 0; +} + +/* + * ALPHA (may be renamed) +*/ +unsigned int comedi_get_buf_head_pos(comedi_t * d, unsigned int subdevice) +{ + comedi_device *dev = (comedi_device *) d; + comedi_subdevice *s = dev->subdevices + subdevice; + comedi_async *async; + + async = s->async; + if (async == NULL) + return 0; + + return async->buf_write_count; +} + +int comedi_get_buffer_contents(comedi_t * d, unsigned int subdevice) +{ + comedi_device *dev = (comedi_device *) d; + comedi_subdevice *s = dev->subdevices + subdevice; + 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(comedi_t * d, unsigned int subdevice, + unsigned int buf_user_count) +{ + comedi_device *dev = (comedi_device *) d; + comedi_subdevice *s = dev->subdevices + subdevice; + 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(comedi_t * d, unsigned int subdevice, + unsigned int num_bytes) +{ + comedi_device *dev = (comedi_device *) d; + comedi_subdevice *s = dev->subdevices + subdevice; + 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(comedi_t * d, unsigned int subdevice, + unsigned int num_bytes) +{ + comedi_device *dev = (comedi_device *) d; + comedi_subdevice *s = dev->subdevices + subdevice; + 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(comedi_t * d, unsigned int subdev) +{ + comedi_device *dev = (comedi_device *) d; + comedi_subdevice *s = dev->subdevices + subdev; + 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(comedi_t * d, unsigned int subdevice) +{ + comedi_device *dev = (comedi_device *) d; + comedi_subdevice *s = dev->subdevices + subdevice; + comedi_async *async; + + if (subdevice >= dev->n_subdevices) + return -1; + async = s->async; + if (async == NULL) + return 0; + + return async->buf_read_ptr; +} |