diff options
Diffstat (limited to 'drivers/staging/comedi/kcomedilib/data.c')
-rw-r--r-- | drivers/staging/comedi/kcomedilib/data.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/drivers/staging/comedi/kcomedilib/data.c b/drivers/staging/comedi/kcomedilib/data.c new file mode 100644 index 000000000000..79aec2041150 --- /dev/null +++ b/drivers/staging/comedi/kcomedilib/data.c @@ -0,0 +1,89 @@ +/* + kcomedilib/data.c + implements comedi_data_*() functions + + COMEDI - Linux Control and Measurement Device Interface + Copyright (C) 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. + +*/ + +#include "../comedi.h" +#include "../comedilib.h" +#include "../comedidev.h" /* for comedi_udelay() */ + +#include <linux/string.h> + +int comedi_data_write(comedi_t * dev, unsigned int subdev, unsigned int chan, + unsigned int range, unsigned int aref, lsampl_t data) +{ + comedi_insn insn; + + memset(&insn, 0, sizeof(insn)); + insn.insn = INSN_WRITE; + insn.n = 1; + insn.data = &data; + insn.subdev = subdev; + insn.chanspec = CR_PACK(chan, range, aref); + + return comedi_do_insn(dev, &insn); +} + +int comedi_data_read(comedi_t * dev, unsigned int subdev, unsigned int chan, + unsigned int range, unsigned int aref, lsampl_t * data) +{ + comedi_insn insn; + + memset(&insn, 0, sizeof(insn)); + insn.insn = INSN_READ; + insn.n = 1; + insn.data = data; + insn.subdev = subdev; + insn.chanspec = CR_PACK(chan, range, aref); + + return comedi_do_insn(dev, &insn); +} + +int comedi_data_read_hint(comedi_t * dev, unsigned int subdev, + unsigned int chan, unsigned int range, unsigned int aref) +{ + comedi_insn insn; + lsampl_t dummy_data; + + memset(&insn, 0, sizeof(insn)); + insn.insn = INSN_READ; + insn.n = 0; + insn.data = &dummy_data; + insn.subdev = subdev; + insn.chanspec = CR_PACK(chan, range, aref); + + return comedi_do_insn(dev, &insn); +} + +int comedi_data_read_delayed(comedi_t * dev, unsigned int subdev, + unsigned int chan, unsigned int range, unsigned int aref, + lsampl_t * data, unsigned int nano_sec) +{ + int retval; + + retval = comedi_data_read_hint(dev, subdev, chan, range, aref); + if (retval < 0) + return retval; + + comedi_udelay((nano_sec + 999) / 1000); + + return comedi_data_read(dev, subdev, chan, range, aref, data); +} |