Staging: comedi: add kcomedilib to the tree

This adds the kcomedilib module

From: David Schleef <ds@schleef.org>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Schleef 2008-11-14 15:58:23 -08:00 committed by Greg Kroah-Hartman
parent 02ebd471ea
commit b79a7a2089
7 changed files with 1199 additions and 0 deletions

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@ -1,6 +1,8 @@
obj-$(CONFIG_COMEDI) += comedi.o
obj-$(CONFIG_COMEDI_RT) += comedi_rt.o
obj-$(CONFIG_COMEDI) += kcomedilib/
comedi-objs := \
comedi_fops.o \
proc.o \

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obj-$(CONFIG_COMEDI) += kcomedilib.o
kcomedilib-objs := \
data.o \
ksyms.o \
dio.o \
kcomedilib_main.o \
get.o

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/*
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);
}

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/*
kcomedilib/dio.c
implements comedi_dio_*() 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 <linux/string.h>
int comedi_dio_config(comedi_t * dev, unsigned int subdev, unsigned int chan,
unsigned int io)
{
comedi_insn insn;
memset(&insn, 0, sizeof(insn));
insn.insn = INSN_CONFIG;
insn.n = 1;
insn.data = &io;
insn.subdev = subdev;
insn.chanspec = CR_PACK(chan, 0, 0);
return comedi_do_insn(dev, &insn);
}
int comedi_dio_read(comedi_t * dev, unsigned int subdev, unsigned int chan,
unsigned int *val)
{
comedi_insn insn;
memset(&insn, 0, sizeof(insn));
insn.insn = INSN_READ;
insn.n = 1;
insn.data = val;
insn.subdev = subdev;
insn.chanspec = CR_PACK(chan, 0, 0);
return comedi_do_insn(dev, &insn);
}
int comedi_dio_write(comedi_t * dev, unsigned int subdev, unsigned int chan,
unsigned int val)
{
comedi_insn insn;
memset(&insn, 0, sizeof(insn));
insn.insn = INSN_WRITE;
insn.n = 1;
insn.data = &val;
insn.subdev = subdev;
insn.chanspec = CR_PACK(chan, 0, 0);
return comedi_do_insn(dev, &insn);
}
int comedi_dio_bitfield(comedi_t * dev, unsigned int subdev, unsigned int mask,
unsigned int *bits)
{
comedi_insn insn;
lsampl_t data[2];
int ret;
memset(&insn, 0, sizeof(insn));
insn.insn = INSN_BITS;
insn.n = 2;
insn.data = data;
insn.subdev = subdev;
data[0] = mask;
data[1] = *bits;
ret = comedi_do_insn(dev, &insn);
*bits = data[1];
return ret;
}

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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(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;
}

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/*
kcomedilib/kcomedilib.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 <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/fcntl.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <asm/io.h>
#include "../comedi.h"
#include "../comedilib.h"
#include "../comedidev.h"
MODULE_AUTHOR("David Schleef <ds@schleef.org>");
MODULE_DESCRIPTION("Comedi kernel library");
MODULE_LICENSE("GPL");
comedi_t *comedi_open(const char *filename)
{
struct comedi_device_file_info *dev_file_info;
comedi_device *dev;
unsigned int minor;
if (strncmp(filename, "/dev/comedi", 11) != 0)
return NULL;
minor = simple_strtoul(filename + 11, NULL, 0);
if (minor >= COMEDI_NUM_BOARD_MINORS)
return NULL;
dev_file_info = comedi_get_device_file_info(minor);
if(dev_file_info == NULL)
return NULL;
dev = dev_file_info->device;
if(dev == NULL || !dev->attached)
return NULL;
if (!try_module_get(dev->driver->module))
return NULL;
return (comedi_t *) dev;
}
comedi_t *comedi_open_old(unsigned int minor)
{
struct comedi_device_file_info *dev_file_info;
comedi_device *dev;
if (minor >= COMEDI_NUM_MINORS)
return NULL;
dev_file_info = comedi_get_device_file_info(minor);
if(dev_file_info == NULL)
return NULL;
dev = dev_file_info->device;
if(dev == NULL || !dev->attached)
return NULL;
return (comedi_t *) dev;
}
int comedi_close(comedi_t * d)
{
comedi_device *dev = (comedi_device *) d;
module_put(dev->driver->module);
return 0;
}
int comedi_loglevel(int newlevel)
{
return 0;
}
void comedi_perror(const char *message)
{
rt_printk("%s: unknown error\n", message);
}
char *comedi_strerror(int err)
{
return "unknown error";
}
int comedi_fileno(comedi_t * d)
{
comedi_device *dev = (comedi_device *) d;
/* return something random */
return dev->minor;
}
int comedi_command(comedi_t * d, comedi_cmd * cmd)
{
comedi_device *dev = (comedi_device *) d;
comedi_subdevice *s;
comedi_async *async;
unsigned runflags;
if (cmd->subdev >= dev->n_subdevices)
return -ENODEV;
s = dev->subdevices + cmd->subdev;
if (s->type == COMEDI_SUBD_UNUSED)
return -EIO;
async = s->async;
if (async == NULL)
return -ENODEV;
if (s->busy)
return -EBUSY;
s->busy = d;
if (async->cb_mask & COMEDI_CB_EOS)
cmd->flags |= TRIG_WAKE_EOS;
async->cmd = *cmd;
runflags = SRF_RUNNING;
#ifdef CONFIG_COMEDI_RT
if (comedi_switch_to_rt(dev) == 0)
runflags |= SRF_RT;
#endif
comedi_set_subdevice_runflags(s, ~0, runflags);
comedi_reset_async_buf(async);
return s->do_cmd(dev, s);
}
int comedi_command_test(comedi_t * d, comedi_cmd * cmd)
{
comedi_device *dev = (comedi_device *) d;
comedi_subdevice *s;
if (cmd->subdev >= dev->n_subdevices)
return -ENODEV;
s = dev->subdevices + cmd->subdev;
if (s->type == COMEDI_SUBD_UNUSED)
return -EIO;
if (s->async == NULL)
return -ENODEV;
return s->do_cmdtest(dev, s, cmd);
}
/*
* COMEDI_INSN
* perform an instruction
*/
int comedi_do_insn(comedi_t * d, comedi_insn * insn)
{
comedi_device *dev = (comedi_device *) d;
comedi_subdevice *s;
int ret = 0;
if (insn->insn & INSN_MASK_SPECIAL) {
switch (insn->insn) {
case INSN_GTOD:
{
struct timeval tv;
do_gettimeofday(&tv);
insn->data[0] = tv.tv_sec;
insn->data[1] = tv.tv_usec;
ret = 2;
break;
}
case INSN_WAIT:
/* XXX isn't the value supposed to be nanosecs? */
if (insn->n != 1 || insn->data[0] >= 100) {
ret = -EINVAL;
break;
}
comedi_udelay(insn->data[0]);
ret = 1;
break;
case INSN_INTTRIG:
if (insn->n != 1) {
ret = -EINVAL;
break;
}
if (insn->subdev >= dev->n_subdevices) {
rt_printk("%d not usable subdevice\n",
insn->subdev);
ret = -EINVAL;
break;
}
s = dev->subdevices + insn->subdev;
if (!s->async) {
rt_printk("no async\n");
ret = -EINVAL;
break;
}
if (!s->async->inttrig) {
rt_printk("no inttrig\n");
ret = -EAGAIN;
break;
}
ret = s->async->inttrig(dev, s, insn->data[0]);
if (ret >= 0)
ret = 1;
break;
default:
ret = -EINVAL;
}
} else {
/* a subdevice instruction */
if (insn->subdev >= dev->n_subdevices) {
ret = -EINVAL;
goto error;
}
s = dev->subdevices + insn->subdev;
if (s->type == COMEDI_SUBD_UNUSED) {
rt_printk("%d not useable subdevice\n", insn->subdev);
ret = -EIO;
goto error;
}
/* XXX check lock */
if ((ret = check_chanlist(s, 1, &insn->chanspec)) < 0) {
rt_printk("bad chanspec\n");
ret = -EINVAL;
goto error;
}
if (s->busy) {
ret = -EBUSY;
goto error;
}
s->busy = d;
switch (insn->insn) {
case INSN_READ:
ret = s->insn_read(dev, s, insn, insn->data);
break;
case INSN_WRITE:
ret = s->insn_write(dev, s, insn, insn->data);
break;
case INSN_BITS:
ret = s->insn_bits(dev, s, insn, insn->data);
break;
case INSN_CONFIG:
/* XXX should check instruction length */
ret = s->insn_config(dev, s, insn, insn->data);
break;
default:
ret = -EINVAL;
break;
}
s->busy = NULL;
}
if (ret < 0)
goto error;
#if 0
/* XXX do we want this? -- abbotti #if'ed it out for now. */
if (ret != insn->n) {
rt_printk("BUG: result of insn != insn.n\n");
ret = -EINVAL;
goto error;
}
#endif
error:
return ret;
}
/*
COMEDI_LOCK
lock subdevice
arg:
subdevice number
reads:
none
writes:
none
necessary locking:
- ioctl/rt lock (this type)
- lock while subdevice busy
- lock while subdevice being programmed
*/
int comedi_lock(comedi_t * d, unsigned int subdevice)
{
comedi_device *dev = (comedi_device *) d;
comedi_subdevice *s;
unsigned long flags;
int ret = 0;
if (subdevice >= dev->n_subdevices) {
return -EINVAL;
}
s = dev->subdevices + subdevice;
comedi_spin_lock_irqsave(&s->spin_lock, flags);
if (s->busy) {
ret = -EBUSY;
} else {
if (s->lock) {
ret = -EBUSY;
} else {
s->lock = d;
}
}
comedi_spin_unlock_irqrestore(&s->spin_lock, flags);
return ret;
}
/*
COMEDI_UNLOCK
unlock subdevice
arg:
subdevice number
reads:
none
writes:
none
*/
int comedi_unlock(comedi_t * d, unsigned int subdevice)
{
comedi_device *dev = (comedi_device *) d;
comedi_subdevice *s;
unsigned long flags;
comedi_async *async;
int ret;
if (subdevice >= dev->n_subdevices) {
return -EINVAL;
}
s = dev->subdevices + subdevice;
async = s->async;
comedi_spin_lock_irqsave(&s->spin_lock, flags);
if (s->busy) {
ret = -EBUSY;
} else if (s->lock && s->lock != (void *)d) {
ret = -EACCES;
} else {
s->lock = NULL;
if (async) {
async->cb_mask = 0;
async->cb_func = NULL;
async->cb_arg = NULL;
}
ret = 0;
}
comedi_spin_unlock_irqrestore(&s->spin_lock, flags);
return ret;
}
/*
COMEDI_CANCEL
cancel acquisition ioctl
arg:
subdevice number
reads:
nothing
writes:
nothing
*/
int comedi_cancel(comedi_t * d, unsigned int subdevice)
{
comedi_device *dev = (comedi_device *) d;
comedi_subdevice *s;
int ret = 0;
if (subdevice >= dev->n_subdevices) {
return -EINVAL;
}
s = dev->subdevices + subdevice;
if (s->lock && s->lock != d)
return -EACCES;
#if 0
if (!s->busy)
return 0;
if (s->busy != d)
return -EBUSY;
#endif
if (!s->cancel || !s->async)
return -EINVAL;
if ((ret = s->cancel(dev, s)))
return ret;
#ifdef CONFIG_COMEDI_RT
if (comedi_get_subdevice_runflags(s) & SRF_RT) {
comedi_switch_to_non_rt(dev);
}
#endif
comedi_set_subdevice_runflags(s, SRF_RUNNING | SRF_RT, 0);
s->async->inttrig = NULL;
s->busy = NULL;
return 0;
}
/*
registration of callback functions
*/
int comedi_register_callback(comedi_t * d, unsigned int subdevice,
unsigned int mask, int (*cb) (unsigned int, void *), void *arg)
{
comedi_device *dev = (comedi_device *) d;
comedi_subdevice *s;
comedi_async *async;
if (subdevice >= dev->n_subdevices) {
return -EINVAL;
}
s = dev->subdevices + subdevice;
async = s->async;
if (s->type == COMEDI_SUBD_UNUSED || !async)
return -EIO;
/* are we locked? (ioctl lock) */
if (s->lock && s->lock != d)
return -EACCES;
/* are we busy? */
if (s->busy)
return -EBUSY;
if (!mask) {
async->cb_mask = 0;
async->cb_func = NULL;
async->cb_arg = NULL;
} else {
async->cb_mask = mask;
async->cb_func = cb;
async->cb_arg = arg;
}
return 0;
}
int comedi_poll(comedi_t * d, unsigned int subdevice)
{
comedi_device *dev = (comedi_device *) d;
comedi_subdevice *s = dev->subdevices;
comedi_async *async;
if (subdevice >= dev->n_subdevices) {
return -EINVAL;
}
s = dev->subdevices + subdevice;
async = s->async;
if (s->type == COMEDI_SUBD_UNUSED || !async)
return -EIO;
/* are we locked? (ioctl lock) */
if (s->lock && s->lock != d)
return -EACCES;
/* are we running? XXX wrong? */
if (!s->busy)
return -EIO;
return s->poll(dev, s);
}
/* WARNING: not portable */
int comedi_map(comedi_t * d, unsigned int subdevice, void *ptr)
{
comedi_device *dev = (comedi_device *) d;
comedi_subdevice *s;
if (subdevice >= dev->n_subdevices) {
return -EINVAL;
}
s = dev->subdevices + subdevice;
if (!s->async)
return -EINVAL;
if (ptr) {
*((void **)ptr) = s->async->prealloc_buf;
}
/* XXX no reference counting */
return 0;
}
/* WARNING: not portable */
int comedi_unmap(comedi_t * d, unsigned int subdevice)
{
comedi_device *dev = (comedi_device *) d;
comedi_subdevice *s;
if (subdevice >= dev->n_subdevices) {
return -EINVAL;
}
s = dev->subdevices + subdevice;
if (!s->async)
return -EINVAL;
/* XXX no reference counting */
return 0;
}

View file

@ -0,0 +1,144 @@
/*
comedi/kcomedilib/ksyms.c
a comedlib interface for kernel modules
COMEDI - Linux Control and Measurement Device Interface
Copyright (C) 1997-2001 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.
*/
#ifndef EXPORT_SYMTAB
#define EXPORT_SYMTAB
#endif
#include "../comedi.h"
#include "../comedilib.h"
#include "../comedidev.h"
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/fcntl.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <linux/slab.h>
#if LINUX_VERSION_CODE >= 0x020200
/* functions specific to kcomedilib */
EXPORT_SYMBOL(comedi_register_callback);
EXPORT_SYMBOL(comedi_get_krange);
EXPORT_SYMBOL(comedi_get_buf_head_pos);
EXPORT_SYMBOL(comedi_set_user_int_count);
EXPORT_SYMBOL(comedi_map);
EXPORT_SYMBOL(comedi_unmap);
/* This list comes from user-space comedilib, to show which
* functions are not ported yet. */
EXPORT_SYMBOL(comedi_open);
EXPORT_SYMBOL(comedi_close);
/* logging */
EXPORT_SYMBOL(comedi_loglevel);
EXPORT_SYMBOL(comedi_perror);
EXPORT_SYMBOL(comedi_strerror);
//EXPORT_SYMBOL(comedi_errno);
EXPORT_SYMBOL(comedi_fileno);
/* device queries */
EXPORT_SYMBOL(comedi_get_n_subdevices);
EXPORT_SYMBOL(comedi_get_version_code);
EXPORT_SYMBOL(comedi_get_driver_name);
EXPORT_SYMBOL(comedi_get_board_name);
/* subdevice queries */
EXPORT_SYMBOL(comedi_get_subdevice_type);
EXPORT_SYMBOL(comedi_find_subdevice_by_type);
EXPORT_SYMBOL(comedi_get_subdevice_flags);
EXPORT_SYMBOL(comedi_get_n_channels);
//EXPORT_SYMBOL(comedi_range_is_chan_specific);
//EXPORT_SYMBOL(comedi_maxdata_is_chan_specific);
/* channel queries */
EXPORT_SYMBOL(comedi_get_maxdata);
#ifdef KCOMEDILIB_DEPRECATED
EXPORT_SYMBOL(comedi_get_rangetype);
#endif
EXPORT_SYMBOL(comedi_get_n_ranges);
//EXPORT_SYMBOL(comedi_find_range);
/* buffer queries */
EXPORT_SYMBOL(comedi_get_buffer_size);
//EXPORT_SYMBOL(comedi_get_max_buffer_size);
//EXPORT_SYMBOL(comedi_set_buffer_size);
EXPORT_SYMBOL(comedi_get_buffer_contents);
EXPORT_SYMBOL(comedi_get_buffer_offset);
/* low-level stuff */
//EXPORT_SYMBOL(comedi_trigger);
//EXPORT_SYMBOL(comedi_do_insnlist);
EXPORT_SYMBOL(comedi_do_insn);
EXPORT_SYMBOL(comedi_lock);
EXPORT_SYMBOL(comedi_unlock);
/* physical units */
//EXPORT_SYMBOL(comedi_to_phys);
//EXPORT_SYMBOL(comedi_from_phys);
/* synchronous stuff */
EXPORT_SYMBOL(comedi_data_read);
EXPORT_SYMBOL(comedi_data_read_hint);
EXPORT_SYMBOL(comedi_data_read_delayed);
EXPORT_SYMBOL(comedi_data_write);
EXPORT_SYMBOL(comedi_dio_config);
EXPORT_SYMBOL(comedi_dio_read);
EXPORT_SYMBOL(comedi_dio_write);
EXPORT_SYMBOL(comedi_dio_bitfield);
/* slowly varying stuff */
//EXPORT_SYMBOL(comedi_sv_init);
//EXPORT_SYMBOL(comedi_sv_update);
//EXPORT_SYMBOL(comedi_sv_measure);
/* commands */
//EXPORT_SYMBOL(comedi_get_cmd_src_mask);
//EXPORT_SYMBOL(comedi_get_cmd_generic_timed);
EXPORT_SYMBOL(comedi_cancel);
EXPORT_SYMBOL(comedi_command);
EXPORT_SYMBOL(comedi_command_test);
EXPORT_SYMBOL(comedi_poll);
/* buffer configuration */
EXPORT_SYMBOL(comedi_mark_buffer_read);
EXPORT_SYMBOL(comedi_mark_buffer_written);
//EXPORT_SYMBOL(comedi_get_range);
EXPORT_SYMBOL(comedi_get_len_chanlist);
/* deprecated */
//EXPORT_SYMBOL(comedi_get_timer);
//EXPORT_SYMBOL(comedi_timed_1chan);
/* alpha */
//EXPORT_SYMBOL(comedi_set_global_oor_behavior);
#endif