Initial file dump from open source releaseHEADmaster

1 files changed, 194 insertions, 0 deletions

diff --git a/drivers/staging/comedi/kcomedilib/kcomedilib_main.c b/drivers/staging/comedi/kcomedilib/kcomedilib_main.c
new file mode 100644
index 00000000..3231a483
--- /dev/null
+++ b/drivers/staging/comedi/kcomedilib/kcomedilib_main.c
@@ -0,0 +1,194 @@
+/*
+    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.
+
+*/
+
+#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/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");
+
+struct comedi_device *comedi_open(const char *filename)
+{
+	struct 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 = comedi_dev_from_minor(minor);
+
+	if (!dev || !dev->attached)
+		return NULL;
+
+	if (!try_module_get(dev->driver->module))
+		return NULL;
+
+	return dev;
+}
+EXPORT_SYMBOL_GPL(comedi_open);
+
+int comedi_close(struct comedi_device *d)
+{
+	struct comedi_device *dev = (struct comedi_device *)d;
+
+	module_put(dev->driver->module);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(comedi_close);
+
+static int comedi_do_insn(struct comedi_device *dev,
+			  struct comedi_insn *insn,
+			  unsigned int *data)
+{
+	struct comedi_subdevice *s;
+	int ret = 0;
+
+	/* a subdevice instruction */
+	if (insn->subdev >= dev->n_subdevices) {
+		ret = -EINVAL;
+		goto error;
+	}
+	s = &dev->subdevices[insn->subdev];
+
+	if (s->type == COMEDI_SUBD_UNUSED) {
+		dev_err(dev->class_dev,
+			"%d not useable subdevice\n", insn->subdev);
+		ret = -EIO;
+		goto error;
+	}
+
+	/* XXX check lock */
+
+	ret = comedi_check_chanlist(s, 1, &insn->chanspec);
+	if (ret < 0) {
+		dev_err(dev->class_dev, "bad chanspec\n");
+		ret = -EINVAL;
+		goto error;
+	}
+
+	if (s->busy) {
+		ret = -EBUSY;
+		goto error;
+	}
+	s->busy = dev;
+
+	switch (insn->insn) {
+	case INSN_BITS:
+		ret = s->insn_bits(dev, s, insn, data);
+		break;
+	case INSN_CONFIG:
+		/* XXX should check instruction length */
+		ret = s->insn_config(dev, s, insn, data);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	s->busy = NULL;
+error:
+
+	return ret;
+}
+
+int comedi_dio_config(struct comedi_device *dev, unsigned int subdev,
+		      unsigned int chan, unsigned int io)
+{
+	struct comedi_insn insn;
+
+	memset(&insn, 0, sizeof(insn));
+	insn.insn = INSN_CONFIG;
+	insn.n = 1;
+	insn.subdev = subdev;
+	insn.chanspec = CR_PACK(chan, 0, 0);
+
+	return comedi_do_insn(dev, &insn, &io);
+}
+EXPORT_SYMBOL_GPL(comedi_dio_config);
+
+int comedi_dio_bitfield(struct comedi_device *dev, unsigned int subdev,
+			unsigned int mask, unsigned int *bits)
+{
+	struct comedi_insn insn;
+	unsigned int data[2];
+	int ret;
+
+	memset(&insn, 0, sizeof(insn));
+	insn.insn = INSN_BITS;
+	insn.n = 2;
+	insn.subdev = subdev;
+
+	data[0] = mask;
+	data[1] = *bits;
+
+	ret = comedi_do_insn(dev, &insn, data);
+
+	*bits = data[1];
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(comedi_dio_bitfield);
+
+int comedi_find_subdevice_by_type(struct comedi_device *dev, int type,
+				  unsigned int subd)
+{
+	struct comedi_subdevice *s;
+
+	if (subd > dev->n_subdevices)
+		return -ENODEV;
+
+	for (; subd < dev->n_subdevices; subd++) {
+		s = &dev->subdevices[subd];
+		if (s->type == type)
+			return subd;
+	}
+	return -1;
+}
+EXPORT_SYMBOL_GPL(comedi_find_subdevice_by_type);
+
+int comedi_get_n_channels(struct comedi_device *dev, unsigned int subdevice)
+{
+	struct comedi_subdevice *s = &dev->subdevices[subdevice];
+
+	return s->n_chan;
+}
+EXPORT_SYMBOL_GPL(comedi_get_n_channels);