Staging: add comedi core

This adds the Comedi core to the staging tree.
This is a data acquision infrastructure for Linux, providing a common
interface for these types of drivers.

Taken directly from the comedi git tree, with only minor tweaks
by Greg to get it to build properly within the kernel tree.

From: David Schleef <ds@schleef.org>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Shawn Bohrer <shawn.bohrer@gmail.com>
Signed-off-by: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 100 insertions, 0 deletions

diff --git a/drivers/staging/comedi/proc.c b/drivers/staging/comedi/proc.c
new file mode 100644
index 00000000000..7db12ac0d28
--- /dev/null
+++ b/drivers/staging/comedi/proc.c
@@ -0,0 +1,100 @@
+/*
+    module/proc.c
+    /proc interface for comedi
+
+    COMEDI - Linux Control and Measurement Device Interface
+    Copyright (C) 1998 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.
+
+*/
+
+/*
+	This is some serious bloatware.
+
+	Taken from Dave A.'s PCL-711 driver, 'cuz I thought it
+	was cool.
+*/
+
+#define __NO_VERSION__
+#include "comedidev.h"
+#include <linux/proc_fs.h>
+//#include <linux/string.h>
+
+int comedi_read_procmem(char *buf, char **start, off_t offset, int len,
+	int *eof, void *data);
+
+extern comedi_driver *comedi_drivers;
+
+int comedi_read_procmem(char *buf, char **start, off_t offset, int len,
+	int *eof, void *data)
+{
+	int i;
+	int devices_q = 0;
+	int l = 0;
+	comedi_driver *driv;
+
+	l += sprintf(buf + l,
+		"comedi version " COMEDI_RELEASE "\n"
+		"format string: %s\n",
+		"\"%2d: %-20s %-20s %4d\",i,driver_name,board_name,n_subdevices");
+
+	for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) {
+		struct comedi_device_file_info *dev_file_info = comedi_get_device_file_info(i);
+		comedi_device *dev;
+
+		if(dev_file_info == NULL) continue;
+		dev = dev_file_info->device;
+
+		if (dev->attached) {
+			devices_q = 1;
+			l += sprintf(buf + l, "%2d: %-20s %-20s %4d\n",
+				i,
+				dev->driver->driver_name,
+				dev->board_name, dev->n_subdevices);
+		}
+	}
+	if (!devices_q) {
+		l += sprintf(buf + l, "no devices\n");
+	}
+
+	for (driv = comedi_drivers; driv; driv = driv->next) {
+		l += sprintf(buf + l, "%s:\n", driv->driver_name);
+		for (i = 0; i < driv->num_names; i++) {
+			l += sprintf(buf + l, " %s\n",
+				*(char **)((char *)driv->board_name +
+					i * driv->offset));
+		}
+		if (!driv->num_names) {
+			l += sprintf(buf + l, " %s\n", driv->driver_name);
+		}
+	}
+
+	return l;
+}
+
+void comedi_proc_init(void)
+{
+	struct proc_dir_entry *comedi_proc;
+
+	comedi_proc = create_proc_entry("comedi", S_IFREG | S_IRUGO, 0);
+	if (comedi_proc)
+		comedi_proc->read_proc = comedi_read_procmem;
+}
+
+void comedi_proc_cleanup(void)
+{
+	remove_proc_entry("comedi", 0);
+}