Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / staging / comedi / proc.c

diff --git a/kernel/drivers/staging/comedi/proc.c b/kernel/drivers/staging/comedi/proc.c
new file mode 100644 (file)
index 0000000..91dea25
--- /dev/null
+++ b/kernel/drivers/staging/comedi/proc.c
@@ -0,0 +1,97 @@
+/*
+ * /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.
+ */
+
+/*
+ * This is some serious bloatware.
+ *
+ * Taken from Dave A.'s PCL-711 driver, 'cuz I thought it
+ * was cool.
+ */
+
+#include "comedidev.h"
+#include "comedi_internal.h"
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+static int comedi_read(struct seq_file *m, void *v)
+{
+       int i;
+       int devices_q = 0;
+       struct comedi_driver *driv;
+
+       seq_printf(m, "comedi version " COMEDI_RELEASE "\nformat 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 *dev = comedi_dev_get_from_minor(i);
+
+               if (!dev)
+                       continue;
+
+               down_read(&dev->attach_lock);
+               if (dev->attached) {
+                       devices_q = 1;
+                       seq_printf(m, "%2d: %-20s %-20s %4d\n",
+                                  i, dev->driver->driver_name,
+                                  dev->board_name, dev->n_subdevices);
+               }
+               up_read(&dev->attach_lock);
+               comedi_dev_put(dev);
+       }
+       if (!devices_q)
+               seq_puts(m, "no devices\n");
+
+       mutex_lock(&comedi_drivers_list_lock);
+       for (driv = comedi_drivers; driv; driv = driv->next) {
+               seq_printf(m, "%s:\n", driv->driver_name);
+               for (i = 0; i < driv->num_names; i++)
+                       seq_printf(m, " %s\n",
+                                  *(char **)((char *)driv->board_name +
+                                             i * driv->offset));
+
+               if (!driv->num_names)
+                       seq_printf(m, " %s\n", driv->driver_name);
+       }
+       mutex_unlock(&comedi_drivers_list_lock);
+
+       return 0;
+}
+
+/*
+ * seq_file wrappers for procfile show routines.
+ */
+static int comedi_proc_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, comedi_read, NULL);
+}
+
+static const struct file_operations comedi_proc_fops = {
+       .open           = comedi_proc_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+};
+
+void comedi_proc_init(void)
+{
+       proc_create("comedi", 0644, NULL, &comedi_proc_fops);
+}
+
+void comedi_proc_cleanup(void)
+{
+       remove_proc_entry("comedi", NULL);
+}