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Diffstat (limited to 'drivers/comedi/proc.c')
-rw-r--r--drivers/comedi/proc.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/drivers/comedi/proc.c b/drivers/comedi/proc.c
new file mode 100644
index 000000000000..8bc8e42beb90
--- /dev/null
+++ b/drivers/comedi/proc.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * /proc interface for comedi
+ *
+ * COMEDI - Linux Control and Measurement Device Interface
+ * Copyright (C) 1998 David A. Schleef <ds@schleef.org>
+ */
+
+/*
+ * 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;
+}
+
+void __init comedi_proc_init(void)
+{
+ if (!proc_create_single("comedi", 0444, NULL, comedi_read))
+ pr_warn("comedi: unable to create proc entry\n");
+}
+
+void comedi_proc_cleanup(void)
+{
+ remove_proc_entry("comedi", NULL);
+}