David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 1 | /* |
Michael Welling | 6f2c9ef | 2014-03-18 02:14:20 -0500 | [diff] [blame] | 2 | * /proc interface for comedi |
| 3 | * |
| 4 | * COMEDI - Linux Control and Measurement Device Interface |
| 5 | * Copyright (C) 1998 David A. Schleef <ds@schleef.org> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 17 | |
| 18 | /* |
Michael Welling | 6f2c9ef | 2014-03-18 02:14:20 -0500 | [diff] [blame] | 19 | * This is some serious bloatware. |
| 20 | * |
| 21 | * Taken from Dave A.'s PCL-711 driver, 'cuz I thought it |
| 22 | * was cool. |
| 23 | */ |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 24 | |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 25 | #include "comedidev.h" |
Ian Abbott | f286766 | 2012-06-19 10:17:46 +0100 | [diff] [blame] | 26 | #include "comedi_internal.h" |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 27 | #include <linux/proc_fs.h> |
David Howells | 1f817b8 | 2013-04-08 16:39:33 +0100 | [diff] [blame] | 28 | #include <linux/seq_file.h> |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 29 | |
David Howells | 1f817b8 | 2013-04-08 16:39:33 +0100 | [diff] [blame] | 30 | static int comedi_read(struct seq_file *m, void *v) |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 31 | { |
| 32 | int i; |
| 33 | int devices_q = 0; |
Bill Pemberton | 139dfbd | 2009-03-16 22:05:25 -0400 | [diff] [blame] | 34 | struct comedi_driver *driv; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 35 | |
Michael Welling | 6f2c9ef | 2014-03-18 02:14:20 -0500 | [diff] [blame] | 36 | seq_printf(m, "comedi version " COMEDI_RELEASE "\nformat string: %s\n", |
| 37 | "\"%2d: %-20s %-20s %4d\", i, driver_name, board_name, n_subdevices"); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 38 | |
| 39 | for (i = 0; i < COMEDI_NUM_BOARD_MINORS; i++) { |
Ian Abbott | 616a354 | 2013-11-08 15:03:36 +0000 | [diff] [blame] | 40 | struct comedi_device *dev = comedi_dev_get_from_minor(i); |
| 41 | |
H Hartley Sweeten | 4da5fa9 | 2012-12-19 15:35:23 -0700 | [diff] [blame] | 42 | if (!dev) |
Bill Pemberton | c742740 | 2009-03-16 22:03:56 -0400 | [diff] [blame] | 43 | continue; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 44 | |
Ian Abbott | 616a354 | 2013-11-08 15:03:36 +0000 | [diff] [blame] | 45 | down_read(&dev->attach_lock); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 46 | if (dev->attached) { |
| 47 | devices_q = 1; |
David Howells | 1f817b8 | 2013-04-08 16:39:33 +0100 | [diff] [blame] | 48 | seq_printf(m, "%2d: %-20s %-20s %4d\n", |
| 49 | i, dev->driver->driver_name, |
| 50 | dev->board_name, dev->n_subdevices); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 51 | } |
Ian Abbott | 616a354 | 2013-11-08 15:03:36 +0000 | [diff] [blame] | 52 | up_read(&dev->attach_lock); |
| 53 | comedi_dev_put(dev); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 54 | } |
Bill Pemberton | 82675f3 | 2009-03-16 22:04:23 -0400 | [diff] [blame] | 55 | if (!devices_q) |
David Howells | 1f817b8 | 2013-04-08 16:39:33 +0100 | [diff] [blame] | 56 | seq_puts(m, "no devices\n"); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 57 | |
Ian Abbott | c383e2d | 2013-06-27 14:50:58 +0100 | [diff] [blame] | 58 | mutex_lock(&comedi_drivers_list_lock); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 59 | for (driv = comedi_drivers; driv; driv = driv->next) { |
David Howells | 1f817b8 | 2013-04-08 16:39:33 +0100 | [diff] [blame] | 60 | seq_printf(m, "%s:\n", driv->driver_name); |
| 61 | for (i = 0; i < driv->num_names; i++) |
| 62 | seq_printf(m, " %s\n", |
| 63 | *(char **)((char *)driv->board_name + |
| 64 | i * driv->offset)); |
| 65 | |
Bill Pemberton | 82675f3 | 2009-03-16 22:04:23 -0400 | [diff] [blame] | 66 | if (!driv->num_names) |
David Howells | 1f817b8 | 2013-04-08 16:39:33 +0100 | [diff] [blame] | 67 | seq_printf(m, " %s\n", driv->driver_name); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 68 | } |
Ian Abbott | c383e2d | 2013-06-27 14:50:58 +0100 | [diff] [blame] | 69 | mutex_unlock(&comedi_drivers_list_lock); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 70 | |
David Howells | 1f817b8 | 2013-04-08 16:39:33 +0100 | [diff] [blame] | 71 | return 0; |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 72 | } |
| 73 | |
David Howells | 1f817b8 | 2013-04-08 16:39:33 +0100 | [diff] [blame] | 74 | /* |
| 75 | * seq_file wrappers for procfile show routines. |
| 76 | */ |
| 77 | static int comedi_proc_open(struct inode *inode, struct file *file) |
| 78 | { |
| 79 | return single_open(file, comedi_read, NULL); |
| 80 | } |
| 81 | |
| 82 | static const struct file_operations comedi_proc_fops = { |
| 83 | .open = comedi_proc_open, |
| 84 | .read = seq_read, |
| 85 | .llseek = seq_lseek, |
Al Viro | bae301d | 2013-05-05 00:15:43 -0400 | [diff] [blame] | 86 | .release = single_release, |
David Howells | 1f817b8 | 2013-04-08 16:39:33 +0100 | [diff] [blame] | 87 | }; |
| 88 | |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 89 | void comedi_proc_init(void) |
| 90 | { |
David Howells | 1f817b8 | 2013-04-08 16:39:33 +0100 | [diff] [blame] | 91 | proc_create("comedi", 0644, NULL, &comedi_proc_fops); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | void comedi_proc_cleanup(void) |
| 95 | { |
Greg Kroah-Hartman | 22d1142 | 2010-05-03 15:32:04 -0700 | [diff] [blame] | 96 | remove_proc_entry("comedi", NULL); |
David Schleef | ed9eccb | 2008-11-04 20:29:31 -0800 | [diff] [blame] | 97 | } |