drivers/net/wimax/i2400m/sysfs.c

   1 /*
   2  * Intel Wireless WiMAX Connection 2400m
   3  * Sysfs interfaces to show driver and device information
   4  *
   5  *
   6  * Copyright (C) 2007 Intel Corporation <linux-wimax@intel.com>
   7  * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License version
  11  * 2 as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  * 02110-1301, USA.
  22  */
  23
  24 #include <linux/netdevice.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/spinlock.h>
  27 #include <linux/device.h>
  28 #include "i2400m.h"
  29
  30
  31 #define D_SUBMODULE sysfs
  32 #include "debug-levels.h"
  33
  34
  35 /*
  36  * Set the idle timeout (msecs)
  37  *
  38  * FIXME: eventually this should be a common WiMAX stack method, but
  39  * would like to wait to see how other devices manage it.
  40  */
  41 static
  42 ssize_t i2400m_idle_timeout_store(struct device *dev,
  43                                   struct device_attribute *attr,
  44                                   const char *buf, size_t size)
  45 {
  46         ssize_t result;
  47         struct i2400m *i2400m = net_dev_to_i2400m(to_net_dev(dev));
  48         unsigned val;
  49
  50         result = -EINVAL;
  51         if (sscanf(buf, "%u\n", &val) != 1)
  52                 goto error_no_unsigned;
  53         if (val != 0 && (val < 100 || val > 300000 || val % 100 != 0)) {
  54                 dev_err(dev, "idle_timeout: %u: invalid msecs specification; "
  55                         "valid values are 0, 100-300000 in 100 increments\n",
  56                         val);
  57                 goto error_bad_value;
  58         }
  59         result = i2400m_set_idle_timeout(i2400m, val);
  60         if (result >= 0)
  61                 result = size;
  62 error_no_unsigned:
  63 error_bad_value:
  64         return result;
  65 }
  66
  67 static
  68 DEVICE_ATTR(i2400m_idle_timeout, S_IWUSR,
  69             NULL, i2400m_idle_timeout_store);
  70
  71 static
  72 struct attribute *i2400m_dev_attrs[] = {
  73         &dev_attr_i2400m_idle_timeout.attr,
  74         NULL,
  75 };
  76
  77 struct attribute_group i2400m_dev_attr_group = {
  78         .name = NULL,           /* we want them in the same directory */
  79         .attrs = i2400m_dev_attrs,
  80 };