LXR linux/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 */
  41static
  42ssize_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;
  62error_no_unsigned:
  63error_bad_value:
  64        return result;
  65}
  66
  67static
  68DEVICE_ATTR_WO(i2400m_idle_timeout);
  69
  70static
  71struct attribute *i2400m_dev_attrs[] = {
  72        &dev_attr_i2400m_idle_timeout.attr,
  73        NULL,
  74};
  75
  76struct attribute_group i2400m_dev_attr_group = {
  77        .name = NULL,           /* we want them in the same directory */
  78        .attrs = i2400m_dev_attrs,
  79};
  80