package/bcm43xx-mac80211/src/bcm43xx/bcm43xx_sysfs.c

   1 /*
   2
   3   Broadcom BCM43xx wireless driver
   4
   5   SYSFS support routines
   6
   7   Copyright (c) 2006 Michael Buesch <mb@bu3sch.de>
   8
   9   This program is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU General Public License as published by
  11   the Free Software Foundation; either version 2 of the License, or
  12   (at your option) any later version.
  13
  14   This program is distributed in the hope that it will be useful,
  15   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17   GNU General Public License for more details.
  18
  19   You should have received a copy of the GNU General Public License
  20   along with this program; see the file COPYING.  If not, write to
  21   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  22   Boston, MA 02110-1301, USA.
  23
  24 */
  25
  26 #include "bcm43xx_sysfs.h"
  27 #include "bcm43xx.h"
  28 #include "bcm43xx_main.h"
  29 #include "bcm43xx_phy.h"
  30
  31 #include <linux/capability.h>
  32
  33
  34 #define GENERIC_FILESIZE        64
  35
  36
  37 static int get_integer(const char *buf, size_t count)
  38 {
  39         char tmp[10 + 1] = { 0 };
  40         int ret = -EINVAL;
  41
  42         if (count == 0)
  43                 goto out;
  44         count = min(count, (size_t)10);
  45         memcpy(tmp, buf, count);
  46         ret = simple_strtol(tmp, NULL, 10);
  47 out:
  48         return ret;
  49 }
  50
  51 static int get_boolean(const char *buf, size_t count)
  52 {
  53         if (count != 0) {
  54                 if (buf[0] == '1')
  55                         return 1;
  56                 if (buf[0] == '0')
  57                         return 0;
  58                 if (count >= 4 && memcmp(buf, "true", 4) == 0)
  59                         return 1;
  60                 if (count >= 5 && memcmp(buf, "false", 5) == 0)
  61                         return 0;
  62                 if (count >= 3 && memcmp(buf, "yes", 3) == 0)
  63                         return 1;
  64                 if (count >= 2 && memcmp(buf, "no", 2) == 0)
  65                         return 0;
  66                 if (count >= 2 && memcmp(buf, "on", 2) == 0)
  67                         return 1;
  68                 if (count >= 3 && memcmp(buf, "off", 3) == 0)
  69                         return 0;
  70         }
  71         return -EINVAL;
  72 }
  73
  74 static ssize_t bcm43xx_attr_interfmode_show(struct device *dev,
  75                                             struct device_attribute *attr,
  76                                             char *buf)
  77 {
  78         struct bcm43xx_wldev *wldev = dev_to_bcm43xx_wldev(dev);
  79         ssize_t count = 0;
  80
  81         if (!capable(CAP_NET_ADMIN))
  82                 return -EPERM;
  83
  84         mutex_lock(&wldev->wl->mutex);
  85
  86         switch (wldev->phy.interfmode) {
  87         case BCM43xx_INTERFMODE_NONE:
  88                 count = snprintf(buf, PAGE_SIZE, "0 (No Interference Mitigation)\n");
  89                 break;
  90         case BCM43xx_INTERFMODE_NONWLAN:
  91                 count = snprintf(buf, PAGE_SIZE, "1 (Non-WLAN Interference Mitigation)\n");
  92                 break;
  93         case BCM43xx_INTERFMODE_MANUALWLAN:
  94                 count = snprintf(buf, PAGE_SIZE, "2 (WLAN Interference Mitigation)\n");
  95                 break;
  96         default:
  97                 assert(0);
  98         }
  99
 100         mutex_unlock(&wldev->wl->mutex);
 101
 102         return count;
 103 }
 104
 105 static ssize_t bcm43xx_attr_interfmode_store(struct device *dev,
 106                                              struct device_attribute *attr,
 107                                              const char *buf, size_t count)
 108 {
 109         struct bcm43xx_wldev *wldev = dev_to_bcm43xx_wldev(dev);
 110         unsigned long flags;
 111         int err;
 112         int mode;
 113
 114         if (!capable(CAP_NET_ADMIN))
 115                 return -EPERM;
 116
 117         mode = get_integer(buf, count);
 118         switch (mode) {
 119         case 0:
 120                 mode = BCM43xx_INTERFMODE_NONE;
 121                 break;
 122         case 1:
 123                 mode = BCM43xx_INTERFMODE_NONWLAN;
 124                 break;
 125         case 2:
 126                 mode = BCM43xx_INTERFMODE_MANUALWLAN;
 127                 break;
 128         case 3:
 129                 mode = BCM43xx_INTERFMODE_AUTOWLAN;
 130                 break;
 131         default:
 132                 return -EINVAL;
 133         }
 134
 135         mutex_lock(&wldev->wl->mutex);
 136         spin_lock_irqsave(&wldev->wl->irq_lock, flags);
 137
 138         err = bcm43xx_radio_set_interference_mitigation(wldev, mode);
 139         if (err) {
 140                 printk(KERN_ERR PFX "Interference Mitigation not "
 141                                     "supported by device\n");
 142         }
 143         mmiowb();
 144         spin_unlock_irqrestore(&wldev->wl->irq_lock, flags);
 145         mutex_unlock(&wldev->wl->mutex);
 146
 147         return err ? err : count;
 148 }
 149
 150 static DEVICE_ATTR(interference, 0644,
 151                    bcm43xx_attr_interfmode_show,
 152                    bcm43xx_attr_interfmode_store);
 153
 154 static ssize_t bcm43xx_attr_preamble_show(struct device *dev,
 155                                           struct device_attribute *attr,
 156                                           char *buf)
 157 {
 158         struct bcm43xx_wldev *wldev = dev_to_bcm43xx_wldev(dev);
 159         ssize_t count;
 160
 161         if (!capable(CAP_NET_ADMIN))
 162                 return -EPERM;
 163
 164         mutex_lock(&wldev->wl->mutex);
 165
 166         if (wldev->short_preamble)
 167                 count = snprintf(buf, PAGE_SIZE, "1 (Short Preamble enabled)\n");
 168         else
 169                 count = snprintf(buf, PAGE_SIZE, "0 (Short Preamble disabled)\n");
 170
 171         mutex_unlock(&wldev->wl->mutex);
 172
 173         return count;
 174 }
 175
 176 static ssize_t bcm43xx_attr_preamble_store(struct device *dev,
 177                                            struct device_attribute *attr,
 178                                            const char *buf, size_t count)
 179 {
 180         struct bcm43xx_wldev *wldev = dev_to_bcm43xx_wldev(dev);
 181         unsigned long flags;
 182         int value;
 183
 184         if (!capable(CAP_NET_ADMIN))
 185                 return -EPERM;
 186
 187         value = get_boolean(buf, count);
 188         if (value < 0)
 189                 return value;
 190         mutex_lock(&wldev->wl->mutex);
 191         spin_lock_irqsave(&wldev->wl->irq_lock, flags);
 192
 193         wldev->short_preamble = !!value;
 194
 195         spin_unlock_irqrestore(&wldev->wl->irq_lock, flags);
 196         mutex_unlock(&wldev->wl->mutex);
 197
 198         return count;
 199 }
 200
 201 static DEVICE_ATTR(shortpreamble, 0644,
 202                    bcm43xx_attr_preamble_show,
 203                    bcm43xx_attr_preamble_store);
 204
 205 int bcm43xx_sysfs_register(struct bcm43xx_wldev *wldev)
 206 {
 207         struct device *dev = wldev->dev->dev;
 208         int err;
 209
 210         assert(bcm43xx_status(wldev) == BCM43xx_STAT_INITIALIZED);
 211
 212         err = device_create_file(dev, &dev_attr_interference);
 213         if (err)
 214                 goto out;
 215         err = device_create_file(dev, &dev_attr_shortpreamble);
 216         if (err)
 217                 goto err_remove_interfmode;
 218
 219 out:
 220         return err;
 221 err_remove_interfmode:
 222         device_remove_file(dev, &dev_attr_interference);
 223         goto out;
 224 }
 225
 226 void bcm43xx_sysfs_unregister(struct bcm43xx_wldev *wldev)
 227 {
 228         struct device *dev = wldev->dev->dev;
 229
 230         device_remove_file(dev, &dev_attr_shortpreamble);
 231         device_remove_file(dev, &dev_attr_interference);
 232 }