drivers/net/wireless/bcm43xx/bcm43xx_sysfs.c

   1 /*
   2
   3   Broadcom BCM43xx wireless driver
   4
   5   SYSFS support routines
   6
   7   Copyright (c) 2006 Michael Buesch <mbuesch@freenet.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_radio.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_sprom_show(struct device *dev,
  75                                        struct device_attribute *attr,
  76                                        char *buf)
  77 {
  78         struct bcm43xx_private *bcm = devattr_to_bcm(attr, attr_sprom);
  79         u16 *sprom;
  80         unsigned long flags;
  81         int i, err;
  82
  83         if (!capable(CAP_NET_ADMIN))
  84                 return -EPERM;
  85
  86         assert(BCM43xx_SPROM_SIZE * sizeof(u16) <= PAGE_SIZE);
  87         sprom = kmalloc(BCM43xx_SPROM_SIZE * sizeof(*sprom),
  88                         GFP_KERNEL);
  89         if (!sprom)
  90                 return -ENOMEM;
  91         bcm43xx_lock_mmio(bcm, flags);
  92         assert(bcm->initialized);
  93         err = bcm43xx_sprom_read(bcm, sprom);
  94         if (!err) {
  95                 for (i = 0; i < BCM43xx_SPROM_SIZE; i++) {
  96                         buf[i * 2] = sprom[i] & 0x00FF;
  97                         buf[i * 2 + 1] = (sprom[i] & 0xFF00) >> 8;
  98                 }
  99         }
 100         bcm43xx_unlock_mmio(bcm, flags);
 101         kfree(sprom);
 102
 103         return err ? err : BCM43xx_SPROM_SIZE * sizeof(u16);
 104 }
 105
 106 static ssize_t bcm43xx_attr_sprom_store(struct device *dev,
 107                                         struct device_attribute *attr,
 108                                         const char *buf, size_t count)
 109 {
 110         struct bcm43xx_private *bcm = devattr_to_bcm(attr, attr_sprom);
 111         u16 *sprom;
 112         unsigned long flags;
 113         int i, err;
 114
 115         if (!capable(CAP_NET_ADMIN))
 116                 return -EPERM;
 117
 118         if (count != BCM43xx_SPROM_SIZE * sizeof(u16))
 119                 return -EINVAL;
 120         sprom = kmalloc(BCM43xx_SPROM_SIZE * sizeof(*sprom),
 121                         GFP_KERNEL);
 122         if (!sprom)
 123                 return -ENOMEM;
 124         for (i = 0; i < BCM43xx_SPROM_SIZE; i++) {
 125                 sprom[i] = buf[i * 2] & 0xFF;
 126                 sprom[i] |= ((u16)(buf[i * 2 + 1] & 0xFF)) << 8;
 127         }
 128         bcm43xx_lock_mmio(bcm, flags);
 129         assert(bcm->initialized);
 130         err = bcm43xx_sprom_write(bcm, sprom);
 131         bcm43xx_unlock_mmio(bcm, flags);
 132         kfree(sprom);
 133
 134         return err ? err : count;
 135
 136 }
 137
 138 static ssize_t bcm43xx_attr_interfmode_show(struct device *dev,
 139                                             struct device_attribute *attr,
 140                                             char *buf)
 141 {
 142         struct bcm43xx_private *bcm = devattr_to_bcm(attr, attr_interfmode);
 143         unsigned long flags;
 144         int err;
 145         ssize_t count = 0;
 146
 147         if (!capable(CAP_NET_ADMIN))
 148                 return -EPERM;
 149
 150         bcm43xx_lock(bcm, flags);
 151         assert(bcm->initialized);
 152
 153         switch (bcm43xx_current_radio(bcm)->interfmode) {
 154         case BCM43xx_RADIO_INTERFMODE_NONE:
 155                 count = snprintf(buf, PAGE_SIZE, "0 (No Interference Mitigation)\n");
 156                 break;
 157         case BCM43xx_RADIO_INTERFMODE_NONWLAN:
 158                 count = snprintf(buf, PAGE_SIZE, "1 (Non-WLAN Interference Mitigation)\n");
 159                 break;
 160         case BCM43xx_RADIO_INTERFMODE_MANUALWLAN:
 161                 count = snprintf(buf, PAGE_SIZE, "2 (WLAN Interference Mitigation)\n");
 162                 break;
 163         default:
 164                 assert(0);
 165         }
 166         err = 0;
 167
 168         bcm43xx_unlock(bcm, flags);
 169
 170         return err ? err : count;
 171
 172 }
 173
 174 static ssize_t bcm43xx_attr_interfmode_store(struct device *dev,
 175                                              struct device_attribute *attr,
 176                                              const char *buf, size_t count)
 177 {
 178         struct bcm43xx_private *bcm = devattr_to_bcm(attr, attr_interfmode);
 179         unsigned long flags;
 180         int err;
 181         int mode;
 182
 183         if (!capable(CAP_NET_ADMIN))
 184                 return -EPERM;
 185
 186         mode = get_integer(buf, count);
 187         switch (mode) {
 188         case 0:
 189                 mode = BCM43xx_RADIO_INTERFMODE_NONE;
 190                 break;
 191         case 1:
 192                 mode = BCM43xx_RADIO_INTERFMODE_NONWLAN;
 193                 break;
 194         case 2:
 195                 mode = BCM43xx_RADIO_INTERFMODE_MANUALWLAN;
 196                 break;
 197         case 3:
 198                 mode = BCM43xx_RADIO_INTERFMODE_AUTOWLAN;
 199                 break;
 200         default:
 201                 return -EINVAL;
 202         }
 203
 204         bcm43xx_lock_mmio(bcm, flags);
 205         assert(bcm->initialized);
 206
 207         err = bcm43xx_radio_set_interference_mitigation(bcm, mode);
 208         if (err) {
 209                 printk(KERN_ERR PFX "Interference Mitigation not "
 210                                     "supported by device\n");
 211         }
 212
 213         bcm43xx_unlock_mmio(bcm, flags);
 214
 215         return err ? err : count;
 216 }
 217
 218 static ssize_t bcm43xx_attr_preamble_show(struct device *dev,
 219                                           struct device_attribute *attr,
 220                                           char *buf)
 221 {
 222         struct bcm43xx_private *bcm = devattr_to_bcm(attr, attr_preamble);
 223         unsigned long flags;
 224         int err;
 225         ssize_t count;
 226
 227         if (!capable(CAP_NET_ADMIN))
 228                 return -EPERM;
 229
 230         bcm43xx_lock(bcm, flags);
 231         assert(bcm->initialized);
 232
 233         if (bcm->short_preamble)
 234                 count = snprintf(buf, PAGE_SIZE, "1 (Short Preamble enabled)\n");
 235         else
 236                 count = snprintf(buf, PAGE_SIZE, "0 (Short Preamble disabled)\n");
 237
 238         err = 0;
 239         bcm43xx_unlock(bcm, flags);
 240
 241         return err ? err : count;
 242 }
 243
 244 static ssize_t bcm43xx_attr_preamble_store(struct device *dev,
 245                                            struct device_attribute *attr,
 246                                            const char *buf, size_t count)
 247 {
 248         struct bcm43xx_private *bcm = devattr_to_bcm(attr, attr_preamble);
 249         unsigned long flags;
 250         int err;
 251         int value;
 252
 253         if (!capable(CAP_NET_ADMIN))
 254                 return -EPERM;
 255
 256         value = get_boolean(buf, count);
 257         if (value < 0)
 258                 return value;
 259         bcm43xx_lock(bcm, flags);
 260         assert(bcm->initialized);
 261
 262         bcm->short_preamble = !!value;
 263
 264         err = 0;
 265         bcm43xx_unlock(bcm, flags);
 266
 267         return err ? err : count;
 268 }
 269
 270 int bcm43xx_sysfs_register(struct bcm43xx_private *bcm)
 271 {
 272         struct device *dev = &bcm->pci_dev->dev;
 273         struct bcm43xx_sysfs *sysfs = &bcm->sysfs;
 274         int err;
 275
 276         assert(bcm->initialized);
 277
 278         sysfs->attr_sprom.attr.name = "sprom";
 279         sysfs->attr_sprom.attr.owner = THIS_MODULE;
 280         sysfs->attr_sprom.attr.mode = 0600;
 281         sysfs->attr_sprom.show = bcm43xx_attr_sprom_show;
 282         sysfs->attr_sprom.store = bcm43xx_attr_sprom_store;
 283         err = device_create_file(dev, &sysfs->attr_sprom);
 284         if (err)
 285                 goto out;
 286
 287         sysfs->attr_interfmode.attr.name = "interference";
 288         sysfs->attr_interfmode.attr.owner = THIS_MODULE;
 289         sysfs->attr_interfmode.attr.mode = 0600;
 290         sysfs->attr_interfmode.show = bcm43xx_attr_interfmode_show;
 291         sysfs->attr_interfmode.store = bcm43xx_attr_interfmode_store;
 292         err = device_create_file(dev, &sysfs->attr_interfmode);
 293         if (err)
 294                 goto err_remove_sprom;
 295
 296         sysfs->attr_preamble.attr.name = "shortpreamble";
 297         sysfs->attr_preamble.attr.owner = THIS_MODULE;
 298         sysfs->attr_preamble.attr.mode = 0600;
 299         sysfs->attr_preamble.show = bcm43xx_attr_preamble_show;
 300         sysfs->attr_preamble.store = bcm43xx_attr_preamble_store;
 301         err = device_create_file(dev, &sysfs->attr_preamble);
 302         if (err)
 303                 goto err_remove_interfmode;
 304
 305 out:
 306         return err;
 307 err_remove_interfmode:
 308         device_remove_file(dev, &sysfs->attr_interfmode);
 309 err_remove_sprom:
 310         device_remove_file(dev, &sysfs->attr_sprom);
 311         goto out;
 312 }
 313
 314 void bcm43xx_sysfs_unregister(struct bcm43xx_private *bcm)
 315 {
 316         struct device *dev = &bcm->pci_dev->dev;
 317         struct bcm43xx_sysfs *sysfs = &bcm->sysfs;
 318
 319         device_remove_file(dev, &sysfs->attr_preamble);
 320         device_remove_file(dev, &sysfs->attr_interfmode);
 321         device_remove_file(dev, &sysfs->attr_sprom);
 322 }