Michael Buesch | e4d6b79 | 2007-09-18 15:39:42 -0400 | [diff] [blame] | 1 | /* |
| 2 | |
| 3 | Broadcom B43 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 | |
Geert Uytterhoeven | 50e36eb | 2007-10-13 14:31:30 +0200 | [diff] [blame] | 26 | #include <linux/capability.h> |
| 27 | #include <linux/io.h> |
| 28 | |
Michael Buesch | e4d6b79 | 2007-09-18 15:39:42 -0400 | [diff] [blame] | 29 | #include "b43.h" |
| 30 | #include "sysfs.h" |
| 31 | #include "main.h" |
| 32 | #include "phy.h" |
| 33 | |
Michael Buesch | e4d6b79 | 2007-09-18 15:39:42 -0400 | [diff] [blame] | 34 | #define GENERIC_FILESIZE 64 |
| 35 | |
| 36 | static int get_integer(const char *buf, size_t count) |
| 37 | { |
| 38 | char tmp[10 + 1] = { 0 }; |
| 39 | int ret = -EINVAL; |
| 40 | |
| 41 | if (count == 0) |
| 42 | goto out; |
| 43 | count = min(count, (size_t) 10); |
| 44 | memcpy(tmp, buf, count); |
| 45 | ret = simple_strtol(tmp, NULL, 10); |
| 46 | out: |
| 47 | return ret; |
| 48 | } |
| 49 | |
| 50 | static int get_boolean(const char *buf, size_t count) |
| 51 | { |
| 52 | if (count != 0) { |
| 53 | if (buf[0] == '1') |
| 54 | return 1; |
| 55 | if (buf[0] == '0') |
| 56 | return 0; |
| 57 | if (count >= 4 && memcmp(buf, "true", 4) == 0) |
| 58 | return 1; |
| 59 | if (count >= 5 && memcmp(buf, "false", 5) == 0) |
| 60 | return 0; |
| 61 | if (count >= 3 && memcmp(buf, "yes", 3) == 0) |
| 62 | return 1; |
| 63 | if (count >= 2 && memcmp(buf, "no", 2) == 0) |
| 64 | return 0; |
| 65 | if (count >= 2 && memcmp(buf, "on", 2) == 0) |
| 66 | return 1; |
| 67 | if (count >= 3 && memcmp(buf, "off", 3) == 0) |
| 68 | return 0; |
| 69 | } |
| 70 | return -EINVAL; |
| 71 | } |
| 72 | |
| 73 | static ssize_t b43_attr_interfmode_show(struct device *dev, |
| 74 | struct device_attribute *attr, |
| 75 | char *buf) |
| 76 | { |
| 77 | struct b43_wldev *wldev = dev_to_b43_wldev(dev); |
| 78 | ssize_t count = 0; |
| 79 | |
| 80 | if (!capable(CAP_NET_ADMIN)) |
| 81 | return -EPERM; |
| 82 | |
| 83 | mutex_lock(&wldev->wl->mutex); |
| 84 | |
| 85 | switch (wldev->phy.interfmode) { |
| 86 | case B43_INTERFMODE_NONE: |
| 87 | count = |
| 88 | snprintf(buf, PAGE_SIZE, |
| 89 | "0 (No Interference Mitigation)\n"); |
| 90 | break; |
| 91 | case B43_INTERFMODE_NONWLAN: |
| 92 | count = |
| 93 | snprintf(buf, PAGE_SIZE, |
| 94 | "1 (Non-WLAN Interference Mitigation)\n"); |
| 95 | break; |
| 96 | case B43_INTERFMODE_MANUALWLAN: |
| 97 | count = |
| 98 | snprintf(buf, PAGE_SIZE, |
| 99 | "2 (WLAN Interference Mitigation)\n"); |
| 100 | break; |
| 101 | default: |
| 102 | B43_WARN_ON(1); |
| 103 | } |
| 104 | |
| 105 | mutex_unlock(&wldev->wl->mutex); |
| 106 | |
| 107 | return count; |
| 108 | } |
| 109 | |
| 110 | static ssize_t b43_attr_interfmode_store(struct device *dev, |
| 111 | struct device_attribute *attr, |
| 112 | const char *buf, size_t count) |
| 113 | { |
| 114 | struct b43_wldev *wldev = dev_to_b43_wldev(dev); |
| 115 | unsigned long flags; |
| 116 | int err; |
| 117 | int mode; |
| 118 | |
| 119 | if (!capable(CAP_NET_ADMIN)) |
| 120 | return -EPERM; |
| 121 | |
| 122 | mode = get_integer(buf, count); |
| 123 | switch (mode) { |
| 124 | case 0: |
| 125 | mode = B43_INTERFMODE_NONE; |
| 126 | break; |
| 127 | case 1: |
| 128 | mode = B43_INTERFMODE_NONWLAN; |
| 129 | break; |
| 130 | case 2: |
| 131 | mode = B43_INTERFMODE_MANUALWLAN; |
| 132 | break; |
| 133 | case 3: |
| 134 | mode = B43_INTERFMODE_AUTOWLAN; |
| 135 | break; |
| 136 | default: |
| 137 | return -EINVAL; |
| 138 | } |
| 139 | |
| 140 | mutex_lock(&wldev->wl->mutex); |
| 141 | spin_lock_irqsave(&wldev->wl->irq_lock, flags); |
| 142 | |
| 143 | err = b43_radio_set_interference_mitigation(wldev, mode); |
| 144 | if (err) { |
| 145 | b43err(wldev->wl, "Interference Mitigation not " |
| 146 | "supported by device\n"); |
| 147 | } |
| 148 | mmiowb(); |
| 149 | spin_unlock_irqrestore(&wldev->wl->irq_lock, flags); |
| 150 | mutex_unlock(&wldev->wl->mutex); |
| 151 | |
| 152 | return err ? err : count; |
| 153 | } |
| 154 | |
| 155 | static DEVICE_ATTR(interference, 0644, |
| 156 | b43_attr_interfmode_show, b43_attr_interfmode_store); |
| 157 | |
| 158 | static ssize_t b43_attr_preamble_show(struct device *dev, |
| 159 | struct device_attribute *attr, char *buf) |
| 160 | { |
| 161 | struct b43_wldev *wldev = dev_to_b43_wldev(dev); |
| 162 | ssize_t count; |
| 163 | |
| 164 | if (!capable(CAP_NET_ADMIN)) |
| 165 | return -EPERM; |
| 166 | |
| 167 | mutex_lock(&wldev->wl->mutex); |
| 168 | |
| 169 | if (wldev->short_preamble) |
| 170 | count = |
| 171 | snprintf(buf, PAGE_SIZE, "1 (Short Preamble enabled)\n"); |
| 172 | else |
| 173 | count = |
| 174 | snprintf(buf, PAGE_SIZE, "0 (Short Preamble disabled)\n"); |
| 175 | |
| 176 | mutex_unlock(&wldev->wl->mutex); |
| 177 | |
| 178 | return count; |
| 179 | } |
| 180 | |
| 181 | static ssize_t b43_attr_preamble_store(struct device *dev, |
| 182 | struct device_attribute *attr, |
| 183 | const char *buf, size_t count) |
| 184 | { |
| 185 | struct b43_wldev *wldev = dev_to_b43_wldev(dev); |
| 186 | unsigned long flags; |
| 187 | int value; |
| 188 | |
| 189 | if (!capable(CAP_NET_ADMIN)) |
| 190 | return -EPERM; |
| 191 | |
| 192 | value = get_boolean(buf, count); |
| 193 | if (value < 0) |
| 194 | return value; |
| 195 | mutex_lock(&wldev->wl->mutex); |
| 196 | spin_lock_irqsave(&wldev->wl->irq_lock, flags); |
| 197 | |
| 198 | wldev->short_preamble = !!value; |
| 199 | |
| 200 | spin_unlock_irqrestore(&wldev->wl->irq_lock, flags); |
| 201 | mutex_unlock(&wldev->wl->mutex); |
| 202 | |
| 203 | return count; |
| 204 | } |
| 205 | |
| 206 | static DEVICE_ATTR(shortpreamble, 0644, |
| 207 | b43_attr_preamble_show, b43_attr_preamble_store); |
| 208 | |
| 209 | int b43_sysfs_register(struct b43_wldev *wldev) |
| 210 | { |
| 211 | struct device *dev = wldev->dev->dev; |
| 212 | int err; |
| 213 | |
| 214 | B43_WARN_ON(b43_status(wldev) != B43_STAT_INITIALIZED); |
| 215 | |
| 216 | err = device_create_file(dev, &dev_attr_interference); |
| 217 | if (err) |
| 218 | goto out; |
| 219 | err = device_create_file(dev, &dev_attr_shortpreamble); |
| 220 | if (err) |
| 221 | goto err_remove_interfmode; |
| 222 | |
| 223 | out: |
| 224 | return err; |
| 225 | err_remove_interfmode: |
| 226 | device_remove_file(dev, &dev_attr_interference); |
| 227 | goto out; |
| 228 | } |
| 229 | |
| 230 | void b43_sysfs_unregister(struct b43_wldev *wldev) |
| 231 | { |
| 232 | struct device *dev = wldev->dev->dev; |
| 233 | |
| 234 | device_remove_file(dev, &dev_attr_shortpreamble); |
| 235 | device_remove_file(dev, &dev_attr_interference); |
| 236 | } |