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path: root/drivers/net/wireless/ipw2x00/libipw_geo.c
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Diffstat (limited to 'drivers/net/wireless/ipw2x00/libipw_geo.c')
-rw-r--r--drivers/net/wireless/ipw2x00/libipw_geo.c195
1 files changed, 195 insertions, 0 deletions
diff --git a/drivers/net/wireless/ipw2x00/libipw_geo.c b/drivers/net/wireless/ipw2x00/libipw_geo.c
new file mode 100644
index 0000000..960ad13
--- /dev/null
+++ b/drivers/net/wireless/ipw2x00/libipw_geo.c
@@ -0,0 +1,195 @@
+/******************************************************************************
+
+ Copyright(c) 2005 Intel Corporation. All rights reserved.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of version 2 of the GNU General Public License as
+ published by the Free Software Foundation.
+
+ This program is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ more details.
+
+ You should have received a copy of the GNU General Public License along with
+ this program; if not, write to the Free Software Foundation, Inc., 59
+ Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+ The full GNU General Public License is included in this distribution in the
+ file called LICENSE.
+
+ Contact Information:
+ James P. Ketrenos <ipw2100-admin@linux.intel.com>
+ Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+
+******************************************************************************/
+#include <linux/compiler.h>
+#include <linux/errno.h>
+#include <linux/if_arp.h>
+#include <linux/in6.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/proc_fs.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/tcp.h>
+#include <linux/types.h>
+#include <linux/wireless.h>
+#include <linux/etherdevice.h>
+#include <asm/uaccess.h>
+
+#include <net/ieee80211.h>
+
+int ieee80211_is_valid_channel(struct ieee80211_device *ieee, u8 channel)
+{
+ int i;
+
+ /* Driver needs to initialize the geography map before using
+ * these helper functions */
+ if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0)
+ return 0;
+
+ if (ieee->freq_band & IEEE80211_24GHZ_BAND)
+ for (i = 0; i < ieee->geo.bg_channels; i++)
+ /* NOTE: If G mode is currently supported but
+ * this is a B only channel, we don't see it
+ * as valid. */
+ if ((ieee->geo.bg[i].channel == channel) &&
+ !(ieee->geo.bg[i].flags & IEEE80211_CH_INVALID) &&
+ (!(ieee->mode & IEEE_G) ||
+ !(ieee->geo.bg[i].flags & IEEE80211_CH_B_ONLY)))
+ return IEEE80211_24GHZ_BAND;
+
+ if (ieee->freq_band & IEEE80211_52GHZ_BAND)
+ for (i = 0; i < ieee->geo.a_channels; i++)
+ if ((ieee->geo.a[i].channel == channel) &&
+ !(ieee->geo.a[i].flags & IEEE80211_CH_INVALID))
+ return IEEE80211_52GHZ_BAND;
+
+ return 0;
+}
+
+int ieee80211_channel_to_index(struct ieee80211_device *ieee, u8 channel)
+{
+ int i;
+
+ /* Driver needs to initialize the geography map before using
+ * these helper functions */
+ if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0)
+ return -1;
+
+ if (ieee->freq_band & IEEE80211_24GHZ_BAND)
+ for (i = 0; i < ieee->geo.bg_channels; i++)
+ if (ieee->geo.bg[i].channel == channel)
+ return i;
+
+ if (ieee->freq_band & IEEE80211_52GHZ_BAND)
+ for (i = 0; i < ieee->geo.a_channels; i++)
+ if (ieee->geo.a[i].channel == channel)
+ return i;
+
+ return -1;
+}
+
+u32 ieee80211_channel_to_freq(struct ieee80211_device * ieee, u8 channel)
+{
+ const struct ieee80211_channel * ch;
+
+ /* Driver needs to initialize the geography map before using
+ * these helper functions */
+ if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0)
+ return 0;
+
+ ch = ieee80211_get_channel(ieee, channel);
+ if (!ch->channel)
+ return 0;
+ return ch->freq;
+}
+
+u8 ieee80211_freq_to_channel(struct ieee80211_device * ieee, u32 freq)
+{
+ int i;
+
+ /* Driver needs to initialize the geography map before using
+ * these helper functions */
+ if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0)
+ return 0;
+
+ freq /= 100000;
+
+ if (ieee->freq_band & IEEE80211_24GHZ_BAND)
+ for (i = 0; i < ieee->geo.bg_channels; i++)
+ if (ieee->geo.bg[i].freq == freq)
+ return ieee->geo.bg[i].channel;
+
+ if (ieee->freq_band & IEEE80211_52GHZ_BAND)
+ for (i = 0; i < ieee->geo.a_channels; i++)
+ if (ieee->geo.a[i].freq == freq)
+ return ieee->geo.a[i].channel;
+
+ return 0;
+}
+
+int ieee80211_set_geo(struct ieee80211_device *ieee,
+ const struct ieee80211_geo *geo)
+{
+ memcpy(ieee->geo.name, geo->name, 3);
+ ieee->geo.name[3] = '\0';
+ ieee->geo.bg_channels = geo->bg_channels;
+ ieee->geo.a_channels = geo->a_channels;
+ memcpy(ieee->geo.bg, geo->bg, geo->bg_channels *
+ sizeof(struct ieee80211_channel));
+ memcpy(ieee->geo.a, geo->a, ieee->geo.a_channels *
+ sizeof(struct ieee80211_channel));
+ return 0;
+}
+
+const struct ieee80211_geo *ieee80211_get_geo(struct ieee80211_device *ieee)
+{
+ return &ieee->geo;
+}
+
+u8 ieee80211_get_channel_flags(struct ieee80211_device * ieee, u8 channel)
+{
+ int index = ieee80211_channel_to_index(ieee, channel);
+
+ if (index == -1)
+ return IEEE80211_CH_INVALID;
+
+ if (channel <= IEEE80211_24GHZ_CHANNELS)
+ return ieee->geo.bg[index].flags;
+
+ return ieee->geo.a[index].flags;
+}
+
+static const struct ieee80211_channel bad_channel = {
+ .channel = 0,
+ .flags = IEEE80211_CH_INVALID,
+ .max_power = 0,
+};
+
+const struct ieee80211_channel *ieee80211_get_channel(struct ieee80211_device
+ *ieee, u8 channel)
+{
+ int index = ieee80211_channel_to_index(ieee, channel);
+
+ if (index == -1)
+ return &bad_channel;
+
+ if (channel <= IEEE80211_24GHZ_CHANNELS)
+ return &ieee->geo.bg[index];
+
+ return &ieee->geo.a[index];
+}
+
+EXPORT_SYMBOL(ieee80211_get_channel);
+EXPORT_SYMBOL(ieee80211_get_channel_flags);
+EXPORT_SYMBOL(ieee80211_is_valid_channel);
+EXPORT_SYMBOL(ieee80211_freq_to_channel);
+EXPORT_SYMBOL(ieee80211_channel_to_freq);
+EXPORT_SYMBOL(ieee80211_channel_to_index);
+EXPORT_SYMBOL(ieee80211_set_geo);
+EXPORT_SYMBOL(ieee80211_get_geo);