diff options
Diffstat (limited to 'drivers/net/wireless/ipw2x00/libipw_geo.c')
| -rw-r--r-- | drivers/net/wireless/ipw2x00/libipw_geo.c | 195 |
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 00000000000..960ad13f5e9 --- /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); |