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179 lines
4.7 KiB
179 lines
4.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/****************************************************************************** |
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Copyright(c) 2005 Intel Corporation. All rights reserved. |
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Contact Information: |
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Intel Linux Wireless <[email protected]> |
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Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
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******************************************************************************/ |
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#include <linux/compiler.h> |
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#include <linux/errno.h> |
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#include <linux/if_arp.h> |
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#include <linux/in6.h> |
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#include <linux/in.h> |
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#include <linux/ip.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/netdevice.h> |
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#include <linux/proc_fs.h> |
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#include <linux/skbuff.h> |
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#include <linux/tcp.h> |
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#include <linux/types.h> |
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#include <linux/wireless.h> |
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#include <linux/etherdevice.h> |
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#include <linux/uaccess.h> |
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#include "libipw.h" |
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int libipw_is_valid_channel(struct libipw_device *ieee, u8 channel) |
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{ |
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int i; |
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/* Driver needs to initialize the geography map before using |
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* these helper functions */ |
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if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0) |
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return 0; |
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if (ieee->freq_band & LIBIPW_24GHZ_BAND) |
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for (i = 0; i < ieee->geo.bg_channels; i++) |
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/* NOTE: If G mode is currently supported but |
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* this is a B only channel, we don't see it |
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* as valid. */ |
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if ((ieee->geo.bg[i].channel == channel) && |
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!(ieee->geo.bg[i].flags & LIBIPW_CH_INVALID) && |
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(!(ieee->mode & IEEE_G) || |
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!(ieee->geo.bg[i].flags & LIBIPW_CH_B_ONLY))) |
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return LIBIPW_24GHZ_BAND; |
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if (ieee->freq_band & LIBIPW_52GHZ_BAND) |
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for (i = 0; i < ieee->geo.a_channels; i++) |
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if ((ieee->geo.a[i].channel == channel) && |
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!(ieee->geo.a[i].flags & LIBIPW_CH_INVALID)) |
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return LIBIPW_52GHZ_BAND; |
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return 0; |
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} |
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int libipw_channel_to_index(struct libipw_device *ieee, u8 channel) |
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{ |
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int i; |
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/* Driver needs to initialize the geography map before using |
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* these helper functions */ |
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if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0) |
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return -1; |
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if (ieee->freq_band & LIBIPW_24GHZ_BAND) |
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for (i = 0; i < ieee->geo.bg_channels; i++) |
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if (ieee->geo.bg[i].channel == channel) |
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return i; |
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if (ieee->freq_band & LIBIPW_52GHZ_BAND) |
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for (i = 0; i < ieee->geo.a_channels; i++) |
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if (ieee->geo.a[i].channel == channel) |
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return i; |
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return -1; |
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} |
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u32 libipw_channel_to_freq(struct libipw_device * ieee, u8 channel) |
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{ |
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const struct libipw_channel * ch; |
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/* Driver needs to initialize the geography map before using |
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* these helper functions */ |
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if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0) |
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return 0; |
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ch = libipw_get_channel(ieee, channel); |
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if (!ch->channel) |
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return 0; |
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return ch->freq; |
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} |
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u8 libipw_freq_to_channel(struct libipw_device * ieee, u32 freq) |
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{ |
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int i; |
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/* Driver needs to initialize the geography map before using |
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* these helper functions */ |
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if (ieee->geo.bg_channels == 0 && ieee->geo.a_channels == 0) |
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return 0; |
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freq /= 100000; |
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if (ieee->freq_band & LIBIPW_24GHZ_BAND) |
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for (i = 0; i < ieee->geo.bg_channels; i++) |
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if (ieee->geo.bg[i].freq == freq) |
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return ieee->geo.bg[i].channel; |
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if (ieee->freq_band & LIBIPW_52GHZ_BAND) |
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for (i = 0; i < ieee->geo.a_channels; i++) |
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if (ieee->geo.a[i].freq == freq) |
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return ieee->geo.a[i].channel; |
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return 0; |
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} |
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void libipw_set_geo(struct libipw_device *ieee, |
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const struct libipw_geo *geo) |
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{ |
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memcpy(ieee->geo.name, geo->name, 3); |
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ieee->geo.name[3] = '\0'; |
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ieee->geo.bg_channels = geo->bg_channels; |
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ieee->geo.a_channels = geo->a_channels; |
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memcpy(ieee->geo.bg, geo->bg, geo->bg_channels * |
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sizeof(struct libipw_channel)); |
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memcpy(ieee->geo.a, geo->a, ieee->geo.a_channels * |
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sizeof(struct libipw_channel)); |
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} |
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const struct libipw_geo *libipw_get_geo(struct libipw_device *ieee) |
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{ |
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return &ieee->geo; |
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} |
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u8 libipw_get_channel_flags(struct libipw_device * ieee, u8 channel) |
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{ |
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int index = libipw_channel_to_index(ieee, channel); |
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if (index == -1) |
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return LIBIPW_CH_INVALID; |
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if (channel <= LIBIPW_24GHZ_CHANNELS) |
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return ieee->geo.bg[index].flags; |
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return ieee->geo.a[index].flags; |
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} |
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static const struct libipw_channel bad_channel = { |
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.channel = 0, |
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.flags = LIBIPW_CH_INVALID, |
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.max_power = 0, |
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}; |
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const struct libipw_channel *libipw_get_channel(struct libipw_device |
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*ieee, u8 channel) |
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{ |
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int index = libipw_channel_to_index(ieee, channel); |
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if (index == -1) |
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return &bad_channel; |
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if (channel <= LIBIPW_24GHZ_CHANNELS) |
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return &ieee->geo.bg[index]; |
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return &ieee->geo.a[index]; |
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} |
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EXPORT_SYMBOL(libipw_get_channel); |
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EXPORT_SYMBOL(libipw_get_channel_flags); |
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EXPORT_SYMBOL(libipw_is_valid_channel); |
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EXPORT_SYMBOL(libipw_freq_to_channel); |
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EXPORT_SYMBOL(libipw_channel_to_freq); |
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EXPORT_SYMBOL(libipw_channel_to_index); |
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EXPORT_SYMBOL(libipw_set_geo); |
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EXPORT_SYMBOL(libipw_get_geo);
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