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Diffstat (limited to 'package/mac80211/src/net/wireless/reg.c')
| -rw-r--r-- | package/mac80211/src/net/wireless/reg.c | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/package/mac80211/src/net/wireless/reg.c b/package/mac80211/src/net/wireless/reg.c deleted file mode 100644 index 2b63c96dcf..0000000000 --- a/package/mac80211/src/net/wireless/reg.c +++ /dev/null @@ -1,153 +0,0 @@ -/* - * Copyright 2002-2005, Instant802 Networks, Inc. - * Copyright 2005-2006, Devicescape Software, Inc. - * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * This regulatory domain control implementation is highly incomplete, it - * only exists for the purpose of not regressing mac80211. - * - * For now, drivers can restrict the set of allowed channels by either - * not registering those channels or setting the IEEE80211_CHAN_DISABLED - * flag; that flag will only be *set* by this code, never *cleared. - * - * The usual implementation is for a driver to read a device EEPROM to - * determine which regulatory domain it should be operating under, then - * looking up the allowable channels in a driver-local table and finally - * registering those channels in the wiphy structure. - * - * Alternatively, drivers that trust the regulatory domain control here - * will register a complete set of capabilities and the control code - * will restrict the set by setting the IEEE80211_CHAN_* flags. - */ -#include <linux/kernel.h> -#include <net/wireless.h> -#include "core.h" - -static char *ieee80211_regdom = "US"; -module_param(ieee80211_regdom, charp, 0444); -MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); - -struct ieee80211_channel_range { - short start_freq; - short end_freq; - int max_power; - int max_antenna_gain; - u32 flags; -}; - -struct ieee80211_regdomain { - const char *code; - const struct ieee80211_channel_range *ranges; - int n_ranges; -}; - -#define RANGE_PWR(_start, _end, _pwr, _ag, _flags) \ - { _start, _end, _pwr, _ag, _flags } - - -/* - * Ideally, in the future, these definitions will be loaded from a - * userspace table via some daemon. - */ -static const struct ieee80211_channel_range ieee80211_US_channels[] = { - /* IEEE 802.11b/g, channels 1..11 */ - RANGE_PWR(2412, 2462, 27, 6, 0), - /* IEEE 802.11a, channels 52..64 */ - RANGE_PWR(5260, 5320, 23, 6, 0), - /* IEEE 802.11a, channels 149..165, outdoor */ - RANGE_PWR(5745, 5825, 30, 6, 0), -}; - -static const struct ieee80211_channel_range ieee80211_JP_channels[] = { - /* IEEE 802.11b/g, channels 1..14 */ - RANGE_PWR(2412, 2484, 20, 6, 0), - /* IEEE 802.11a, channels 34..48 */ - RANGE_PWR(5170, 5240, 20, 6, IEEE80211_CHAN_PASSIVE_SCAN), - /* IEEE 802.11a, channels 52..64 */ - RANGE_PWR(5260, 5320, 20, 6, IEEE80211_CHAN_NO_IBSS | - IEEE80211_CHAN_RADAR), -}; - -#define REGDOM(_code) \ - { \ - .code = __stringify(_code), \ - .ranges = ieee80211_ ##_code## _channels, \ - .n_ranges = ARRAY_SIZE(ieee80211_ ##_code## _channels), \ - } - -static const struct ieee80211_regdomain ieee80211_regdoms[] = { - REGDOM(US), - REGDOM(JP), -}; - - -static const struct ieee80211_regdomain *get_regdom(void) -{ - static const struct ieee80211_channel_range - ieee80211_world_channels[] = { - /* IEEE 802.11b/g, channels 1..11 */ - RANGE_PWR(2412, 2462, 27, 6, 0), - }; - static const struct ieee80211_regdomain regdom_world = REGDOM(world); - int i; - - for (i = 0; i < ARRAY_SIZE(ieee80211_regdoms); i++) - if (strcmp(ieee80211_regdom, ieee80211_regdoms[i].code) == 0) - return &ieee80211_regdoms[i]; - - return ®dom_world; -} - - -static void handle_channel(struct ieee80211_channel *chan, - const struct ieee80211_regdomain *rd) -{ - int i; - u32 flags = chan->orig_flags; - const struct ieee80211_channel_range *rg = NULL; - - for (i = 0; i < rd->n_ranges; i++) { - if (rd->ranges[i].start_freq <= chan->center_freq && - chan->center_freq <= rd->ranges[i].end_freq) { - rg = &rd->ranges[i]; - break; - } - } - - if (!rg) { - /* not found */ - flags |= IEEE80211_CHAN_DISABLED; - chan->flags = flags; - return; - } - - chan->flags = flags; - chan->max_antenna_gain = min(chan->orig_mag, - rg->max_antenna_gain); - chan->max_power = min(chan->orig_mpwr, rg->max_power); -} - -static void handle_band(struct ieee80211_supported_band *sband, - const struct ieee80211_regdomain *rd) -{ - int i; - - for (i = 0; i < sband->n_channels; i++) - handle_channel(&sband->channels[i], rd); -} - -void wiphy_update_regulatory(struct wiphy *wiphy) -{ - enum ieee80211_band band; - const struct ieee80211_regdomain *rd = get_regdom(); - - for (band = 0; band < IEEE80211_NUM_BANDS; band++) - if (wiphy->bands[band]) - handle_band(wiphy->bands[band], rd); -} |