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5719efdde1
This adds a helper function to ath/regd.c which can be asked if 4.9GHz channels are allowed for a given regulatory domain code. This keeps the knowledge of regdomains and defines like MKK9_MKKC in one place. I'm passing the regdomain code instead of the ath_regulatory structure because this needs to be called quite early in the driver inititalization where ath_regulatory is not available yet in ath5k. I'm using MKK9_MKKC only because this is the regdomain in the 802.11j enabled sample cards we got from our vendor. I found some hints in HAL code that this is used by Atheros to indicate 4.9GHz channels support and that there might be other domain codes as well, but as I don't have any documentation I'm just putting in what I need right now. It can be extended later. Signed-off-by: Bruno Randolf <br1@einfach.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
605 lines
16 KiB
C
605 lines
16 KiB
C
/*
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* Copyright (c) 2008-2009 Atheros Communications Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <linux/kernel.h>
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#include <net/cfg80211.h>
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#include <net/mac80211.h>
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#include "regd.h"
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#include "regd_common.h"
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/*
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* This is a set of common rules used by our world regulatory domains.
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* We have 12 world regulatory domains. To save space we consolidate
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* the regulatory domains in 5 structures by frequency and change
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* the flags on our reg_notifier() on a case by case basis.
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*/
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/* Only these channels all allow active scan on all world regulatory domains */
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#define ATH9K_2GHZ_CH01_11 REG_RULE(2412-10, 2462+10, 40, 0, 20, 0)
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/* We enable active scan on these a case by case basis by regulatory domain */
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#define ATH9K_2GHZ_CH12_13 REG_RULE(2467-10, 2472+10, 40, 0, 20,\
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NL80211_RRF_PASSIVE_SCAN)
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#define ATH9K_2GHZ_CH14 REG_RULE(2484-10, 2484+10, 40, 0, 20,\
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NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_OFDM)
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/* We allow IBSS on these on a case by case basis by regulatory domain */
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#define ATH9K_5GHZ_5150_5350 REG_RULE(5150-10, 5350+10, 40, 0, 30,\
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NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
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#define ATH9K_5GHZ_5470_5850 REG_RULE(5470-10, 5850+10, 40, 0, 30,\
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NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
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#define ATH9K_5GHZ_5725_5850 REG_RULE(5725-10, 5850+10, 40, 0, 30,\
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NL80211_RRF_PASSIVE_SCAN | NL80211_RRF_NO_IBSS)
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#define ATH9K_2GHZ_ALL ATH9K_2GHZ_CH01_11, \
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ATH9K_2GHZ_CH12_13, \
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ATH9K_2GHZ_CH14
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#define ATH9K_5GHZ_ALL ATH9K_5GHZ_5150_5350, \
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ATH9K_5GHZ_5470_5850
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/* This one skips what we call "mid band" */
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#define ATH9K_5GHZ_NO_MIDBAND ATH9K_5GHZ_5150_5350, \
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ATH9K_5GHZ_5725_5850
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/* Can be used for:
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* 0x60, 0x61, 0x62 */
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static const struct ieee80211_regdomain ath_world_regdom_60_61_62 = {
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.n_reg_rules = 5,
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.alpha2 = "99",
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.reg_rules = {
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ATH9K_2GHZ_ALL,
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ATH9K_5GHZ_ALL,
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}
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};
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/* Can be used by 0x63 and 0x65 */
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static const struct ieee80211_regdomain ath_world_regdom_63_65 = {
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.n_reg_rules = 4,
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.alpha2 = "99",
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.reg_rules = {
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ATH9K_2GHZ_CH01_11,
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ATH9K_2GHZ_CH12_13,
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ATH9K_5GHZ_NO_MIDBAND,
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}
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};
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/* Can be used by 0x64 only */
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static const struct ieee80211_regdomain ath_world_regdom_64 = {
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.n_reg_rules = 3,
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.alpha2 = "99",
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.reg_rules = {
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ATH9K_2GHZ_CH01_11,
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ATH9K_5GHZ_NO_MIDBAND,
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}
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};
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/* Can be used by 0x66 and 0x69 */
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static const struct ieee80211_regdomain ath_world_regdom_66_69 = {
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.n_reg_rules = 3,
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.alpha2 = "99",
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.reg_rules = {
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ATH9K_2GHZ_CH01_11,
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ATH9K_5GHZ_ALL,
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}
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};
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/* Can be used by 0x67, 0x6A and 0x68 */
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static const struct ieee80211_regdomain ath_world_regdom_67_68_6A = {
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.n_reg_rules = 4,
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.alpha2 = "99",
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.reg_rules = {
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ATH9K_2GHZ_CH01_11,
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ATH9K_2GHZ_CH12_13,
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ATH9K_5GHZ_ALL,
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}
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};
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static inline bool is_wwr_sku(u16 regd)
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{
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return ((regd & COUNTRY_ERD_FLAG) != COUNTRY_ERD_FLAG) &&
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(((regd & WORLD_SKU_MASK) == WORLD_SKU_PREFIX) ||
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(regd == WORLD));
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}
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static u16 ath_regd_get_eepromRD(struct ath_regulatory *reg)
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{
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return reg->current_rd & ~WORLDWIDE_ROAMING_FLAG;
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}
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bool ath_is_world_regd(struct ath_regulatory *reg)
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{
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return is_wwr_sku(ath_regd_get_eepromRD(reg));
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}
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EXPORT_SYMBOL(ath_is_world_regd);
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static const struct ieee80211_regdomain *ath_default_world_regdomain(void)
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{
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/* this is the most restrictive */
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return &ath_world_regdom_64;
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}
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static const struct
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ieee80211_regdomain *ath_world_regdomain(struct ath_regulatory *reg)
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{
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switch (reg->regpair->regDmnEnum) {
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case 0x60:
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case 0x61:
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case 0x62:
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return &ath_world_regdom_60_61_62;
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case 0x63:
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case 0x65:
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return &ath_world_regdom_63_65;
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case 0x64:
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return &ath_world_regdom_64;
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case 0x66:
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case 0x69:
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return &ath_world_regdom_66_69;
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case 0x67:
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case 0x68:
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case 0x6A:
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return &ath_world_regdom_67_68_6A;
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default:
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WARN_ON(1);
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return ath_default_world_regdomain();
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}
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}
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bool ath_is_49ghz_allowed(u16 regdomain)
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{
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/* possibly more */
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return regdomain == MKK9_MKKC;
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}
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EXPORT_SYMBOL(ath_is_49ghz_allowed);
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/* Frequency is one where radar detection is required */
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static bool ath_is_radar_freq(u16 center_freq)
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{
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return (center_freq >= 5260 && center_freq <= 5700);
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}
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/*
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* N.B: These exception rules do not apply radar freqs.
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*
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* - We enable adhoc (or beaconing) if allowed by 11d
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* - We enable active scan if the channel is allowed by 11d
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* - If no country IE has been processed and a we determine we have
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* received a beacon on a channel we can enable active scan and
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* adhoc (or beaconing).
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*/
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static void
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ath_reg_apply_beaconing_flags(struct wiphy *wiphy,
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enum nl80211_reg_initiator initiator)
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{
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enum ieee80211_band band;
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struct ieee80211_supported_band *sband;
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const struct ieee80211_reg_rule *reg_rule;
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struct ieee80211_channel *ch;
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unsigned int i;
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u32 bandwidth = 0;
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int r;
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for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
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if (!wiphy->bands[band])
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continue;
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sband = wiphy->bands[band];
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for (i = 0; i < sband->n_channels; i++) {
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ch = &sband->channels[i];
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if (ath_is_radar_freq(ch->center_freq) ||
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(ch->flags & IEEE80211_CHAN_RADAR))
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continue;
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if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
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r = freq_reg_info(wiphy,
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ch->center_freq,
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bandwidth,
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®_rule);
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if (r)
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continue;
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/*
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* If 11d had a rule for this channel ensure
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* we enable adhoc/beaconing if it allows us to
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* use it. Note that we would have disabled it
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* by applying our static world regdomain by
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* default during init, prior to calling our
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* regulatory_hint().
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*/
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if (!(reg_rule->flags &
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NL80211_RRF_NO_IBSS))
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ch->flags &=
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~IEEE80211_CHAN_NO_IBSS;
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if (!(reg_rule->flags &
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NL80211_RRF_PASSIVE_SCAN))
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ch->flags &=
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~IEEE80211_CHAN_PASSIVE_SCAN;
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} else {
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if (ch->beacon_found)
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ch->flags &= ~(IEEE80211_CHAN_NO_IBSS |
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IEEE80211_CHAN_PASSIVE_SCAN);
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}
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}
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}
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}
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/* Allows active scan scan on Ch 12 and 13 */
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static void
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ath_reg_apply_active_scan_flags(struct wiphy *wiphy,
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enum nl80211_reg_initiator initiator)
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{
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struct ieee80211_supported_band *sband;
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struct ieee80211_channel *ch;
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const struct ieee80211_reg_rule *reg_rule;
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u32 bandwidth = 0;
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int r;
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sband = wiphy->bands[IEEE80211_BAND_2GHZ];
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/*
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* If no country IE has been received always enable active scan
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* on these channels. This is only done for specific regulatory SKUs
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*/
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if (initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) {
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ch = &sband->channels[11]; /* CH 12 */
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if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
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ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
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ch = &sband->channels[12]; /* CH 13 */
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if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
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ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
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return;
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}
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/*
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* If a country IE has been recieved check its rule for this
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* channel first before enabling active scan. The passive scan
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* would have been enforced by the initial processing of our
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* custom regulatory domain.
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*/
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ch = &sband->channels[11]; /* CH 12 */
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r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule);
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if (!r) {
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if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
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if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
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ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
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}
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ch = &sband->channels[12]; /* CH 13 */
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r = freq_reg_info(wiphy, ch->center_freq, bandwidth, ®_rule);
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if (!r) {
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if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN))
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if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN)
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ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN;
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}
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}
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/* Always apply Radar/DFS rules on freq range 5260 MHz - 5700 MHz */
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static void ath_reg_apply_radar_flags(struct wiphy *wiphy)
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{
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struct ieee80211_supported_band *sband;
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struct ieee80211_channel *ch;
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unsigned int i;
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if (!wiphy->bands[IEEE80211_BAND_5GHZ])
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return;
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sband = wiphy->bands[IEEE80211_BAND_5GHZ];
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for (i = 0; i < sband->n_channels; i++) {
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ch = &sband->channels[i];
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if (!ath_is_radar_freq(ch->center_freq))
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continue;
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/* We always enable radar detection/DFS on this
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* frequency range. Additionally we also apply on
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* this frequency range:
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* - If STA mode does not yet have DFS supports disable
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* active scanning
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* - If adhoc mode does not support DFS yet then
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* disable adhoc in the frequency.
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* - If AP mode does not yet support radar detection/DFS
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* do not allow AP mode
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*/
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if (!(ch->flags & IEEE80211_CHAN_DISABLED))
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ch->flags |= IEEE80211_CHAN_RADAR |
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IEEE80211_CHAN_NO_IBSS |
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IEEE80211_CHAN_PASSIVE_SCAN;
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}
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}
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static void ath_reg_apply_world_flags(struct wiphy *wiphy,
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enum nl80211_reg_initiator initiator,
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struct ath_regulatory *reg)
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{
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switch (reg->regpair->regDmnEnum) {
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case 0x60:
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case 0x63:
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case 0x66:
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case 0x67:
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ath_reg_apply_beaconing_flags(wiphy, initiator);
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break;
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case 0x68:
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ath_reg_apply_beaconing_flags(wiphy, initiator);
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ath_reg_apply_active_scan_flags(wiphy, initiator);
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break;
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}
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}
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int ath_reg_notifier_apply(struct wiphy *wiphy,
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struct regulatory_request *request,
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struct ath_regulatory *reg)
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{
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/* We always apply this */
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ath_reg_apply_radar_flags(wiphy);
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/*
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* This would happen when we have sent a custom regulatory request
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* a world regulatory domain and the scheduler hasn't yet processed
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* any pending requests in the queue.
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*/
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if (!request)
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return 0;
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switch (request->initiator) {
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case NL80211_REGDOM_SET_BY_DRIVER:
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case NL80211_REGDOM_SET_BY_CORE:
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case NL80211_REGDOM_SET_BY_USER:
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break;
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case NL80211_REGDOM_SET_BY_COUNTRY_IE:
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if (ath_is_world_regd(reg))
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ath_reg_apply_world_flags(wiphy, request->initiator,
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reg);
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break;
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}
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return 0;
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}
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EXPORT_SYMBOL(ath_reg_notifier_apply);
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static bool ath_regd_is_eeprom_valid(struct ath_regulatory *reg)
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{
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u16 rd = ath_regd_get_eepromRD(reg);
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int i;
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if (rd & COUNTRY_ERD_FLAG) {
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/* EEPROM value is a country code */
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u16 cc = rd & ~COUNTRY_ERD_FLAG;
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printk(KERN_DEBUG
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"ath: EEPROM indicates we should expect "
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"a country code\n");
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for (i = 0; i < ARRAY_SIZE(allCountries); i++)
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if (allCountries[i].countryCode == cc)
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return true;
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} else {
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/* EEPROM value is a regpair value */
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if (rd != CTRY_DEFAULT)
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printk(KERN_DEBUG "ath: EEPROM indicates we "
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"should expect a direct regpair map\n");
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for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++)
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if (regDomainPairs[i].regDmnEnum == rd)
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return true;
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}
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printk(KERN_DEBUG
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"ath: invalid regulatory domain/country code 0x%x\n", rd);
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return false;
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}
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/* EEPROM country code to regpair mapping */
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static struct country_code_to_enum_rd*
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ath_regd_find_country(u16 countryCode)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
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if (allCountries[i].countryCode == countryCode)
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return &allCountries[i];
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}
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return NULL;
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}
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/* EEPROM rd code to regpair mapping */
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static struct country_code_to_enum_rd*
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ath_regd_find_country_by_rd(int regdmn)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(allCountries); i++) {
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if (allCountries[i].regDmnEnum == regdmn)
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return &allCountries[i];
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}
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return NULL;
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}
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/* Returns the map of the EEPROM set RD to a country code */
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static u16 ath_regd_get_default_country(u16 rd)
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{
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if (rd & COUNTRY_ERD_FLAG) {
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struct country_code_to_enum_rd *country = NULL;
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u16 cc = rd & ~COUNTRY_ERD_FLAG;
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country = ath_regd_find_country(cc);
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if (country != NULL)
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return cc;
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}
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return CTRY_DEFAULT;
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}
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static struct reg_dmn_pair_mapping*
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ath_get_regpair(int regdmn)
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{
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int i;
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if (regdmn == NO_ENUMRD)
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return NULL;
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for (i = 0; i < ARRAY_SIZE(regDomainPairs); i++) {
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if (regDomainPairs[i].regDmnEnum == regdmn)
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return ®DomainPairs[i];
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}
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return NULL;
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}
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static int
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ath_regd_init_wiphy(struct ath_regulatory *reg,
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struct wiphy *wiphy,
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int (*reg_notifier)(struct wiphy *wiphy,
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struct regulatory_request *request))
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{
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const struct ieee80211_regdomain *regd;
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wiphy->reg_notifier = reg_notifier;
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wiphy->flags |= WIPHY_FLAG_STRICT_REGULATORY;
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if (ath_is_world_regd(reg)) {
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/*
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* Anything applied here (prior to wiphy registration) gets
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* saved on the wiphy orig_* parameters
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*/
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regd = ath_world_regdomain(reg);
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wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY;
|
|
} else {
|
|
/*
|
|
* This gets applied in the case of the absense of CRDA,
|
|
* it's our own custom world regulatory domain, similar to
|
|
* cfg80211's but we enable passive scanning.
|
|
*/
|
|
regd = ath_default_world_regdomain();
|
|
}
|
|
wiphy_apply_custom_regulatory(wiphy, regd);
|
|
ath_reg_apply_radar_flags(wiphy);
|
|
ath_reg_apply_world_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER, reg);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Some users have reported their EEPROM programmed with
|
|
* 0x8000 set, this is not a supported regulatory domain
|
|
* but since we have more than one user with it we need
|
|
* a solution for them. We default to 0x64, which is the
|
|
* default Atheros world regulatory domain.
|
|
*/
|
|
static void ath_regd_sanitize(struct ath_regulatory *reg)
|
|
{
|
|
if (reg->current_rd != COUNTRY_ERD_FLAG)
|
|
return;
|
|
printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n");
|
|
reg->current_rd = 0x64;
|
|
}
|
|
|
|
int
|
|
ath_regd_init(struct ath_regulatory *reg,
|
|
struct wiphy *wiphy,
|
|
int (*reg_notifier)(struct wiphy *wiphy,
|
|
struct regulatory_request *request))
|
|
{
|
|
struct country_code_to_enum_rd *country = NULL;
|
|
u16 regdmn;
|
|
|
|
if (!reg)
|
|
return -EINVAL;
|
|
|
|
ath_regd_sanitize(reg);
|
|
|
|
printk(KERN_DEBUG "ath: EEPROM regdomain: 0x%0x\n", reg->current_rd);
|
|
|
|
if (!ath_regd_is_eeprom_valid(reg)) {
|
|
printk(KERN_ERR "ath: Invalid EEPROM contents\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
regdmn = ath_regd_get_eepromRD(reg);
|
|
reg->country_code = ath_regd_get_default_country(regdmn);
|
|
|
|
if (reg->country_code == CTRY_DEFAULT &&
|
|
regdmn == CTRY_DEFAULT) {
|
|
printk(KERN_DEBUG "ath: EEPROM indicates default "
|
|
"country code should be used\n");
|
|
reg->country_code = CTRY_UNITED_STATES;
|
|
}
|
|
|
|
if (reg->country_code == CTRY_DEFAULT) {
|
|
country = NULL;
|
|
} else {
|
|
printk(KERN_DEBUG "ath: doing EEPROM country->regdmn "
|
|
"map search\n");
|
|
country = ath_regd_find_country(reg->country_code);
|
|
if (country == NULL) {
|
|
printk(KERN_DEBUG
|
|
"ath: no valid country maps found for "
|
|
"country code: 0x%0x\n",
|
|
reg->country_code);
|
|
return -EINVAL;
|
|
} else {
|
|
regdmn = country->regDmnEnum;
|
|
printk(KERN_DEBUG "ath: country maps to "
|
|
"regdmn code: 0x%0x\n",
|
|
regdmn);
|
|
}
|
|
}
|
|
|
|
reg->regpair = ath_get_regpair(regdmn);
|
|
|
|
if (!reg->regpair) {
|
|
printk(KERN_DEBUG "ath: "
|
|
"No regulatory domain pair found, cannot continue\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!country)
|
|
country = ath_regd_find_country_by_rd(regdmn);
|
|
|
|
if (country) {
|
|
reg->alpha2[0] = country->isoName[0];
|
|
reg->alpha2[1] = country->isoName[1];
|
|
} else {
|
|
reg->alpha2[0] = '0';
|
|
reg->alpha2[1] = '0';
|
|
}
|
|
|
|
printk(KERN_DEBUG "ath: Country alpha2 being used: %c%c\n",
|
|
reg->alpha2[0], reg->alpha2[1]);
|
|
printk(KERN_DEBUG "ath: Regpair used: 0x%0x\n",
|
|
reg->regpair->regDmnEnum);
|
|
|
|
ath_regd_init_wiphy(reg, wiphy, reg_notifier);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ath_regd_init);
|
|
|
|
u32 ath_regd_get_band_ctl(struct ath_regulatory *reg,
|
|
enum ieee80211_band band)
|
|
{
|
|
if (!reg->regpair ||
|
|
(reg->country_code == CTRY_DEFAULT &&
|
|
is_wwr_sku(ath_regd_get_eepromRD(reg)))) {
|
|
return SD_NO_CTL;
|
|
}
|
|
|
|
switch (band) {
|
|
case IEEE80211_BAND_2GHZ:
|
|
return reg->regpair->reg_2ghz_ctl;
|
|
case IEEE80211_BAND_5GHZ:
|
|
return reg->regpair->reg_5ghz_ctl;
|
|
default:
|
|
return NO_CTL;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(ath_regd_get_band_ctl);
|