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ath: Add function to check if 4.9GHz channels are allowed

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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>
This commit is contained in:
Bruno Randolf 2011-01-25 13:15:33 +09:00 committed by John W. Linville
parent 20a904904d
commit 5719efdde1
2 changed files with 8 additions and 0 deletions
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7
drivers/net/wireless/ath/regd.c
View file

@ -158,6 +158,13 @@ ieee80211_regdomain *ath_world_regdomain(struct ath_regulatory *reg)
}
}
bool ath_is_49ghz_allowed(u16 regdomain)
{
/* possibly more */
return regdomain == MKK9_MKKC;
}
EXPORT_SYMBOL(ath_is_49ghz_allowed);
/* Frequency is one where radar detection is required */
static bool ath_is_radar_freq(u16 center_freq)
{

1
drivers/net/wireless/ath/regd.h
View file

@ -250,6 +250,7 @@ enum CountryCode {
};
bool ath_is_world_regd(struct ath_regulatory *reg);
bool ath_is_49ghz_allowed(u16 redomain);
int ath_regd_init(struct ath_regulatory *reg, struct wiphy *wiphy,
int (*reg_notifier)(struct wiphy *wiphy,
struct regulatory_request *request));