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ath5k: Track current TX power separately from max TX power

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Add a new variable to keep track of the currently configured tx power. Before
max_pwr was re-used for keeping the maximum allowed power as well as the
current configuration. Doing a min() on it allows you to lower the txpower, but
how would you be able to make it higher again?

This patch fixes that by adding a new variable ah_cur_pwr which is used instead
of txp_max_pwr to keep the current configuration. txp_max_pwr is used to check
if we are within the limits.

Another problem fixed by this patch is that it avoids setting a zero txpower
when things are initialized first and the current power is not yet set.

Signed-off-by: Bruno Randolf <br1@einfach.org>
Acked-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Bruno Randolf 2010-12-21 17:30:32 +09:00 committed by John W. Linville
parent 56bd29d361
commit 51f00622e5
2 changed files with 4 additions and 4 deletions
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1
drivers/net/wireless/ath/ath5k/ath5k.h
View File

@ -1107,6 +1107,7 @@ struct ath5k_hw {
/* Values in 0.25dB units */
s16 txp_min_pwr;
s16 txp_max_pwr;
s16 txp_cur_pwr;
/* Values in 0.5dB units */
s16 txp_offset;
s16 txp_ofdm;

7
drivers/net/wireless/ath/ath5k/phy.c
View File

@ -3096,7 +3096,7 @@ ath5k_setup_rate_powertable(struct ath5k_hw *ah, u16 max_pwr,
/* Min/max in 0.25dB units */
ah->ah_txpower.txp_min_pwr = 2 * rates[7];
ah->ah_txpower.txp_max_pwr = 2 * rates[0];
ah->ah_txpower.txp_cur_pwr = 2 * rates[0];
ah->ah_txpower.txp_ofdm = rates[7];
}
@ -3150,8 +3150,6 @@ ath5k_hw_txpower(struct ath5k_hw *ah, struct ieee80211_channel *channel,
/* Reset TX power values */
memset(&ah->ah_txpower, 0, sizeof(ah->ah_txpower));
ah->ah_txpower.txp_tpc = AR5K_TUNE_TPC_TXPOWER;
ah->ah_txpower.txp_min_pwr = 0;
ah->ah_txpower.txp_max_pwr = AR5K_TUNE_MAX_TXPOWER;
/* Calculate the powertable */
ret = ath5k_setup_channel_powertable(ah, channel,
@ -3290,7 +3288,8 @@ int ath5k_hw_phy_init(struct ath5k_hw *ah, struct ieee80211_channel *channel,
* properly set curve indices.
*/
ret = ath5k_hw_txpower(ah, channel, ee_mode,
ah->ah_txpower.txp_max_pwr / 2);
ah->ah_txpower.txp_cur_pwr ?
ah->ah_txpower.txp_cur_pwr / 2 : AR5K_TUNE_MAX_TXPOWER);
if (ret)
return ret;