From: Christian Lamparter Date: Sat, 21 Jan 2012 15:59:10 +0000 (+0100) Subject: carl9170: allow users to lower output power level X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=67e43de6dbc9caf52fa7bcf4c813fd088ba6fbfc;p=openwrt%2Fstaging%2Fblogic.git carl9170: allow users to lower output power level This patch implements a simple way of reducing the output power of the device by a configurable upper limit. Requested-by: Harshal Chhaya Signed-off-by: Christian Lamparter Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/ath/carl9170/carl9170.h b/drivers/net/wireless/ath/carl9170/carl9170.h index f0f44c30b2f7..0cea20e3e250 100644 --- a/drivers/net/wireless/ath/carl9170/carl9170.h +++ b/drivers/net/wireless/ath/carl9170/carl9170.h @@ -559,6 +559,7 @@ int carl9170_set_hwretry_limit(struct ar9170 *ar, const u32 max_retry); int carl9170_upload_key(struct ar9170 *ar, const u8 id, const u8 *mac, const u8 ktype, const u8 keyidx, const u8 *keydata, const int keylen); int carl9170_disable_key(struct ar9170 *ar, const u8 id); +int carl9170_set_mac_tpc(struct ar9170 *ar, struct ieee80211_channel *channel); /* RX */ void carl9170_rx(struct ar9170 *ar, void *buf, unsigned int len); diff --git a/drivers/net/wireless/ath/carl9170/mac.c b/drivers/net/wireless/ath/carl9170/mac.c index dfda91970995..53415bfd8bef 100644 --- a/drivers/net/wireless/ath/carl9170/mac.c +++ b/drivers/net/wireless/ath/carl9170/mac.c @@ -485,3 +485,38 @@ int carl9170_disable_key(struct ar9170 *ar, const u8 id) return carl9170_exec_cmd(ar, CARL9170_CMD_DKEY, sizeof(key), (u8 *)&key, 0, NULL); } + +int carl9170_set_mac_tpc(struct ar9170 *ar, struct ieee80211_channel *channel) +{ + unsigned int power, chains; + + if (ar->eeprom.tx_mask != 1) + chains = AR9170_TX_PHY_TXCHAIN_2; + else + chains = AR9170_TX_PHY_TXCHAIN_1; + + switch (channel->band) { + case IEEE80211_BAND_2GHZ: + power = ar->power_2G_ofdm[0] & 0x3f; + break; + case IEEE80211_BAND_5GHZ: + power = ar->power_5G_leg[0] & 0x3f; + break; + default: + BUG_ON(1); + } + + power = min_t(unsigned int, power, ar->hw->conf.power_level * 2); + + carl9170_regwrite_begin(ar); + carl9170_regwrite(AR9170_MAC_REG_ACK_TPC, + 0x3c1e | power << 20 | chains << 26); + carl9170_regwrite(AR9170_MAC_REG_RTS_CTS_TPC, + power << 5 | chains << 11 | + power << 21 | chains << 27); + carl9170_regwrite(AR9170_MAC_REG_CFEND_QOSNULL_TPC, + power << 5 | chains << 11 | + power << 21 | chains << 27); + carl9170_regwrite_finish(); + return carl9170_regwrite_result(); +} diff --git a/drivers/net/wireless/ath/carl9170/main.c b/drivers/net/wireless/ath/carl9170/main.c index 6ee7c55f75a8..8d2523b3f722 100644 --- a/drivers/net/wireless/ath/carl9170/main.c +++ b/drivers/net/wireless/ath/carl9170/main.c @@ -853,11 +853,6 @@ static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed) goto out; } - if (changed & IEEE80211_CONF_CHANGE_POWER) { - /* TODO */ - err = 0; - } - if (changed & IEEE80211_CONF_CHANGE_SMPS) { /* TODO */ err = 0; @@ -891,6 +886,12 @@ static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed) goto out; } + if (changed & IEEE80211_CONF_CHANGE_POWER) { + err = carl9170_set_mac_tpc(ar, ar->hw->conf.channel); + if (err) + goto out; + } + out: mutex_unlock(&ar->mutex); return err; diff --git a/drivers/net/wireless/ath/carl9170/phy.c b/drivers/net/wireless/ath/carl9170/phy.c index 472efc7e3402..b72c09cf43a4 100644 --- a/drivers/net/wireless/ath/carl9170/phy.c +++ b/drivers/net/wireless/ath/carl9170/phy.c @@ -1426,15 +1426,15 @@ static void carl9170_calc_ctl(struct ar9170 *ar, u32 freq, enum carl9170_bw bw) #undef EDGES } -static int carl9170_set_power_cal(struct ar9170 *ar, u32 freq, - enum carl9170_bw bw) +static void carl9170_set_power_cal(struct ar9170 *ar, u32 freq, + enum carl9170_bw bw) { struct ar9170_calibration_target_power_legacy *ctpl; struct ar9170_calibration_target_power_ht *ctph; u8 *ctpres; int ntargets; int idx, i, n; - u8 ackpower, ackchains, f; + u8 f; u8 pwr_freqs[AR5416_MAX_NUM_TGT_PWRS]; if (freq < 3000) @@ -1523,32 +1523,6 @@ static int carl9170_set_power_cal(struct ar9170 *ar, u32 freq, /* calc. conformance test limits and apply to ar->power*[] */ carl9170_calc_ctl(ar, freq, bw); - - /* set ACK/CTS TX power */ - carl9170_regwrite_begin(ar); - - if (ar->eeprom.tx_mask != 1) - ackchains = AR9170_TX_PHY_TXCHAIN_2; - else - ackchains = AR9170_TX_PHY_TXCHAIN_1; - - if (freq < 3000) - ackpower = ar->power_2G_ofdm[0] & 0x3f; - else - ackpower = ar->power_5G_leg[0] & 0x3f; - - carl9170_regwrite(AR9170_MAC_REG_ACK_TPC, - 0x3c1e | ackpower << 20 | ackchains << 26); - carl9170_regwrite(AR9170_MAC_REG_RTS_CTS_TPC, - ackpower << 5 | ackchains << 11 | - ackpower << 21 | ackchains << 27); - - carl9170_regwrite(AR9170_MAC_REG_CFEND_QOSNULL_TPC, - ackpower << 5 | ackchains << 11 | - ackpower << 21 | ackchains << 27); - - carl9170_regwrite_finish(); - return carl9170_regwrite_result(); } int carl9170_get_noisefloor(struct ar9170 *ar) @@ -1712,7 +1686,9 @@ int carl9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel, if (err) return err; - err = carl9170_set_power_cal(ar, channel->center_freq, bw); + carl9170_set_power_cal(ar, channel->center_freq, bw); + + err = carl9170_set_mac_tpc(ar, channel); if (err) return err; diff --git a/drivers/net/wireless/ath/carl9170/tx.c b/drivers/net/wireless/ath/carl9170/tx.c index d19a9ee9d057..771e1a9294c5 100644 --- a/drivers/net/wireless/ath/carl9170/tx.c +++ b/drivers/net/wireless/ath/carl9170/tx.c @@ -719,6 +719,8 @@ static void carl9170_tx_rate_tpc_chains(struct ar9170 *ar, else *chains = AR9170_TX_PHY_TXCHAIN_2; } + + *tpc = min_t(unsigned int, *tpc, ar->hw->conf.power_level * 2); } static __le32 carl9170_tx_physet(struct ar9170 *ar,