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ath9k_hw: fix LNA control on WLAN sleep 

When WLAN enter full sleep mode, WLAN HW should send out a LNA_TAKE
message for BT to take control of the shared LNA. Otherwise BT traffic
is completely stopped whenever the wlan interface is moved full sleep
mode.

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rajkumar Manoharan 2012-06-18 19:02:40 +05:30 committed by John W. Linville
parent 0967d86231
commit 4ff6a9d200
1 changed files with 15 additions and 2 deletions
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17
drivers/net/wireless/ath/ath9k/ar9003_mci.c
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@ -1015,9 +1015,14 @@ void ar9003_mci_2g5g_switch(struct ath_hw *ah, bool force)
return;
if (mci->is_2g) {
ar9003_mci_send_2g5g_status(ah, true);
if (!force) {
ar9003_mci_send_2g5g_status(ah, true);
REG_SET_BIT(ah, AR_MCI_TX_CTRL,
ar9003_mci_send_lna_transfer(ah, true);
udelay(5);
}
REG_CLR_BIT(ah, AR_MCI_TX_CTRL,
AR_MCI_TX_CTRL_DISABLE_LNA_UPDATE);
REG_CLR_BIT(ah, AR_PHY_GLB_CONTROL,
AR_BTCOEX_CTRL_BT_OWN_SPDT_CTRL);
@ -1025,6 +1030,11 @@ void ar9003_mci_2g5g_switch(struct ath_hw *ah, bool force)
if (!(mci->config & ATH_MCI_CONFIG_DISABLE_OSLA))
ar9003_mci_osla_setup(ah, true);
} else {
if (!force) {
ar9003_mci_send_lna_take(ah, true);
udelay(5);
}
REG_SET_BIT(ah, AR_MCI_TX_CTRL,
AR_MCI_TX_CTRL_DISABLE_LNA_UPDATE);
REG_SET_BIT(ah, AR_PHY_GLB_CONTROL,
@ -1251,6 +1261,9 @@ void ar9003_mci_bt_gain_ctrl(struct ath_hw *ah)
ath_dbg(common, MCI, "Give LNA and SPDT control to BT\n");
ar9003_mci_send_lna_take(ah, true);
udelay(50);
REG_SET_BIT(ah, AR_PHY_GLB_CONTROL, AR_BTCOEX_CTRL_BT_OWN_SPDT_CTRL);
mci->is_2g = false;
mci->update_2g5g = true;