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Commit 4ff6a9d2 authored by Rajkumar Manoharan's avatar Rajkumar Manoharan Committed by John W. Linville
Browse files

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: default avatarRajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 0967d862

drivers/net/wireless/ath/ath9k/ar9003_mci.c

+15 −2
Original line number Diff line number Diff line
@@ -1015,9 +1015,14 @@ void ar9003_mci_2g5g_switch(struct ath_hw *ah, bool force) 
		return;



	if (mci->is_2g) {

		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;