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			80 lines
		
	
	
		
			2.1 KiB
		
	
	
	
		
			Diff
		
	
	
	
	
	
			
		
		
	
	
			80 lines
		
	
	
		
			2.1 KiB
		
	
	
	
		
			Diff
		
	
	
	
	
	
--- a/drivers/net/wireless/ath/ath9k/hw.c
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+++ b/drivers/net/wireless/ath/ath9k/hw.c
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@@ -245,6 +245,19 @@ void ath9k_hw_get_channel_centers(struct
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 		centers->synth_center + (extoff * HT40_CHANNEL_CENTER_SHIFT);
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 }
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+static inline void ath9k_hw_disable_pll_lock_detect(struct ath_hw *ah)
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+{
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+	/* On AR9330 and AR9340 devices, some PHY registers must be
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+	 * tuned to gain better stability/performance. These registers
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+	 * might be changed while doing wlan reset so the registers must
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+	 * be reprogrammed after each reset.
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+	 */
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+	REG_CLR_BIT(ah, AR_PHY_USB_CTRL1, BIT(20));
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+	REG_RMW(ah, AR_PHY_USB_CTRL2,
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+		(1 << 21) | (0xf << 22),
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+		(1 << 21) | (0x3 << 22));
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+}
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+
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 /******************/
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 /* Chip Revisions */
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 /******************/
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@@ -1381,6 +1394,9 @@ static bool ath9k_hw_set_reset(struct at
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 	if (AR_SREV_9100(ah))
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 		udelay(50);
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+	if (AR_SREV_9330(ah) || AR_SREV_9340(ah))
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+		ath9k_hw_disable_pll_lock_detect(ah);
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+
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 	return true;
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 }
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@@ -1480,6 +1496,9 @@ static bool ath9k_hw_chip_reset(struct a
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 		ar9003_hw_internal_regulator_apply(ah);
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 	ath9k_hw_init_pll(ah, chan);
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+	if (AR_SREV_9330(ah) || AR_SREV_9340(ah))
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+		ath9k_hw_disable_pll_lock_detect(ah);
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+
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 	return true;
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 }
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@@ -1781,8 +1800,14 @@ static int ath9k_hw_do_fastcc(struct ath
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 	if (AR_SREV_9271(ah))
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 		ar9002_hw_load_ani_reg(ah, chan);
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+	if (AR_SREV_9330(ah) || AR_SREV_9340(ah))
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+		ath9k_hw_disable_pll_lock_detect(ah);
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+
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 	return 0;
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 fail:
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+	if (AR_SREV_9330(ah) || AR_SREV_9340(ah))
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+		ath9k_hw_disable_pll_lock_detect(ah);
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+
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 	return -EINVAL;
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 }
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@@ -2036,6 +2061,9 @@ int ath9k_hw_reset(struct ath_hw *ah, st
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 		ath9k_hw_set_radar_params(ah);
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 	}
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+	if (AR_SREV_9330(ah) || AR_SREV_9340(ah))
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+		ath9k_hw_disable_pll_lock_detect(ah);
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+
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 	return 0;
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 }
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 EXPORT_SYMBOL(ath9k_hw_reset);
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--- a/drivers/net/wireless/ath/ath9k/phy.h
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+++ b/drivers/net/wireless/ath/ath9k/phy.h
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@@ -48,6 +48,9 @@
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 #define AR_PHY_PLL_CONTROL 0x16180
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 #define AR_PHY_PLL_MODE 0x16184
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+#define AR_PHY_USB_CTRL1	0x16c84
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+#define AR_PHY_USB_CTRL2	0x16c88
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+
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 enum ath9k_ant_div_comb_lna_conf {
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 	ATH_ANT_DIV_COMB_LNA1_MINUS_LNA2,
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 	ATH_ANT_DIV_COMB_LNA2,
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