ath9k_hw: ASPM interoperability fix for AR9380/AR9382

There is an interoperability with AR9382/AR9380 in L1 state with a
few root complexes which can cause a hang. This is fixed by
setting some work around bits on the PCIE PHY. We fix by using
a new ini array to modify these bits when the radio is idle.

Cc: stable@kernel.org
Cc: Jack Lee <jack.lee@atheros.com>
Cc: Carl Huang <carl.huang@atheros.com>
Cc: David Quan <david.quan@atheros.com>
Cc: Nael Atallah <nael.atallah@atheros.com>
Cc: Sarvesh Shrivastava <sarvesh.shrivastava@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_2p2_initvals.h b/drivers/net/wireless/ath/ath9k/ar9003_2p2_initvals.h
index 81f9cf2..9ecca93 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/ar9003_2p2_initvals.h
+++ b/drivers/net/wireless/ath/ath9k/ar9003_2p2_initvals.h
@@ -1842,7 +1842,7 @@ static const u32 ar9300_2p2_soc_preamble[][2] = {
 
 static const u32 ar9300PciePhy_pll_on_clkreq_disable_L1_2p2[][2] = {
        /* Addr      allmodes  */
-       {0x00004040, 0x08212e5e},
+       {0x00004040, 0x0821265e},
        {0x00004040, 0x0008003b},
        {0x00004044, 0x00000000},
 };

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_hw.c b/drivers/net/wireless/ath/ath9k/ar9003_hw.c
index 6137634..06fb2c8 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/ar9003_hw.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_hw.c
@@ -146,8 +146,8 @@ static void ar9003_hw_init_mode_regs(struct ath_hw *ah)
                /* Sleep Setting */
 
                INIT_INI_ARRAY(&ah->iniPcieSerdesLowPower,
-                               ar9300PciePhy_clkreq_enable_L1_2p2,
-                               ARRAY_SIZE(ar9300PciePhy_clkreq_enable_L1_2p2),
+                               ar9300PciePhy_pll_on_clkreq_disable_L1_2p2,
+                               ARRAY_SIZE(ar9300PciePhy_pll_on_clkreq_disable_L1_2p2),
                                2);
 
                /* Fast clock modal settings */