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authorSenthil Balasubramanian <senthilkumar@atheros.com>2009-07-14 20:17:08 -0400
committerJohn W. Linville <linville@tuxdriver.com>2009-07-24 15:05:17 -0400
commitdd8b15b027d96f7097ae9dbaebd822a114a03c34 (patch)
tree580e0d651226724921b2c246d58da2057ab585f1 /drivers
parenta59b5a5e684652eec035c869ab8911a1689c8f53 (diff)
ath9k: RX stucks during heavy traffic in HT40 mode.
Running iperf along with p2p traffic on both TX and RX side then stop one side, then stop the other side, then start it up again, eventually the STA gets into a mode that it can not pass data at all. A hardware workaround for invalid RSSI can make FIFO write pointer to jump over read pointer, causing RX data corruption and repeated DMA. Both TX and RX works fine when the workaround is disabled. To replace the original hardware work around, software looks for frames with post delimiter CRC error and mark the RSSI invalid so that the upperlayer will not use the RSSI associated with this frame. So disable the hardware workaround by updating the appropriate registers. Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/wireless/ath/ath9k/eeprom.c20
-rw-r--r--drivers/net/wireless/ath/ath9k/initvals.h47
-rw-r--r--drivers/net/wireless/ath/ath9k/mac.c30
3 files changed, 67 insertions, 30 deletions
diff --git a/drivers/net/wireless/ath/ath9k/eeprom.c b/drivers/net/wireless/ath/ath9k/eeprom.c
index d82a0f97e6f..df41ed5fd7c 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom.c
@@ -1208,6 +1208,19 @@ static void ath9k_hw_4k_set_gain(struct ath_hw *ah,
pModal->xatten2Margin[0]);
REG_RMW_FIELD(ah, AR_PHY_GAIN_2GHZ + regChainOffset,
AR_PHY_GAIN_2GHZ_XATTEN2_DB, pModal->xatten2Db[0]);
+
+ /* Set the block 1 value to block 0 value */
+ REG_RMW_FIELD(ah, AR_PHY_GAIN_2GHZ + 0x1000,
+ AR_PHY_GAIN_2GHZ_XATTEN1_MARGIN,
+ pModal->bswMargin[0]);
+ REG_RMW_FIELD(ah, AR_PHY_GAIN_2GHZ + 0x1000,
+ AR_PHY_GAIN_2GHZ_XATTEN1_DB, pModal->bswAtten[0]);
+ REG_RMW_FIELD(ah, AR_PHY_GAIN_2GHZ + 0x1000,
+ AR_PHY_GAIN_2GHZ_XATTEN2_MARGIN,
+ pModal->xatten2Margin[0]);
+ REG_RMW_FIELD(ah, AR_PHY_GAIN_2GHZ + 0x1000,
+ AR_PHY_GAIN_2GHZ_XATTEN2_DB,
+ pModal->xatten2Db[0]);
}
REG_RMW_FIELD(ah, AR_PHY_RXGAIN + regChainOffset,
@@ -1215,6 +1228,11 @@ static void ath9k_hw_4k_set_gain(struct ath_hw *ah,
REG_RMW_FIELD(ah, AR_PHY_RXGAIN + regChainOffset,
AR9280_PHY_RXGAIN_TXRX_MARGIN, pModal->rxTxMarginCh[0]);
+ REG_RMW_FIELD(ah, AR_PHY_RXGAIN + 0x1000,
+ AR9280_PHY_RXGAIN_TXRX_ATTEN, txRxAttenLocal);
+ REG_RMW_FIELD(ah, AR_PHY_RXGAIN + 0x1000,
+ AR9280_PHY_RXGAIN_TXRX_MARGIN, pModal->rxTxMarginCh[0]);
+
if (AR_SREV_9285_11(ah))
REG_WRITE(ah, AR9285_AN_TOP4, (AR9285_AN_TOP4_DEFAULT | 0x14));
}
@@ -1239,7 +1257,7 @@ static void ath9k_hw_4k_set_board_values(struct ath_hw *ah,
ath9k_hw_4k_set_gain(ah, pModal, eep, txRxAttenLocal, 0);
/* Initialize Ant Diversity settings from EEPROM */
- if (pModal->version == 3) {
+ if (pModal->version >= 3) {
ant_div_control1 = ((pModal->ob_234 >> 12) & 0xf);
ant_div_control2 = ((pModal->db1_234 >> 12) & 0xf);
regVal = REG_READ(ah, 0x99ac);
diff --git a/drivers/net/wireless/ath/ath9k/initvals.h b/drivers/net/wireless/ath/ath9k/initvals.h
index e2f0a34b79a..f67a2a96cc5 100644
--- a/drivers/net/wireless/ath/ath9k/initvals.h
+++ b/drivers/net/wireless/ath/ath9k/initvals.h
@@ -2782,7 +2782,7 @@ static const u32 ar9280Common_9280_2[][2] = {
{ 0x00008338, 0x00ff0000 },
{ 0x0000833c, 0x00000000 },
{ 0x00008340, 0x000107ff },
- { 0x00008344, 0x00581043 },
+ { 0x00008344, 0x00481043 },
{ 0x00009808, 0x00000000 },
{ 0x0000980c, 0xafa68e30 },
{ 0x00009810, 0xfd14e000 },
@@ -3439,7 +3439,7 @@ static const u32 ar9280PciePhy_clkreq_always_on_L1_9280[][2] = {
{0x00004044, 0x00000000 },
};
-/* AR9285 */
+/* AR9285 Revsion 10*/
static const u_int32_t ar9285Modes_9285[][6] = {
{ 0x00001030, 0x00000230, 0x00000460, 0x000002c0, 0x00000160, 0x000001e0 },
{ 0x00001070, 0x00000168, 0x000002d0, 0x00000318, 0x0000018c, 0x000001e0 },
@@ -3955,7 +3955,7 @@ static const u_int32_t ar9285Common_9285[][2] = {
{ 0x00008338, 0x00000000 },
{ 0x0000833c, 0x00000000 },
{ 0x00008340, 0x00010380 },
- { 0x00008344, 0x00581043 },
+ { 0x00008344, 0x00481043 },
{ 0x00009808, 0x00000000 },
{ 0x0000980c, 0xafe68e30 },
{ 0x00009810, 0xfd14e000 },
@@ -4121,8 +4121,9 @@ static const u_int32_t ar9285PciePhy_clkreq_off_L1_9285[][2] = {
{0x00004044, 0x00000000 },
};
-/* AR9285 v1_2 PCI Register Writes. Created: 03/04/09 */
+/* AR9285 v1_2 PCI Register Writes. Created: 04/13/09 */
static const u_int32_t ar9285Modes_9285_1_2[][6] = {
+ /* Address 5G-HT20 5G-HT40 2G-HT40 2G-HT20 Turbo */
{ 0x00001030, 0x00000230, 0x00000460, 0x000002c0, 0x00000160, 0x000001e0 },
{ 0x00001070, 0x00000168, 0x000002d0, 0x00000318, 0x0000018c, 0x000001e0 },
{ 0x000010b0, 0x00000e60, 0x00001cc0, 0x00007c70, 0x00003e38, 0x00001180 },
@@ -4139,6 +4140,7 @@ static const u_int32_t ar9285Modes_9285_1_2[][6] = {
{ 0x00009840, 0x206a012e, 0x206a012e, 0x206a012e, 0x206a012e, 0x206a012e },
{ 0x00009844, 0x0372161e, 0x0372161e, 0x03721620, 0x03721620, 0x037216a0 },
{ 0x00009848, 0x00001066, 0x00001066, 0x00001053, 0x00001053, 0x00001059 },
+ { 0x0000a848, 0x00001066, 0x00001066, 0x00001053, 0x00001053, 0x00001059 },
{ 0x00009850, 0x6d4000e2, 0x6d4000e2, 0x6d4000e2, 0x6d4000e2, 0x6d4000e2 },
{ 0x00009858, 0x7ec84d2e, 0x7ec84d2e, 0x7ec84d2e, 0x7ec84d2e, 0x7ec84d2e },
{ 0x0000985c, 0x3139605e, 0x3139605e, 0x3137605e, 0x3137605e, 0x3139605e },
@@ -4419,6 +4421,7 @@ static const u_int32_t ar9285Modes_9285_1_2[][6] = {
{ 0x0000abfc, 0x00000000, 0x00000000, 0x000eb7db, 0x000eb7db, 0x00000000 },
{ 0x0000a204, 0x00000004, 0x00000004, 0x00000004, 0x00000004, 0x00000004 },
{ 0x0000a20c, 0x00000014, 0x00000014, 0x0001f000, 0x0001f000, 0x0001f000 },
+ { 0x0000b20c, 0x00000014, 0x00000014, 0x0001f000, 0x0001f000, 0x0001f000 },
{ 0x0000a21c, 0x1883800a, 0x1883800a, 0x1883800a, 0x1883800a, 0x1883800a },
{ 0x0000a230, 0x00000000, 0x00000000, 0x00000210, 0x00000108, 0x00000000 },
{ 0x0000a250, 0x0004f000, 0x0004f000, 0x0004a000, 0x0004a000, 0x0004a000 },
@@ -4618,7 +4621,7 @@ static const u_int32_t ar9285Common_9285_1_2[][2] = {
{ 0x00008338, 0x00ff0000 },
{ 0x0000833c, 0x00000000 },
{ 0x00008340, 0x00010380 },
- { 0x00008344, 0x00581043 },
+ { 0x00008344, 0x00481043 },
{ 0x00009808, 0x00000000 },
{ 0x0000980c, 0xafe68e30 },
{ 0x00009810, 0xfd14e000 },
@@ -4752,18 +4755,18 @@ static const u_int32_t ar9285Common_9285_1_2[][2] = {
static const u_int32_t ar9285Modes_high_power_tx_gain_9285_1_2[][6] = {
/* Address 5G-HT20 5G-HT40 2G-HT40 2G-HT20 Turbo */
{ 0x0000a300, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
- { 0x0000a304, 0x00000000, 0x00000000, 0x00005200, 0x00005200, 0x00000000 },
- { 0x0000a308, 0x00000000, 0x00000000, 0x00007201, 0x00007201, 0x00000000 },
+ { 0x0000a304, 0x00000000, 0x00000000, 0x00006200, 0x00006200, 0x00000000 },
+ { 0x0000a308, 0x00000000, 0x00000000, 0x00008201, 0x00008201, 0x00000000 },
{ 0x0000a30c, 0x00000000, 0x00000000, 0x0000b240, 0x0000b240, 0x00000000 },
{ 0x0000a310, 0x00000000, 0x00000000, 0x0000d241, 0x0000d241, 0x00000000 },
- { 0x0000a314, 0x00000000, 0x00000000, 0x0000f440, 0x0000f440, 0x00000000 },
- { 0x0000a318, 0x00000000, 0x00000000, 0x00014640, 0x00014640, 0x00000000 },
- { 0x0000a31c, 0x00000000, 0x00000000, 0x00018680, 0x00018680, 0x00000000 },
- { 0x0000a320, 0x00000000, 0x00000000, 0x00019841, 0x00019841, 0x00000000 },
- { 0x0000a324, 0x00000000, 0x00000000, 0x0001ca40, 0x0001ca40, 0x00000000 },
- { 0x0000a328, 0x00000000, 0x00000000, 0x0001fa80, 0x0001fa80, 0x00000000 },
- { 0x0000a32c, 0x00000000, 0x00000000, 0x00023ac0, 0x00023ac0, 0x00000000 },
- { 0x0000a330, 0x00000000, 0x00000000, 0x0002ab40, 0x0002ab40, 0x00000000 },
+ { 0x0000a314, 0x00000000, 0x00000000, 0x0000f600, 0x0000f600, 0x00000000 },
+ { 0x0000a318, 0x00000000, 0x00000000, 0x00012800, 0x00012800, 0x00000000 },
+ { 0x0000a31c, 0x00000000, 0x00000000, 0x00016802, 0x00016802, 0x00000000 },
+ { 0x0000a320, 0x00000000, 0x00000000, 0x0001b805, 0x0001b805, 0x00000000 },
+ { 0x0000a324, 0x00000000, 0x00000000, 0x00021a80, 0x00021a80, 0x00000000 },
+ { 0x0000a328, 0x00000000, 0x00000000, 0x00028b00, 0x00028b00, 0x00000000 },
+ { 0x0000a32c, 0x00000000, 0x00000000, 0x0002ab40, 0x0002ab40, 0x00000000 },
+ { 0x0000a330, 0x00000000, 0x00000000, 0x0002cd80, 0x0002cd80, 0x00000000 },
{ 0x0000a334, 0x00000000, 0x00000000, 0x00033d82, 0x00033d82, 0x00000000 },
{ 0x0000a338, 0x0003891e, 0x0003891e, 0x0003891e, 0x0003891e, 0x00000000 },
{ 0x0000a33c, 0x0003a95e, 0x0003a95e, 0x0003a95e, 0x0003a95e, 0x00000000 },
@@ -4776,13 +4779,13 @@ static const u_int32_t ar9285Modes_high_power_tx_gain_9285_1_2[][6] = {
{ 0x00007838, 0xfac68803, 0xfac68803, 0xfac68803, 0xfac68803, 0xfac68803 },
{ 0x0000786c, 0x08609ebe, 0x08609ebe, 0x08609ebe, 0x08609ebe, 0x08609ebe },
{ 0x00007820, 0x00000c00, 0x00000c00, 0x00000c00, 0x00000c00, 0x00000c00 },
- { 0x0000a274, 0x0a22a652, 0x0a22a652, 0x0a21a652, 0x0a21a652, 0x0a22a652 },
- { 0x0000a278, 0x1ce739ce, 0x1ce739ce, 0x1ce739ce, 0x1ce739ce, 0x1ce739ce },
- { 0x0000a27c, 0x050701ce, 0x050701ce, 0x050701ce, 0x050701ce, 0x050701ce },
- { 0x0000a394, 0x1ce739ce, 0x1ce739ce, 0x1ce739ce, 0x1ce739ce, 0x1ce739ce },
- { 0x0000a398, 0x000001ce, 0x000001ce, 0x000001ce, 0x000001ce, 0x000001ce },
- { 0x0000a3dc, 0x1ce739ce, 0x1ce739ce, 0x1ce739ce, 0x1ce739ce, 0x1ce739ce },
- { 0x0000a3e0, 0x000001ce, 0x000001ce, 0x000001ce, 0x000001ce, 0x000001ce },
+ { 0x0000a274, 0x0a22a652, 0x0a22a652, 0x0a216652, 0x0a216652, 0x0a22a652 },
+ { 0x0000a278, 0x0e739ce7, 0x0e739ce7, 0x0e739ce7, 0x0e739ce7, 0x0e739ce7 },
+ { 0x0000a27c, 0x050380e7, 0x050380e7, 0x050380e7, 0x050380e7, 0x050380e7 },
+ { 0x0000a394, 0x0e739ce7, 0x0e739ce7, 0x0e739ce7, 0x0e739ce7, 0x0e739ce7 },
+ { 0x0000a398, 0x000000e7, 0x000000e7, 0x000000e7, 0x000000e7, 0x000000e7 },
+ { 0x0000a3dc, 0x0e739ce7, 0x0e739ce7, 0x0e739ce7, 0x0e739ce7, 0x0e739ce7 },
+ { 0x0000a3e0, 0x000000e7, 0x000000e7, 0x000000e7, 0x000000e7, 0x000000e7 },
};
static const u_int32_t ar9285Modes_original_tx_gain_9285_1_2[][6] = {
diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
index 8ae4ec21667..6f923e31872 100644
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -825,13 +825,29 @@ int ath9k_hw_rxprocdesc(struct ath_hw *ah, struct ath_desc *ds,
ds->ds_rxstat.rs_datalen = ads.ds_rxstatus1 & AR_DataLen;
ds->ds_rxstat.rs_tstamp = ads.AR_RcvTimestamp;
- ds->ds_rxstat.rs_rssi = MS(ads.ds_rxstatus4, AR_RxRSSICombined);
- ds->ds_rxstat.rs_rssi_ctl0 = MS(ads.ds_rxstatus0, AR_RxRSSIAnt00);
- ds->ds_rxstat.rs_rssi_ctl1 = MS(ads.ds_rxstatus0, AR_RxRSSIAnt01);
- ds->ds_rxstat.rs_rssi_ctl2 = MS(ads.ds_rxstatus0, AR_RxRSSIAnt02);
- ds->ds_rxstat.rs_rssi_ext0 = MS(ads.ds_rxstatus4, AR_RxRSSIAnt10);
- ds->ds_rxstat.rs_rssi_ext1 = MS(ads.ds_rxstatus4, AR_RxRSSIAnt11);
- ds->ds_rxstat.rs_rssi_ext2 = MS(ads.ds_rxstatus4, AR_RxRSSIAnt12);
+ if (ads.ds_rxstatus8 & AR_PostDelimCRCErr) {
+ ds->ds_rxstat.rs_rssi = ATH9K_RSSI_BAD;
+ ds->ds_rxstat.rs_rssi_ctl0 = ATH9K_RSSI_BAD;
+ ds->ds_rxstat.rs_rssi_ctl1 = ATH9K_RSSI_BAD;
+ ds->ds_rxstat.rs_rssi_ctl2 = ATH9K_RSSI_BAD;
+ ds->ds_rxstat.rs_rssi_ext0 = ATH9K_RSSI_BAD;
+ ds->ds_rxstat.rs_rssi_ext1 = ATH9K_RSSI_BAD;
+ ds->ds_rxstat.rs_rssi_ext2 = ATH9K_RSSI_BAD;
+ } else {
+ ds->ds_rxstat.rs_rssi = MS(ads.ds_rxstatus4, AR_RxRSSICombined);
+ ds->ds_rxstat.rs_rssi_ctl0 = MS(ads.ds_rxstatus0,
+ AR_RxRSSIAnt00);
+ ds->ds_rxstat.rs_rssi_ctl1 = MS(ads.ds_rxstatus0,
+ AR_RxRSSIAnt01);
+ ds->ds_rxstat.rs_rssi_ctl2 = MS(ads.ds_rxstatus0,
+ AR_RxRSSIAnt02);
+ ds->ds_rxstat.rs_rssi_ext0 = MS(ads.ds_rxstatus4,
+ AR_RxRSSIAnt10);
+ ds->ds_rxstat.rs_rssi_ext1 = MS(ads.ds_rxstatus4,
+ AR_RxRSSIAnt11);
+ ds->ds_rxstat.rs_rssi_ext2 = MS(ads.ds_rxstatus4,
+ AR_RxRSSIAnt12);
+ }
if (ads.ds_rxstatus8 & AR_RxKeyIdxValid)
ds->ds_rxstat.rs_keyix = MS(ads.ds_rxstatus8, AR_KeyIdx);
else