ath9k: Add open loop power control support for AR9287.
[pandora-kernel.git] / drivers / net / wireless / ath / ath9k / hw.c
index 1579c94..125e689 100644 (file)
@@ -380,12 +380,15 @@ static const char *ath9k_hw_devname(u16 devid)
                return "Atheros 9280";
        case AR9285_DEVID_PCIE:
                return "Atheros 9285";
+       case AR5416_DEVID_AR9287_PCI:
+       case AR5416_DEVID_AR9287_PCIE:
+               return "Atheros 9287";
        }
 
        return NULL;
 }
 
-static void ath9k_hw_set_defaults(struct ath_hw *ah)
+static void ath9k_hw_init_config(struct ath_hw *ah)
 {
        int i;
 
@@ -404,7 +407,7 @@ static void ath9k_hw_set_defaults(struct ath_hw *ah)
        ah->config.cck_trig_high = 200;
        ah->config.cck_trig_low = 100;
        ah->config.enable_ani = 1;
-       ah->config.diversity_control = 0;
+       ah->config.diversity_control = ATH9K_ANT_VARIABLE;
        ah->config.antenna_switch_swap = 0;
 
        for (i = 0; i < AR_EEPROM_MODAL_SPURS; i++) {
@@ -434,27 +437,14 @@ static void ath9k_hw_set_defaults(struct ath_hw *ah)
                ah->config.serialize_regmode = SER_REG_MODE_AUTO;
 }
 
-static struct ath_hw *ath9k_hw_newstate(u16 devid, struct ath_softc *sc,
-                                       int *status)
+static void ath9k_hw_init_defaults(struct ath_hw *ah)
 {
-       struct ath_hw *ah;
-
-       ah = kzalloc(sizeof(struct ath_hw), GFP_KERNEL);
-       if (ah == NULL) {
-               DPRINTF(sc, ATH_DBG_FATAL,
-                       "Cannot allocate memory for state block\n");
-               *status = -ENOMEM;
-               return NULL;
-       }
-
-       ah->ah_sc = sc;
        ah->hw_version.magic = AR5416_MAGIC;
        ah->regulatory.country_code = CTRY_DEFAULT;
-       ah->hw_version.devid = devid;
        ah->hw_version.subvendorid = 0;
 
        ah->ah_flags = 0;
-       if ((devid == AR5416_AR9100_DEVID))
+       if (ah->hw_version.devid == AR5416_AR9100_DEVID)
                ah->hw_version.macVersion = AR_SREV_VERSION_9100;
        if (!AR_SREV_9100(ah))
                ah->ah_flags = AH_USE_EEPROM;
@@ -462,9 +452,6 @@ static struct ath_hw *ath9k_hw_newstate(u16 devid, struct ath_softc *sc,
        ah->regulatory.power_limit = MAX_RATE_POWER;
        ah->regulatory.tp_scale = ATH9K_TP_SCALE_MAX;
        ah->atim_window = 0;
-       ah->diversity_control = ah->config.diversity_control;
-       ah->antenna_switch_swap =
-               ah->config.antenna_switch_swap;
        ah->sta_id1_defaults = AR_STA_ID1_CRPT_MIC_ENABLE;
        ah->beacon_interval = 100;
        ah->enable_32kHz_clock = DONT_USE_32KHZ;
@@ -475,7 +462,7 @@ static struct ath_hw *ath9k_hw_newstate(u16 devid, struct ath_softc *sc,
 
        ah->gbeacon_rate = 0;
 
-       return ah;
+       ah->power_mode = ATH9K_PM_UNDEFINED;
 }
 
 static int ath9k_hw_rfattach(struct ath_hw *ah)
@@ -588,7 +575,7 @@ static void ath9k_hw_init_txgain_ini(struct ath_hw *ah)
        }
 }
 
-static int ath9k_hw_post_attach(struct ath_hw *ah)
+static int ath9k_hw_post_init(struct ath_hw *ah)
 {
        int ecode;
 
@@ -599,7 +586,7 @@ static int ath9k_hw_post_attach(struct ath_hw *ah)
        if (ecode != 0)
                return ecode;
 
-       ecode = ath9k_hw_eeprom_attach(ah);
+       ecode = ath9k_hw_eeprom_init(ah);
        if (ecode != 0)
                return ecode;
 
@@ -612,70 +599,52 @@ static int ath9k_hw_post_attach(struct ath_hw *ah)
 
        if (!AR_SREV_9100(ah)) {
                ath9k_hw_ani_setup(ah);
-               ath9k_hw_ani_attach(ah);
+               ath9k_hw_ani_init(ah);
        }
 
        return 0;
 }
 
-static struct ath_hw *ath9k_hw_do_attach(u16 devid, struct ath_softc *sc,
-                                        int *status)
+static bool ath9k_hw_devid_supported(u16 devid)
 {
-       struct ath_hw *ah;
-       int ecode;
-       u32 i, j;
-
-       ah = ath9k_hw_newstate(devid, sc, status);
-       if (ah == NULL)
-               return NULL;
-
-       ath9k_hw_set_defaults(ah);
-
-       if (!ath9k_hw_set_reset_reg(ah, ATH9K_RESET_POWER_ON)) {
-               DPRINTF(sc, ATH_DBG_FATAL, "Couldn't reset chip\n");
-               ecode = -EIO;
-               goto bad;
-       }
-
-       if (!ath9k_hw_setpower(ah, ATH9K_PM_AWAKE)) {
-               DPRINTF(sc, ATH_DBG_FATAL, "Couldn't wakeup chip\n");
-               ecode = -EIO;
-               goto bad;
-       }
-
-       if (ah->config.serialize_regmode == SER_REG_MODE_AUTO) {
-               if (ah->hw_version.macVersion == AR_SREV_VERSION_5416_PCI ||
-                   (AR_SREV_9280(ah) && !ah->is_pciexpress)) {
-                       ah->config.serialize_regmode =
-                               SER_REG_MODE_ON;
-               } else {
-                       ah->config.serialize_regmode =
-                               SER_REG_MODE_OFF;
-               }
-       }
-
-       DPRINTF(sc, ATH_DBG_RESET, "serialize_regmode is %d\n",
-               ah->config.serialize_regmode);
-
-       if ((ah->hw_version.macVersion != AR_SREV_VERSION_5416_PCI) &&
-           (ah->hw_version.macVersion != AR_SREV_VERSION_5416_PCIE) &&
-           (ah->hw_version.macVersion != AR_SREV_VERSION_9160) &&
-           (!AR_SREV_9100(ah)) && (!AR_SREV_9280(ah)) && (!AR_SREV_9285(ah))) {
-               DPRINTF(sc, ATH_DBG_FATAL,
-                       "Mac Chip Rev 0x%02x.%x is not supported by "
-                       "this driver\n", ah->hw_version.macVersion,
-                       ah->hw_version.macRev);
-               ecode = -EOPNOTSUPP;
-               goto bad;
+       switch (devid) {
+       case AR5416_DEVID_PCI:
+       case AR5416_DEVID_PCIE:
+       case AR5416_AR9100_DEVID:
+       case AR9160_DEVID_PCI:
+       case AR9280_DEVID_PCI:
+       case AR9280_DEVID_PCIE:
+       case AR9285_DEVID_PCIE:
+       case AR5416_DEVID_AR9287_PCI:
+       case AR5416_DEVID_AR9287_PCIE:
+               return true;
+       default:
+               break;
        }
+       return false;
+}
 
-       if (AR_SREV_9100(ah)) {
-               ah->iq_caldata.calData = &iq_cal_multi_sample;
-               ah->supp_cals = IQ_MISMATCH_CAL;
-               ah->is_pciexpress = false;
+static bool ath9k_hw_macversion_supported(u32 macversion)
+{
+       switch (macversion) {
+       case AR_SREV_VERSION_5416_PCI:
+       case AR_SREV_VERSION_5416_PCIE:
+       case AR_SREV_VERSION_9160:
+       case AR_SREV_VERSION_9100:
+       case AR_SREV_VERSION_9280:
+       case AR_SREV_VERSION_9285:
+       case AR_SREV_VERSION_9287:
+               return true;
+       /* Not yet */
+       case AR_SREV_VERSION_9271:
+       default:
+               break;
        }
-       ah->hw_version.phyRev = REG_READ(ah, AR_PHY_CHIP_ID);
+       return false;
+}
 
+static void ath9k_hw_init_cal_settings(struct ath_hw *ah)
+{
        if (AR_SREV_9160_10_OR_LATER(ah)) {
                if (AR_SREV_9280_10_OR_LATER(ah)) {
                        ah->iq_caldata.calData = &iq_cal_single_sample;
@@ -696,12 +665,49 @@ static struct ath_hw *ath9k_hw_do_attach(u16 devid, struct ath_softc *sc,
                }
                ah->supp_cals = ADC_GAIN_CAL | ADC_DC_CAL | IQ_MISMATCH_CAL;
        }
+}
 
-       ah->ani_function = ATH9K_ANI_ALL;
-       if (AR_SREV_9280_10_OR_LATER(ah))
-               ah->ani_function &= ~ATH9K_ANI_NOISE_IMMUNITY_LEVEL;
+static void ath9k_hw_init_mode_regs(struct ath_hw *ah)
+{
+       if (AR_SREV_9271(ah)) {
+               INIT_INI_ARRAY(&ah->iniModes, ar9271Modes_9271_1_0,
+                              ARRAY_SIZE(ar9271Modes_9271_1_0), 6);
+               INIT_INI_ARRAY(&ah->iniCommon, ar9271Common_9271_1_0,
+                              ARRAY_SIZE(ar9271Common_9271_1_0), 2);
+               return;
+       }
+
+       if (AR_SREV_9287_11_OR_LATER(ah)) {
+               INIT_INI_ARRAY(&ah->iniModes, ar9287Modes_9287_1_1,
+                               ARRAY_SIZE(ar9287Modes_9287_1_1), 6);
+               INIT_INI_ARRAY(&ah->iniCommon, ar9287Common_9287_1_1,
+                               ARRAY_SIZE(ar9287Common_9287_1_1), 2);
+               if (ah->config.pcie_clock_req)
+                       INIT_INI_ARRAY(&ah->iniPcieSerdes,
+                       ar9287PciePhy_clkreq_off_L1_9287_1_1,
+                       ARRAY_SIZE(ar9287PciePhy_clkreq_off_L1_9287_1_1), 2);
+               else
+                       INIT_INI_ARRAY(&ah->iniPcieSerdes,
+                       ar9287PciePhy_clkreq_always_on_L1_9287_1_1,
+                       ARRAY_SIZE(ar9287PciePhy_clkreq_always_on_L1_9287_1_1),
+                                       2);
+       } else if (AR_SREV_9287_10_OR_LATER(ah)) {
+               INIT_INI_ARRAY(&ah->iniModes, ar9287Modes_9287_1_0,
+                               ARRAY_SIZE(ar9287Modes_9287_1_0), 6);
+               INIT_INI_ARRAY(&ah->iniCommon, ar9287Common_9287_1_0,
+                               ARRAY_SIZE(ar9287Common_9287_1_0), 2);
+
+               if (ah->config.pcie_clock_req)
+                       INIT_INI_ARRAY(&ah->iniPcieSerdes,
+                       ar9287PciePhy_clkreq_off_L1_9287_1_0,
+                       ARRAY_SIZE(ar9287PciePhy_clkreq_off_L1_9287_1_0), 2);
+               else
+                       INIT_INI_ARRAY(&ah->iniPcieSerdes,
+                       ar9287PciePhy_clkreq_always_on_L1_9287_1_0,
+                       ARRAY_SIZE(ar9287PciePhy_clkreq_always_on_L1_9287_1_0),
+                                 2);
+       } else if (AR_SREV_9285_12_OR_LATER(ah)) {
 
-       if (AR_SREV_9285_12_OR_LATER(ah)) {
 
                INIT_INI_ARRAY(&ah->iniModes, ar9285Modes_9285_1_2,
                               ARRAY_SIZE(ar9285Modes_9285_1_2), 6);
@@ -832,17 +838,32 @@ static struct ath_hw *ath9k_hw_do_attach(u16 devid, struct ath_softc *sc,
                INIT_INI_ARRAY(&ah->iniAddac, ar5416Addac,
                               ARRAY_SIZE(ar5416Addac), 2);
        }
+}
 
-       if (ah->is_pciexpress)
-               ath9k_hw_configpcipowersave(ah, 0);
-       else
-               ath9k_hw_disablepcie(ah);
-
-       ecode = ath9k_hw_post_attach(ah);
-       if (ecode != 0)
-               goto bad;
+static void ath9k_hw_init_mode_gain_regs(struct ath_hw *ah)
+{
+       if (AR_SREV_9287_11(ah))
+               INIT_INI_ARRAY(&ah->iniModesRxGain,
+               ar9287Modes_rx_gain_9287_1_1,
+               ARRAY_SIZE(ar9287Modes_rx_gain_9287_1_1), 6);
+       else if (AR_SREV_9287_10(ah))
+               INIT_INI_ARRAY(&ah->iniModesRxGain,
+               ar9287Modes_rx_gain_9287_1_0,
+               ARRAY_SIZE(ar9287Modes_rx_gain_9287_1_0), 6);
+       else if (AR_SREV_9280_20(ah))
+               ath9k_hw_init_rxgain_ini(ah);
 
-       if (AR_SREV_9285_12_OR_LATER(ah)) {
+       if (AR_SREV_9287_11(ah)) {
+               INIT_INI_ARRAY(&ah->iniModesTxGain,
+               ar9287Modes_tx_gain_9287_1_1,
+               ARRAY_SIZE(ar9287Modes_tx_gain_9287_1_1), 6);
+       } else if (AR_SREV_9287_10(ah)) {
+               INIT_INI_ARRAY(&ah->iniModesTxGain,
+               ar9287Modes_tx_gain_9287_1_0,
+               ARRAY_SIZE(ar9287Modes_tx_gain_9287_1_0), 6);
+       } else if (AR_SREV_9280_20(ah)) {
+               ath9k_hw_init_txgain_ini(ah);
+       } else if (AR_SREV_9285_12_OR_LATER(ah)) {
                u32 txgain_type = ah->eep_ops->get_eeprom(ah, EEP_TXGAIN_TYPE);
 
                /* txgain table */
@@ -857,16 +878,11 @@ static struct ath_hw *ath9k_hw_do_attach(u16 devid, struct ath_softc *sc,
                }
 
        }
+}
 
-       /* rxgain table */
-       if (AR_SREV_9280_20(ah))
-               ath9k_hw_init_rxgain_ini(ah);
-
-       /* txgain table */
-       if (AR_SREV_9280_20(ah))
-               ath9k_hw_init_txgain_ini(ah);
-
-       ath9k_hw_fill_cap_info(ah);
+static void ath9k_hw_init_11a_eeprom_fix(struct ath_hw *ah)
+{
+       u32 i, j;
 
        if ((ah->hw_version.devid == AR9280_DEVID_PCI) &&
            test_bit(ATH9K_MODE_11A, ah->caps.wireless_modes)) {
@@ -885,29 +901,97 @@ static struct ath_hw *ath9k_hw_do_attach(u16 devid, struct ath_softc *sc,
                        }
                }
        }
+}
+
+int ath9k_hw_init(struct ath_hw *ah)
+{
+       int r = 0;
+
+       if (!ath9k_hw_devid_supported(ah->hw_version.devid))
+               return -EOPNOTSUPP;
+
+       ath9k_hw_init_defaults(ah);
+       ath9k_hw_init_config(ah);
+
+       if (!ath9k_hw_set_reset_reg(ah, ATH9K_RESET_POWER_ON)) {
+               DPRINTF(ah->ah_sc, ATH_DBG_FATAL, "Couldn't reset chip\n");
+               return -EIO;
+       }
 
-       ecode = ath9k_hw_init_macaddr(ah);
-       if (ecode != 0) {
-               DPRINTF(sc, ATH_DBG_FATAL,
+       if (!ath9k_hw_setpower(ah, ATH9K_PM_AWAKE)) {
+               DPRINTF(ah->ah_sc, ATH_DBG_FATAL, "Couldn't wakeup chip\n");
+               return -EIO;
+       }
+
+       if (ah->config.serialize_regmode == SER_REG_MODE_AUTO) {
+               if (ah->hw_version.macVersion == AR_SREV_VERSION_5416_PCI ||
+                   (AR_SREV_9280(ah) && !ah->is_pciexpress)) {
+                       ah->config.serialize_regmode =
+                               SER_REG_MODE_ON;
+               } else {
+                       ah->config.serialize_regmode =
+                               SER_REG_MODE_OFF;
+               }
+       }
+
+       DPRINTF(ah->ah_sc, ATH_DBG_RESET, "serialize_regmode is %d\n",
+               ah->config.serialize_regmode);
+
+       if (!ath9k_hw_macversion_supported(ah->hw_version.macVersion)) {
+               DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
+                       "Mac Chip Rev 0x%02x.%x is not supported by "
+                       "this driver\n", ah->hw_version.macVersion,
+                       ah->hw_version.macRev);
+               return -EOPNOTSUPP;
+       }
+
+       if (AR_SREV_9100(ah)) {
+               ah->iq_caldata.calData = &iq_cal_multi_sample;
+               ah->supp_cals = IQ_MISMATCH_CAL;
+               ah->is_pciexpress = false;
+       }
+
+       if (AR_SREV_9271(ah))
+               ah->is_pciexpress = false;
+
+       ah->hw_version.phyRev = REG_READ(ah, AR_PHY_CHIP_ID);
+
+       ath9k_hw_init_cal_settings(ah);
+
+       ah->ani_function = ATH9K_ANI_ALL;
+       if (AR_SREV_9280_10_OR_LATER(ah))
+               ah->ani_function &= ~ATH9K_ANI_NOISE_IMMUNITY_LEVEL;
+
+       ath9k_hw_init_mode_regs(ah);
+
+       if (ah->is_pciexpress)
+               ath9k_hw_configpcipowersave(ah, 0);
+       else
+               ath9k_hw_disablepcie(ah);
+
+       r = ath9k_hw_post_init(ah);
+       if (r)
+               return r;
+
+       ath9k_hw_init_mode_gain_regs(ah);
+       ath9k_hw_fill_cap_info(ah);
+       ath9k_hw_init_11a_eeprom_fix(ah);
+
+       r = ath9k_hw_init_macaddr(ah);
+       if (r) {
+               DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
                        "Failed to initialize MAC address\n");
-               goto bad;
+               return r;
        }
 
-       if (AR_SREV_9285(ah))
+       if (AR_SREV_9285(ah) || AR_SREV_9271(ah))
                ah->tx_trig_level = (AR_FTRIG_256B >> AR_FTRIG_S);
        else
                ah->tx_trig_level = (AR_FTRIG_512B >> AR_FTRIG_S);
 
        ath9k_init_nfcal_hist_buffer(ah);
 
-       return ah;
-bad:
-       if (ah)
-               ath9k_hw_detach(ah);
-       if (status)
-               *status = ecode;
-
-       return NULL;
+       return 0;
 }
 
 static void ath9k_hw_init_bb(struct ath_hw *ah,
@@ -1146,33 +1230,12 @@ const char *ath9k_hw_probe(u16 vendorid, u16 devid)
 void ath9k_hw_detach(struct ath_hw *ah)
 {
        if (!AR_SREV_9100(ah))
-               ath9k_hw_ani_detach(ah);
+               ath9k_hw_ani_disable(ah);
 
-       ath9k_hw_rfdetach(ah);
+       ath9k_hw_rf_free(ah);
        ath9k_hw_setpower(ah, ATH9K_PM_FULL_SLEEP);
        kfree(ah);
-}
-
-struct ath_hw *ath9k_hw_attach(u16 devid, struct ath_softc *sc, int *error)
-{
-       struct ath_hw *ah = NULL;
-
-       switch (devid) {
-       case AR5416_DEVID_PCI:
-       case AR5416_DEVID_PCIE:
-       case AR5416_AR9100_DEVID:
-       case AR9160_DEVID_PCI:
-       case AR9280_DEVID_PCI:
-       case AR9280_DEVID_PCIE:
-       case AR9285_DEVID_PCIE:
-               ah = ath9k_hw_do_attach(devid, sc, error);
-               break;
-       default:
-               *error = -ENXIO;
-               break;
-       }
-
-       return ah;
+       ah = NULL;
 }
 
 /*******/
@@ -1182,6 +1245,27 @@ struct ath_hw *ath9k_hw_attach(u16 devid, struct ath_softc *sc, int *error)
 static void ath9k_hw_override_ini(struct ath_hw *ah,
                                  struct ath9k_channel *chan)
 {
+       u32 val;
+
+       if (AR_SREV_9271(ah)) {
+               /*
+                * Enable spectral scan to solution for issues with stuck
+                * beacons on AR9271 1.0. The beacon stuck issue is not seeon on
+                * AR9271 1.1
+                */
+               if (AR_SREV_9271_10(ah)) {
+                       val = REG_READ(ah, AR_PHY_SPECTRAL_SCAN) | AR_PHY_SPECTRAL_SCAN_ENABLE;
+                       REG_WRITE(ah, AR_PHY_SPECTRAL_SCAN, val);
+               }
+               else if (AR_SREV_9271_11(ah))
+                       /*
+                        * change AR_PHY_RF_CTL3 setting to fix MAC issue
+                        * present on AR9271 1.1
+                        */
+                       REG_WRITE(ah, AR_PHY_RF_CTL3, 0x3a020001);
+               return;
+       }
+
        /*
         * Set the RX_ABORT and RX_DIS and clear if off only after
         * RXE is set for MAC. This prevents frames with corrupted
@@ -1193,7 +1277,10 @@ static void ath9k_hw_override_ini(struct ath_hw *ah,
        if (!AR_SREV_5416_20_OR_LATER(ah) ||
            AR_SREV_9280_10_OR_LATER(ah))
                return;
-
+       /*
+        * Disable BB clock gating
+        * Necessary to avoid issues on AR5416 2.0
+        */
        REG_WRITE(ah, 0x9800 + (651 << 2), 0x11);
 }
 
@@ -1245,11 +1332,21 @@ static void ath9k_olc_init(struct ath_hw *ah)
 {
        u32 i;
 
-       for (i = 0; i < AR9280_TX_GAIN_TABLE_SIZE; i++)
-               ah->originalGain[i] =
-                       MS(REG_READ(ah, AR_PHY_TX_GAIN_TBL1 + i * 4),
-                                       AR_PHY_TX_GAIN);
-       ah->PDADCdelta = 0;
+       if (OLC_FOR_AR9287_10_LATER) {
+               REG_SET_BIT(ah, AR_PHY_TX_PWRCTRL9,
+                               AR_PHY_TX_PWRCTRL9_RES_DC_REMOVAL);
+               ath9k_hw_analog_shift_rmw(ah, AR9287_AN_TXPC0,
+                               AR9287_AN_TXPC0_TXPCMODE,
+                               AR9287_AN_TXPC0_TXPCMODE_S,
+                               AR9287_AN_TXPC0_TXPCMODE_TEMPSENSE);
+               udelay(100);
+       } else {
+               for (i = 0; i < AR9280_TX_GAIN_TABLE_SIZE; i++)
+                       ah->originalGain[i] =
+                               MS(REG_READ(ah, AR_PHY_TX_GAIN_TBL1 + i * 4),
+                                               AR_PHY_TX_GAIN);
+               ah->PDADCdelta = 0;
+       }
 }
 
 static u32 ath9k_regd_get_ctl(struct ath_regulatory *reg,
@@ -1341,10 +1438,11 @@ static int ath9k_hw_process_ini(struct ath_hw *ah,
                DO_DELAY(regWrites);
        }
 
-       if (AR_SREV_9280(ah))
+       if (AR_SREV_9280(ah) || AR_SREV_9287_10_OR_LATER(ah))
                REG_WRITE_ARRAY(&ah->iniModesRxGain, modesIndex, regWrites);
 
-       if (AR_SREV_9280(ah) || AR_SREV_9285_12_OR_LATER(ah))
+       if (AR_SREV_9280(ah) || AR_SREV_9285_12_OR_LATER(ah) ||
+           AR_SREV_9287_10_OR_LATER(ah))
                REG_WRITE_ARRAY(&ah->iniModesTxGain, modesIndex, regWrites);
 
        for (i = 0; i < ah->iniCommon.ia_rows; i++) {
@@ -1424,23 +1522,48 @@ static inline void ath9k_hw_set_dma(struct ath_hw *ah)
 {
        u32 regval;
 
+       /*
+        * set AHB_MODE not to do cacheline prefetches
+       */
        regval = REG_READ(ah, AR_AHB_MODE);
        REG_WRITE(ah, AR_AHB_MODE, regval | AR_AHB_PREFETCH_RD_EN);
 
+       /*
+        * let mac dma reads be in 128 byte chunks
+        */
        regval = REG_READ(ah, AR_TXCFG) & ~AR_TXCFG_DMASZ_MASK;
        REG_WRITE(ah, AR_TXCFG, regval | AR_TXCFG_DMASZ_128B);
 
+       /*
+        * Restore TX Trigger Level to its pre-reset value.
+        * The initial value depends on whether aggregation is enabled, and is
+        * adjusted whenever underruns are detected.
+        */
        REG_RMW_FIELD(ah, AR_TXCFG, AR_FTRIG, ah->tx_trig_level);
 
+       /*
+        * let mac dma writes be in 128 byte chunks
+        */
        regval = REG_READ(ah, AR_RXCFG) & ~AR_RXCFG_DMASZ_MASK;
        REG_WRITE(ah, AR_RXCFG, regval | AR_RXCFG_DMASZ_128B);
 
+       /*
+        * Setup receive FIFO threshold to hold off TX activities
+        */
        REG_WRITE(ah, AR_RXFIFO_CFG, 0x200);
 
+       /*
+        * reduce the number of usable entries in PCU TXBUF to avoid
+        * wrap around issues.
+        */
        if (AR_SREV_9285(ah)) {
+               /* For AR9285 the number of Fifos are reduced to half.
+                * So set the usable tx buf size also to half to
+                * avoid data/delimiter underruns
+                */
                REG_WRITE(ah, AR_PCU_TXBUF_CTRL,
                          AR_9285_PCU_TXBUF_CTRL_USABLE_SIZE);
-       } else {
+       } else if (!AR_SREV_9271(ah)) {
                REG_WRITE(ah, AR_PCU_TXBUF_CTRL,
                          AR_PCU_TXBUF_CTRL_USABLE_SIZE);
        }
@@ -2186,6 +2309,18 @@ static void ath9k_hw_spur_mitigate(struct ath_hw *ah, struct ath9k_channel *chan
        REG_WRITE(ah, AR_PHY_MASK2_P_61_45, tmp_mask);
 }
 
+static void ath9k_enable_rfkill(struct ath_hw *ah)
+{
+       REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
+                   AR_GPIO_INPUT_EN_VAL_RFSILENT_BB);
+
+       REG_CLR_BIT(ah, AR_GPIO_INPUT_MUX2,
+                   AR_GPIO_INPUT_MUX2_RFSILENT);
+
+       ath9k_hw_cfg_gpio_input(ah, ah->rfkill_gpio);
+       REG_SET_BIT(ah, AR_PHY_TEST, RFSILENT_BB);
+}
+
 int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
                    bool bChannelChange)
 {
@@ -2234,14 +2369,39 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
 
        ath9k_hw_mark_phy_inactive(ah);
 
+       if (AR_SREV_9271(ah) && ah->htc_reset_init) {
+               REG_WRITE(ah,
+                         AR9271_RESET_POWER_DOWN_CONTROL,
+                         AR9271_RADIO_RF_RST);
+               udelay(50);
+       }
+
        if (!ath9k_hw_chip_reset(ah, chan)) {
                DPRINTF(ah->ah_sc, ATH_DBG_FATAL, "Chip reset failed\n");
                return -EINVAL;
        }
 
+       if (AR_SREV_9271(ah) && ah->htc_reset_init) {
+               ah->htc_reset_init = false;
+               REG_WRITE(ah,
+                         AR9271_RESET_POWER_DOWN_CONTROL,
+                         AR9271_GATE_MAC_CTL);
+               udelay(50);
+       }
+
        if (AR_SREV_9280_10_OR_LATER(ah))
                REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL, AR_GPIO_JTAG_DISABLE);
 
+       if (AR_SREV_9287_10_OR_LATER(ah)) {
+               /* Enable ASYNC FIFO */
+               REG_SET_BIT(ah, AR_MAC_PCU_ASYNC_FIFO_REG3,
+                               AR_MAC_PCU_ASYNC_FIFO_REG3_DATAPATH_SEL);
+               REG_SET_BIT(ah, AR_PHY_MODE, AR_PHY_MODE_ASYNCFIFO);
+               REG_CLR_BIT(ah, AR_MAC_PCU_ASYNC_FIFO_REG3,
+                               AR_MAC_PCU_ASYNC_FIFO_REG3_SOFT_RESET);
+               REG_SET_BIT(ah, AR_MAC_PCU_ASYNC_FIFO_REG3,
+                               AR_MAC_PCU_ASYNC_FIFO_REG3_SOFT_RESET);
+       }
        r = ath9k_hw_process_ini(ah, chan, sc->tx_chan_width);
        if (r)
                return r;
@@ -2313,12 +2473,32 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
        ath9k_hw_init_interrupt_masks(ah, ah->opmode);
        ath9k_hw_init_qos(ah);
 
-#if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
        if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
                ath9k_enable_rfkill(ah);
-#endif
+
        ath9k_hw_init_user_settings(ah);
 
+       if (AR_SREV_9287_10_OR_LATER(ah)) {
+               REG_WRITE(ah, AR_D_GBL_IFS_SIFS,
+                         AR_D_GBL_IFS_SIFS_ASYNC_FIFO_DUR);
+               REG_WRITE(ah, AR_D_GBL_IFS_SLOT,
+                         AR_D_GBL_IFS_SLOT_ASYNC_FIFO_DUR);
+               REG_WRITE(ah, AR_D_GBL_IFS_EIFS,
+                         AR_D_GBL_IFS_EIFS_ASYNC_FIFO_DUR);
+
+               REG_WRITE(ah, AR_TIME_OUT, AR_TIME_OUT_ACK_CTS_ASYNC_FIFO_DUR);
+               REG_WRITE(ah, AR_USEC, AR_USEC_ASYNC_FIFO_DUR);
+
+               REG_SET_BIT(ah, AR_MAC_PCU_LOGIC_ANALYZER,
+                           AR_MAC_PCU_LOGIC_ANALYZER_DISBUG20768);
+               REG_RMW_FIELD(ah, AR_AHB_MODE, AR_AHB_CUSTOM_BURST_EN,
+                             AR_AHB_CUSTOM_BURST_ASYNC_FIFO_VAL);
+       }
+       if (AR_SREV_9287_10_OR_LATER(ah)) {
+               REG_SET_BIT(ah, AR_PCU_MISC_MODE2,
+                               AR_PCU_MISC_MODE2_ENABLE_AGGWEP);
+       }
+
        REG_WRITE(ah, AR_STA_ID1,
                  REG_READ(ah, AR_STA_ID1) | AR_STA_ID1_PRESERVE_SEQNUM);
 
@@ -2334,7 +2514,7 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
        ath9k_hw_init_bb(ah, chan);
 
        if (!ath9k_hw_init_cal(ah, chan))
-               return -EIO;;
+               return -EIO;
 
        rx_chainmask = ah->rxchainmask;
        if ((rx_chainmask == 0x5) || (rx_chainmask == 0x3)) {
@@ -2344,6 +2524,9 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
 
        REG_WRITE(ah, AR_CFG_LED, saveLedState | AR_CFG_SCLK_32KHZ);
 
+       /*
+        * For big endian systems turn on swapping for descriptors
+        */
        if (AR_SREV_9100(ah)) {
                u32 mask;
                mask = REG_READ(ah, AR_CFG);
@@ -2358,8 +2541,12 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
                                "Setting CFG 0x%x\n", REG_READ(ah, AR_CFG));
                }
        } else {
+               /* Configure AR9271 target WLAN */
+                if (AR_SREV_9271(ah))
+                       REG_WRITE(ah, AR_CFG, AR_CFG_SWRB | AR_CFG_SWTB);
 #ifdef __BIG_ENDIAN
-               REG_WRITE(ah, AR_CFG, AR_CFG_SWTD | AR_CFG_SWRD);
+                else
+                       REG_WRITE(ah, AR_CFG, AR_CFG_SWTD | AR_CFG_SWRD);
 #endif
        }
 
@@ -2401,9 +2588,6 @@ bool ath9k_hw_keyreset(struct ath_hw *ah, u16 entry)
 
        }
 
-       if (ah->curchan == NULL)
-               return true;
-
        return true;
 }
 
@@ -2717,7 +2901,8 @@ static bool ath9k_hw_set_power_awake(struct ath_hw *ah, int setChip)
        return true;
 }
 
-bool ath9k_hw_setpower(struct ath_hw *ah, enum ath9k_power_mode mode)
+static bool ath9k_hw_setpower_nolock(struct ath_hw *ah,
+                                    enum ath9k_power_mode mode)
 {
        int status = true, setChip = true;
        static const char *modes[] = {
@@ -2727,6 +2912,9 @@ bool ath9k_hw_setpower(struct ath_hw *ah, enum ath9k_power_mode mode)
                "UNDEFINED"
        };
 
+       if (ah->power_mode == mode)
+               return status;
+
        DPRINTF(ah->ah_sc, ATH_DBG_RESET, "%s -> %s\n",
                modes[ah->power_mode], modes[mode]);
 
@@ -2751,6 +2939,51 @@ bool ath9k_hw_setpower(struct ath_hw *ah, enum ath9k_power_mode mode)
        return status;
 }
 
+bool ath9k_hw_setpower(struct ath_hw *ah, enum ath9k_power_mode mode)
+{
+       unsigned long flags;
+       bool ret;
+
+       spin_lock_irqsave(&ah->ah_sc->sc_pm_lock, flags);
+       ret = ath9k_hw_setpower_nolock(ah, mode);
+       spin_unlock_irqrestore(&ah->ah_sc->sc_pm_lock, flags);
+
+       return ret;
+}
+
+void ath9k_ps_wakeup(struct ath_softc *sc)
+{
+       unsigned long flags;
+
+       spin_lock_irqsave(&sc->sc_pm_lock, flags);
+       if (++sc->ps_usecount != 1)
+               goto unlock;
+
+       ath9k_hw_setpower_nolock(sc->sc_ah, ATH9K_PM_AWAKE);
+
+ unlock:
+       spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
+}
+
+void ath9k_ps_restore(struct ath_softc *sc)
+{
+       unsigned long flags;
+
+       spin_lock_irqsave(&sc->sc_pm_lock, flags);
+       if (--sc->ps_usecount != 0)
+               goto unlock;
+
+       if (sc->ps_enabled &&
+           !(sc->sc_flags & (SC_OP_WAIT_FOR_BEACON |
+                             SC_OP_WAIT_FOR_CAB |
+                             SC_OP_WAIT_FOR_PSPOLL_DATA |
+                             SC_OP_WAIT_FOR_TX_ACK)))
+               ath9k_hw_setpower_nolock(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);
+
+ unlock:
+       spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
+}
+
 /*
  * Helper for ASPM support.
  *
@@ -2779,7 +3012,7 @@ void ath9k_hw_configpcipowersave(struct ath_hw *ah, int restore)
                /*
                 * AR9280 2.0 or later chips use SerDes values from the
                 * initvals.h initialized depending on chipset during
-                * ath9k_hw_do_attach()
+                * ath9k_hw_init()
                 */
                for (i = 0; i < ah->iniPcieSerdes.ia_rows; i++) {
                        REG_WRITE(ah, INI_RA(&ah->iniPcieSerdes, i, 0),
@@ -2840,7 +3073,7 @@ void ath9k_hw_configpcipowersave(struct ath_hw *ah, int restore)
        if (ah->config.pcie_waen) {
                REG_WRITE(ah, AR_WA, ah->config.pcie_waen);
        } else {
-               if (AR_SREV_9285(ah))
+               if (AR_SREV_9285(ah) || AR_SREV_9271(ah))
                        REG_WRITE(ah, AR_WA, AR9285_WA_DEFAULT);
                /*
                 * On AR9280 chips bit 22 of 0x4004 needs to be set to
@@ -3010,11 +3243,6 @@ bool ath9k_hw_getisr(struct ath_hw *ah, enum ath9k_int *masked)
        return true;
 }
 
-enum ath9k_int ath9k_hw_intrget(struct ath_hw *ah)
-{
-       return ah->mask_reg;
-}
-
 enum ath9k_int ath9k_hw_set_interrupts(struct ath_hw *ah, enum ath9k_int ints)
 {
        u32 omask = ah->mask_reg;
@@ -3294,7 +3522,6 @@ void ath9k_hw_fill_cap_info(struct ath_hw *ah)
        }
 
        if (eeval & AR5416_OPFLAGS_11G) {
-               set_bit(ATH9K_MODE_11B, pCap->wireless_modes);
                set_bit(ATH9K_MODE_11G, pCap->wireless_modes);
                if (ah->config.ht_enable) {
                        if (!(eeval & AR5416_OPFLAGS_N_2G_HT20))
@@ -3310,10 +3537,17 @@ void ath9k_hw_fill_cap_info(struct ath_hw *ah)
        }
 
        pCap->tx_chainmask = ah->eep_ops->get_eeprom(ah, EEP_TX_MASK);
+       /*
+        * For AR9271 we will temporarilly uses the rx chainmax as read from
+        * the EEPROM.
+        */
        if ((ah->hw_version.devid == AR5416_DEVID_PCI) &&
-           !(eeval & AR5416_OPFLAGS_11A))
+           !(eeval & AR5416_OPFLAGS_11A) &&
+           !(AR_SREV_9271(ah)))
+               /* CB71: GPIO 0 is pulled down to indicate 3 rx chains */
                pCap->rx_chainmask = ath9k_hw_gpio_get(ah, 0) ? 0x5 : 0x7;
        else
+               /* Use rx_chainmask from EEPROM. */
                pCap->rx_chainmask = ah->eep_ops->get_eeprom(ah, EEP_RX_MASK);
 
        if (!(AR_SREV_9280(ah) && (ah->hw_version.macRev == 0)))
@@ -3584,7 +3818,9 @@ u32 ath9k_hw_gpio_get(struct ath_hw *ah, u32 gpio)
        if (gpio >= ah->caps.num_gpio_pins)
                return 0xffffffff;
 
-       if (AR_SREV_9285_10_OR_LATER(ah))
+       if (AR_SREV_9287_10_OR_LATER(ah))
+               return MS_REG_READ(AR9287, gpio) != 0;
+       else if (AR_SREV_9285_10_OR_LATER(ah))
                return MS_REG_READ(AR9285, gpio) != 0;
        else if (AR_SREV_9280_10_OR_LATER(ah))
                return MS_REG_READ(AR928X, gpio) != 0;
@@ -3613,20 +3849,6 @@ void ath9k_hw_set_gpio(struct ath_hw *ah, u32 gpio, u32 val)
                AR_GPIO_BIT(gpio));
 }
 
-#if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
-void ath9k_enable_rfkill(struct ath_hw *ah)
-{
-       REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
-                   AR_GPIO_INPUT_EN_VAL_RFSILENT_BB);
-
-       REG_CLR_BIT(ah, AR_GPIO_INPUT_MUX2,
-                   AR_GPIO_INPUT_MUX2_RFSILENT);
-
-       ath9k_hw_cfg_gpio_input(ah, ah->rfkill_gpio);
-       REG_SET_BIT(ah, AR_PHY_TEST, RFSILENT_BB);
-}
-#endif
-
 u32 ath9k_hw_getdefantenna(struct ath_hw *ah)
 {
        return REG_READ(ah, AR_DEF_ANTENNA) & 0x7;
@@ -3676,7 +3898,7 @@ bool ath9k_hw_setantennaswitch(struct ath_hw *ah,
                        break;
                }
        } else {
-               ah->diversity_control = settings;
+               ah->config.diversity_control = settings;
        }
 
        return true;
@@ -3794,29 +4016,22 @@ void ath9k_hw_settsf64(struct ath_hw *ah, u64 tsf64)
 
 void ath9k_hw_reset_tsf(struct ath_hw *ah)
 {
-       int count;
+       ath9k_ps_wakeup(ah->ah_sc);
+       if (!ath9k_hw_wait(ah, AR_SLP32_MODE, AR_SLP32_TSF_WRITE_STATUS, 0,
+                          AH_TSF_WRITE_TIMEOUT))
+               DPRINTF(ah->ah_sc, ATH_DBG_RESET,
+                       "AR_SLP32_TSF_WRITE_STATUS limit exceeded\n");
 
-       count = 0;
-       while (REG_READ(ah, AR_SLP32_MODE) & AR_SLP32_TSF_WRITE_STATUS) {
-               count++;
-               if (count > 10) {
-                       DPRINTF(ah->ah_sc, ATH_DBG_RESET,
-                               "AR_SLP32_TSF_WRITE_STATUS limit exceeded\n");
-                       break;
-               }
-               udelay(10);
-       }
        REG_WRITE(ah, AR_RESET_TSF, AR_RESET_TSF_ONCE);
+       ath9k_ps_restore(ah->ah_sc);
 }
 
-bool ath9k_hw_set_tsfadjust(struct ath_hw *ah, u32 setting)
+void ath9k_hw_set_tsfadjust(struct ath_hw *ah, u32 setting)
 {
        if (setting)
                ah->misc_mode |= AR_PCU_TX_ADD_TSF;
        else
                ah->misc_mode &= ~AR_PCU_TX_ADD_TSF;
-
-       return true;
 }
 
 bool ath9k_hw_setslottime(struct ath_hw *ah, u32 us)