ath9k: Add open loop power control support for AR9287.
[pandora-kernel.git] / drivers / net / wireless / ath / ath9k / hw.c
index 301ef04..125e689 100644 (file)
@@ -388,7 +388,7 @@ static const char *ath9k_hw_devname(u16 devid)
        return NULL;
 }
 
-static void ath9k_hw_set_defaults(struct ath_hw *ah)
+static void ath9k_hw_init_config(struct ath_hw *ah)
 {
        int i;
 
@@ -407,7 +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++) {
@@ -437,7 +437,7 @@ static void ath9k_hw_set_defaults(struct ath_hw *ah)
                ah->config.serialize_regmode = SER_REG_MODE_AUTO;
 }
 
-static void ath9k_hw_newstate(struct ath_hw *ah)
+static void ath9k_hw_init_defaults(struct ath_hw *ah)
 {
        ah->hw_version.magic = AR5416_MAGIC;
        ah->regulatory.country_code = CTRY_DEFAULT;
@@ -452,9 +452,6 @@ static void ath9k_hw_newstate(struct ath_hw *ah)
        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;
@@ -578,7 +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;
 
@@ -589,7 +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;
 
@@ -602,7 +599,7 @@ 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;
@@ -627,46 +624,9 @@ static bool ath9k_hw_devid_supported(u16 devid)
        return false;
 }
 
-int ath9k_hw_attach(struct ath_hw *ah)
+static bool ath9k_hw_macversion_supported(u32 macversion)
 {
-       int r;
-       u32 i, j;
-
-       if (!ath9k_hw_devid_supported(ah->hw_version.devid)) {
-               r = -EOPNOTSUPP;
-               goto bad;
-       }
-
-       ath9k_hw_newstate(ah);
-       ath9k_hw_set_defaults(ah);
-
-       if (!ath9k_hw_set_reset_reg(ah, ATH9K_RESET_POWER_ON)) {
-               DPRINTF(ah->ah_sc, ATH_DBG_FATAL, "Couldn't reset chip\n");
-               r = -EIO;
-               goto bad;
-       }
-
-       if (!ath9k_hw_setpower(ah, ATH9K_PM_AWAKE)) {
-               DPRINTF(ah->ah_sc, ATH_DBG_FATAL, "Couldn't wakeup chip\n");
-               r = -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(ah->ah_sc, ATH_DBG_RESET, "serialize_regmode is %d\n",
-               ah->config.serialize_regmode);
-
-       switch (ah->hw_version.macVersion) {
+       switch (macversion) {
        case AR_SREV_VERSION_5416_PCI:
        case AR_SREV_VERSION_5416_PCIE:
        case AR_SREV_VERSION_9160:
@@ -674,23 +634,17 @@ int ath9k_hw_attach(struct ath_hw *ah)
        case AR_SREV_VERSION_9280:
        case AR_SREV_VERSION_9285:
        case AR_SREV_VERSION_9287:
-               break;
+               return true;
+       /* Not yet */
+       case AR_SREV_VERSION_9271:
        default:
-               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);
-               r = -EOPNOTSUPP;
-               goto bad;
-       }
-
-       if (AR_SREV_9100(ah)) {
-               ah->iq_caldata.calData = &iq_cal_multi_sample;
-               ah->supp_cals = IQ_MISMATCH_CAL;
-               ah->is_pciexpress = false;
+               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;
@@ -711,10 +665,18 @@ int ath9k_hw_attach(struct ath_hw *ah)
                }
                ah->supp_cals = ADC_GAIN_CAL | ADC_DC_CAL | IQ_MISMATCH_CAL;
        }
+}
+
+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;
+       }
 
-       ah->ani_function = ATH9K_ANI_ALL;
-       if (AR_SREV_9280_10_OR_LATER(ah))
-               ah->ani_function &= ~ATH9K_ANI_NOISE_IMMUNITY_LEVEL;
        if (AR_SREV_9287_11_OR_LATER(ah)) {
                INIT_INI_ARRAY(&ah->iniModes, ar9287Modes_9287_1_1,
                                ARRAY_SIZE(ar9287Modes_9287_1_1), 6);
@@ -876,16 +838,10 @@ int ath9k_hw_attach(struct ath_hw *ah)
                INIT_INI_ARRAY(&ah->iniAddac, ar5416Addac,
                               ARRAY_SIZE(ar5416Addac), 2);
        }
+}
 
-       if (ah->is_pciexpress)
-               ath9k_hw_configpcipowersave(ah, 0);
-       else
-               ath9k_hw_disablepcie(ah);
-
-       r = ath9k_hw_post_attach(ah);
-       if (r)
-               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,
@@ -922,8 +878,11 @@ int ath9k_hw_attach(struct ath_hw *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)) {
@@ -942,15 +901,90 @@ int ath9k_hw_attach(struct ath_hw *ah)
                        }
                }
        }
+}
+
+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;
+       }
+
+       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);
@@ -958,9 +992,6 @@ int ath9k_hw_attach(struct ath_hw *ah)
        ath9k_init_nfcal_hist_buffer(ah);
 
        return 0;
-bad:
-       ath9k_hw_detach(ah);
-       return r;
 }
 
 static void ath9k_hw_init_bb(struct ath_hw *ah,
@@ -1199,11 +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);
+       ah = NULL;
 }
 
 /*******/
@@ -1213,6 +1245,27 @@ void ath9k_hw_detach(struct ath_hw *ah)
 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
@@ -1224,7 +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);
 }
 
@@ -1276,11 +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,
@@ -1456,23 +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);
        }
@@ -2278,11 +2369,26 @@ 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);
 
@@ -2418,6 +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);
@@ -2432,8 +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
        }
 
@@ -2475,9 +2588,6 @@ bool ath9k_hw_keyreset(struct ath_hw *ah, u16 entry)
 
        }
 
-       if (ah->curchan == NULL)
-               return true;
-
        return true;
 }
 
@@ -2902,7 +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_attach()
+                * ath9k_hw_init()
                 */
                for (i = 0; i < ah->iniPcieSerdes.ia_rows; i++) {
                        REG_WRITE(ah, INI_RA(&ah->iniPcieSerdes, i, 0),
@@ -2963,7 +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
@@ -3427,10 +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)))
@@ -3781,7 +3898,7 @@ bool ath9k_hw_setantennaswitch(struct ath_hw *ah,
                        break;
                }
        } else {
-               ah->diversity_control = settings;
+               ah->config.diversity_control = settings;
        }
 
        return true;
@@ -3909,14 +4026,12 @@ void ath9k_hw_reset_tsf(struct ath_hw *ah)
        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)