- patches.suse/slab-handle-memoryless-nodes-v2a.patch: Refresh.
[linux-flexiantxendom0-3.2.10.git] / drivers / net / wireless / ath / ath9k / phy.c
index 63bf9a3..c3b5939 100644 (file)
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include "ath9k.h"
+/**
+ * DOC: Programming Atheros 802.11n analog front end radios
+ *
+ * AR5416 MAC based PCI devices and AR518 MAC based PCI-Express
+ * devices have either an external AR2133 analog front end radio for single
+ * band 2.4 GHz communication or an AR5133 analog front end radio for dual
+ * band 2.4 GHz / 5 GHz communication.
+ *
+ * All devices after the AR5416 and AR5418 family starting with the AR9280
+ * have their analog front radios, MAC/BB and host PCIe/USB interface embedded
+ * into a single-chip and require less programming.
+ *
+ * The following single-chips exist with a respective embedded radio:
+ *
+ * AR9280 - 11n dual-band 2x2 MIMO for PCIe
+ * AR9281 - 11n single-band 1x2 MIMO for PCIe
+ * AR9285 - 11n single-band 1x1 for PCIe
+ * AR9287 - 11n single-band 2x2 MIMO for PCIe
+ *
+ * AR9220 - 11n dual-band 2x2 MIMO for PCI
+ * AR9223 - 11n single-band 2x2 MIMO for PCI
+ *
+ * AR9287 - 11n single-band 1x1 MIMO for USB
+ */
 
-void
-ath9k_hw_write_regs(struct ath_hw *ah, u32 modesIndex, u32 freqIndex,
-                   int regWrites)
-{
-       REG_WRITE_ARRAY(&ah->iniBB_RfGain, freqIndex, regWrites);
-}
+#include "hw.h"
 
-bool
-ath9k_hw_set_channel(struct ath_hw *ah, struct ath9k_channel *chan)
+/**
+ * ath9k_hw_write_regs - ??
+ *
+ * @ah: atheros hardware structure
+ * @freqIndex:
+ * @regWrites:
+ *
+ * Used for both the chipsets with an external AR2133/AR5133 radios and
+ * single-chip devices.
+ */
+void ath9k_hw_write_regs(struct ath_hw *ah, u32 freqIndex, int regWrites)
 {
-       u32 channelSel = 0;
-       u32 bModeSynth = 0;
-       u32 aModeRefSel = 0;
-       u32 reg32 = 0;
-       u16 freq;
-       struct chan_centers centers;
-
-       ath9k_hw_get_channel_centers(ah, chan, &centers);
-       freq = centers.synth_center;
-
-       if (freq < 4800) {
-               u32 txctl;
-
-               if (((freq - 2192) % 5) == 0) {
-                       channelSel = ((freq - 672) * 2 - 3040) / 10;
-                       bModeSynth = 0;
-               } else if (((freq - 2224) % 5) == 0) {
-                       channelSel = ((freq - 704) * 2 - 3040) / 10;
-                       bModeSynth = 1;
-               } else {
-                       DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
-                               "Invalid channel %u MHz\n", freq);
-                       return false;
-               }
-
-               channelSel = (channelSel << 2) & 0xff;
-               channelSel = ath9k_hw_reverse_bits(channelSel, 8);
-
-               txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
-               if (freq == 2484) {
-
-                       REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
-                                 txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
-               } else {
-                       REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
-                                 txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
-               }
-
-       } else if ((freq % 20) == 0 && freq >= 5120) {
-               channelSel =
-                   ath9k_hw_reverse_bits(((freq - 4800) / 20 << 2), 8);
-               aModeRefSel = ath9k_hw_reverse_bits(1, 2);
-       } else if ((freq % 10) == 0) {
-               channelSel =
-                   ath9k_hw_reverse_bits(((freq - 4800) / 10 << 1), 8);
-               if (AR_SREV_9100(ah) || AR_SREV_9160_10_OR_LATER(ah))
-                       aModeRefSel = ath9k_hw_reverse_bits(2, 2);
-               else
-                       aModeRefSel = ath9k_hw_reverse_bits(1, 2);
-       } else if ((freq % 5) == 0) {
-               channelSel = ath9k_hw_reverse_bits((freq - 4800) / 5, 8);
-               aModeRefSel = ath9k_hw_reverse_bits(1, 2);
-       } else {
-               DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
-                       "Invalid channel %u MHz\n", freq);
-               return false;
-       }
-
-       reg32 =
-           (channelSel << 8) | (aModeRefSel << 2) | (bModeSynth << 1) |
-           (1 << 5) | 0x1;
-
-       REG_WRITE(ah, AR_PHY(0x37), reg32);
-
-       ah->curchan = chan;
-       ah->curchan_rad_index = -1;
-
-       return true;
+       REG_WRITE_ARRAY(&ah->iniBB_RfGain, freqIndex, regWrites);
 }
 
-void ath9k_hw_ar9280_set_channel(struct ath_hw *ah,
-                                struct ath9k_channel *chan)
+/**
+ * ath9k_hw_ar9280_set_channel - set channel on single-chip device
+ * @ah: atheros hardware structure
+ * @chan:
+ *
+ * This is the function to change channel on single-chip devices, that is
+ * all devices after ar9280.
+ *
+ * This function takes the channel value in MHz and sets
+ * hardware channel value. Assumes writes have been enabled to analog bus.
+ *
+ * Actual Expression,
+ *
+ * For 2GHz channel,
+ * Channel Frequency = (3/4) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^17)
+ * (freq_ref = 40MHz)
+ *
+ * For 5GHz channel,
+ * Channel Frequency = (3/2) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^10)
+ * (freq_ref = 40MHz/(24>>amodeRefSel))
+ */
+int ath9k_hw_ar9280_set_channel(struct ath_hw *ah, struct ath9k_channel *chan)
 {
        u16 bMode, fracMode, aModeRefSel = 0;
        u32 freq, ndiv, channelSel = 0, channelFrac = 0, reg32 = 0;
@@ -110,22 +90,34 @@ void ath9k_hw_ar9280_set_channel(struct ath_hw *ah,
        reg32 = REG_READ(ah, AR_PHY_SYNTH_CONTROL);
        reg32 &= 0xc0000000;
 
-       if (freq < 4800) {
+       if (freq < 4800) { /* 2 GHz, fractional mode */
                u32 txctl;
+               int regWrites = 0;
 
                bMode = 1;
                fracMode = 1;
                aModeRefSel = 0;
                channelSel = (freq * 0x10000) / 15;
 
-               txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
-               if (freq == 2484) {
-
-                       REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
-                                 txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
+               if (AR_SREV_9287_11_OR_LATER(ah)) {
+                       if (freq == 2484) {
+                               /* Enable channel spreading for channel 14 */
+                               REG_WRITE_ARRAY(&ah->iniCckfirJapan2484,
+                                               1, regWrites);
+                       } else {
+                               REG_WRITE_ARRAY(&ah->iniCckfirNormal,
+                                               1, regWrites);
+                       }
                } else {
-                       REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
-                                 txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
+                       txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
+                       if (freq == 2484) {
+                               /* Enable channel spreading for channel 14 */
+                               REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
+                                         txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
+                       } else {
+                               REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
+                                         txctl &~ AR_PHY_CCK_TX_CTRL_JAPAN);
+                       }
                }
        } else {
                bMode = 0;
@@ -143,10 +135,15 @@ void ath9k_hw_ar9280_set_channel(struct ath_hw *ah,
                case 1:
                default:
                        aModeRefSel = 0;
+                       /*
+                        * Enable 2G (fractional) mode for channels
+                        * which are 5MHz spaced.
+                        */
                        fracMode = 1;
                        refDivA = 1;
                        channelSel = (freq * 0x8000) / 15;
 
+                       /* RefDivA setting */
                        REG_RMW_FIELD(ah, AR_AN_SYNTH9,
                                      AR_AN_SYNTH9_REFDIVA, refDivA);
 
@@ -168,12 +165,284 @@ void ath9k_hw_ar9280_set_channel(struct ath_hw *ah,
 
        ah->curchan = chan;
        ah->curchan_rad_index = -1;
+
+       return 0;
+}
+
+/**
+ * ath9k_hw_9280_spur_mitigate - convert baseband spur frequency
+ * @ah: atheros hardware structure
+ * @chan:
+ *
+ * For single-chip solutions. Converts to baseband spur frequency given the
+ * input channel frequency and compute register settings below.
+ */
+void ath9k_hw_9280_spur_mitigate(struct ath_hw *ah, struct ath9k_channel *chan)
+{
+       int bb_spur = AR_NO_SPUR;
+       int freq;
+       int bin, cur_bin;
+       int bb_spur_off, spur_subchannel_sd;
+       int spur_freq_sd;
+       int spur_delta_phase;
+       int denominator;
+       int upper, lower, cur_vit_mask;
+       int tmp, newVal;
+       int i;
+       int pilot_mask_reg[4] = { AR_PHY_TIMING7, AR_PHY_TIMING8,
+                         AR_PHY_PILOT_MASK_01_30, AR_PHY_PILOT_MASK_31_60
+       };
+       int chan_mask_reg[4] = { AR_PHY_TIMING9, AR_PHY_TIMING10,
+                        AR_PHY_CHANNEL_MASK_01_30, AR_PHY_CHANNEL_MASK_31_60
+       };
+       int inc[4] = { 0, 100, 0, 0 };
+       struct chan_centers centers;
+
+       int8_t mask_m[123];
+       int8_t mask_p[123];
+       int8_t mask_amt;
+       int tmp_mask;
+       int cur_bb_spur;
+       bool is2GHz = IS_CHAN_2GHZ(chan);
+
+       memset(&mask_m, 0, sizeof(int8_t) * 123);
+       memset(&mask_p, 0, sizeof(int8_t) * 123);
+
+       ath9k_hw_get_channel_centers(ah, chan, &centers);
+       freq = centers.synth_center;
+
+       ah->config.spurmode = SPUR_ENABLE_EEPROM;
+       for (i = 0; i < AR_EEPROM_MODAL_SPURS; i++) {
+               cur_bb_spur = ah->eep_ops->get_spur_channel(ah, i, is2GHz);
+
+               if (is2GHz)
+                       cur_bb_spur = (cur_bb_spur / 10) + AR_BASE_FREQ_2GHZ;
+               else
+                       cur_bb_spur = (cur_bb_spur / 10) + AR_BASE_FREQ_5GHZ;
+
+               if (AR_NO_SPUR == cur_bb_spur)
+                       break;
+               cur_bb_spur = cur_bb_spur - freq;
+
+               if (IS_CHAN_HT40(chan)) {
+                       if ((cur_bb_spur > -AR_SPUR_FEEQ_BOUND_HT40) &&
+                           (cur_bb_spur < AR_SPUR_FEEQ_BOUND_HT40)) {
+                               bb_spur = cur_bb_spur;
+                               break;
+                       }
+               } else if ((cur_bb_spur > -AR_SPUR_FEEQ_BOUND_HT20) &&
+                          (cur_bb_spur < AR_SPUR_FEEQ_BOUND_HT20)) {
+                       bb_spur = cur_bb_spur;
+                       break;
+               }
+       }
+
+       if (AR_NO_SPUR == bb_spur) {
+               REG_CLR_BIT(ah, AR_PHY_FORCE_CLKEN_CCK,
+                           AR_PHY_FORCE_CLKEN_CCK_MRC_MUX);
+               return;
+       } else {
+               REG_CLR_BIT(ah, AR_PHY_FORCE_CLKEN_CCK,
+                           AR_PHY_FORCE_CLKEN_CCK_MRC_MUX);
+       }
+
+       bin = bb_spur * 320;
+
+       tmp = REG_READ(ah, AR_PHY_TIMING_CTRL4(0));
+
+       newVal = tmp | (AR_PHY_TIMING_CTRL4_ENABLE_SPUR_RSSI |
+                       AR_PHY_TIMING_CTRL4_ENABLE_SPUR_FILTER |
+                       AR_PHY_TIMING_CTRL4_ENABLE_CHAN_MASK |
+                       AR_PHY_TIMING_CTRL4_ENABLE_PILOT_MASK);
+       REG_WRITE(ah, AR_PHY_TIMING_CTRL4(0), newVal);
+
+       newVal = (AR_PHY_SPUR_REG_MASK_RATE_CNTL |
+                 AR_PHY_SPUR_REG_ENABLE_MASK_PPM |
+                 AR_PHY_SPUR_REG_MASK_RATE_SELECT |
+                 AR_PHY_SPUR_REG_ENABLE_VIT_SPUR_RSSI |
+                 SM(SPUR_RSSI_THRESH, AR_PHY_SPUR_REG_SPUR_RSSI_THRESH));
+       REG_WRITE(ah, AR_PHY_SPUR_REG, newVal);
+
+       if (IS_CHAN_HT40(chan)) {
+               if (bb_spur < 0) {
+                       spur_subchannel_sd = 1;
+                       bb_spur_off = bb_spur + 10;
+               } else {
+                       spur_subchannel_sd = 0;
+                       bb_spur_off = bb_spur - 10;
+               }
+       } else {
+               spur_subchannel_sd = 0;
+               bb_spur_off = bb_spur;
+       }
+
+       if (IS_CHAN_HT40(chan))
+               spur_delta_phase =
+                       ((bb_spur * 262144) /
+                        10) & AR_PHY_TIMING11_SPUR_DELTA_PHASE;
+       else
+               spur_delta_phase =
+                       ((bb_spur * 524288) /
+                        10) & AR_PHY_TIMING11_SPUR_DELTA_PHASE;
+
+       denominator = IS_CHAN_2GHZ(chan) ? 44 : 40;
+       spur_freq_sd = ((bb_spur_off * 2048) / denominator) & 0x3ff;
+
+       newVal = (AR_PHY_TIMING11_USE_SPUR_IN_AGC |
+                 SM(spur_freq_sd, AR_PHY_TIMING11_SPUR_FREQ_SD) |
+                 SM(spur_delta_phase, AR_PHY_TIMING11_SPUR_DELTA_PHASE));
+       REG_WRITE(ah, AR_PHY_TIMING11, newVal);
+
+       newVal = spur_subchannel_sd << AR_PHY_SFCORR_SPUR_SUBCHNL_SD_S;
+       REG_WRITE(ah, AR_PHY_SFCORR_EXT, newVal);
+
+       cur_bin = -6000;
+       upper = bin + 100;
+       lower = bin - 100;
+
+       for (i = 0; i < 4; i++) {
+               int pilot_mask = 0;
+               int chan_mask = 0;
+               int bp = 0;
+               for (bp = 0; bp < 30; bp++) {
+                       if ((cur_bin > lower) && (cur_bin < upper)) {
+                               pilot_mask = pilot_mask | 0x1 << bp;
+                               chan_mask = chan_mask | 0x1 << bp;
+                       }
+                       cur_bin += 100;
+               }
+               cur_bin += inc[i];
+               REG_WRITE(ah, pilot_mask_reg[i], pilot_mask);
+               REG_WRITE(ah, chan_mask_reg[i], chan_mask);
+       }
+
+       cur_vit_mask = 6100;
+       upper = bin + 120;
+       lower = bin - 120;
+
+       for (i = 0; i < 123; i++) {
+               if ((cur_vit_mask > lower) && (cur_vit_mask < upper)) {
+
+                       /* workaround for gcc bug #37014 */
+                       volatile int tmp_v = abs(cur_vit_mask - bin);
+
+                       if (tmp_v < 75)
+                               mask_amt = 1;
+                       else
+                               mask_amt = 0;
+                       if (cur_vit_mask < 0)
+                               mask_m[abs(cur_vit_mask / 100)] = mask_amt;
+                       else
+                               mask_p[cur_vit_mask / 100] = mask_amt;
+               }
+               cur_vit_mask -= 100;
+       }
+
+       tmp_mask = (mask_m[46] << 30) | (mask_m[47] << 28)
+               | (mask_m[48] << 26) | (mask_m[49] << 24)
+               | (mask_m[50] << 22) | (mask_m[51] << 20)
+               | (mask_m[52] << 18) | (mask_m[53] << 16)
+               | (mask_m[54] << 14) | (mask_m[55] << 12)
+               | (mask_m[56] << 10) | (mask_m[57] << 8)
+               | (mask_m[58] << 6) | (mask_m[59] << 4)
+               | (mask_m[60] << 2) | (mask_m[61] << 0);
+       REG_WRITE(ah, AR_PHY_BIN_MASK_1, tmp_mask);
+       REG_WRITE(ah, AR_PHY_VIT_MASK2_M_46_61, tmp_mask);
+
+       tmp_mask = (mask_m[31] << 28)
+               | (mask_m[32] << 26) | (mask_m[33] << 24)
+               | (mask_m[34] << 22) | (mask_m[35] << 20)
+               | (mask_m[36] << 18) | (mask_m[37] << 16)
+               | (mask_m[48] << 14) | (mask_m[39] << 12)
+               | (mask_m[40] << 10) | (mask_m[41] << 8)
+               | (mask_m[42] << 6) | (mask_m[43] << 4)
+               | (mask_m[44] << 2) | (mask_m[45] << 0);
+       REG_WRITE(ah, AR_PHY_BIN_MASK_2, tmp_mask);
+       REG_WRITE(ah, AR_PHY_MASK2_M_31_45, tmp_mask);
+
+       tmp_mask = (mask_m[16] << 30) | (mask_m[16] << 28)
+               | (mask_m[18] << 26) | (mask_m[18] << 24)
+               | (mask_m[20] << 22) | (mask_m[20] << 20)
+               | (mask_m[22] << 18) | (mask_m[22] << 16)
+               | (mask_m[24] << 14) | (mask_m[24] << 12)
+               | (mask_m[25] << 10) | (mask_m[26] << 8)
+               | (mask_m[27] << 6) | (mask_m[28] << 4)
+               | (mask_m[29] << 2) | (mask_m[30] << 0);
+       REG_WRITE(ah, AR_PHY_BIN_MASK_3, tmp_mask);
+       REG_WRITE(ah, AR_PHY_MASK2_M_16_30, tmp_mask);
+
+       tmp_mask = (mask_m[0] << 30) | (mask_m[1] << 28)
+               | (mask_m[2] << 26) | (mask_m[3] << 24)
+               | (mask_m[4] << 22) | (mask_m[5] << 20)
+               | (mask_m[6] << 18) | (mask_m[7] << 16)
+               | (mask_m[8] << 14) | (mask_m[9] << 12)
+               | (mask_m[10] << 10) | (mask_m[11] << 8)
+               | (mask_m[12] << 6) | (mask_m[13] << 4)
+               | (mask_m[14] << 2) | (mask_m[15] << 0);
+       REG_WRITE(ah, AR_PHY_MASK_CTL, tmp_mask);
+       REG_WRITE(ah, AR_PHY_MASK2_M_00_15, tmp_mask);
+
+       tmp_mask = (mask_p[15] << 28)
+               | (mask_p[14] << 26) | (mask_p[13] << 24)
+               | (mask_p[12] << 22) | (mask_p[11] << 20)
+               | (mask_p[10] << 18) | (mask_p[9] << 16)
+               | (mask_p[8] << 14) | (mask_p[7] << 12)
+               | (mask_p[6] << 10) | (mask_p[5] << 8)
+               | (mask_p[4] << 6) | (mask_p[3] << 4)
+               | (mask_p[2] << 2) | (mask_p[1] << 0);
+       REG_WRITE(ah, AR_PHY_BIN_MASK2_1, tmp_mask);
+       REG_WRITE(ah, AR_PHY_MASK2_P_15_01, tmp_mask);
+
+       tmp_mask = (mask_p[30] << 28)
+               | (mask_p[29] << 26) | (mask_p[28] << 24)
+               | (mask_p[27] << 22) | (mask_p[26] << 20)
+               | (mask_p[25] << 18) | (mask_p[24] << 16)
+               | (mask_p[23] << 14) | (mask_p[22] << 12)
+               | (mask_p[21] << 10) | (mask_p[20] << 8)
+               | (mask_p[19] << 6) | (mask_p[18] << 4)
+               | (mask_p[17] << 2) | (mask_p[16] << 0);
+       REG_WRITE(ah, AR_PHY_BIN_MASK2_2, tmp_mask);
+       REG_WRITE(ah, AR_PHY_MASK2_P_30_16, tmp_mask);
+
+       tmp_mask = (mask_p[45] << 28)
+               | (mask_p[44] << 26) | (mask_p[43] << 24)
+               | (mask_p[42] << 22) | (mask_p[41] << 20)
+               | (mask_p[40] << 18) | (mask_p[39] << 16)
+               | (mask_p[38] << 14) | (mask_p[37] << 12)
+               | (mask_p[36] << 10) | (mask_p[35] << 8)
+               | (mask_p[34] << 6) | (mask_p[33] << 4)
+               | (mask_p[32] << 2) | (mask_p[31] << 0);
+       REG_WRITE(ah, AR_PHY_BIN_MASK2_3, tmp_mask);
+       REG_WRITE(ah, AR_PHY_MASK2_P_45_31, tmp_mask);
+
+       tmp_mask = (mask_p[61] << 30) | (mask_p[60] << 28)
+               | (mask_p[59] << 26) | (mask_p[58] << 24)
+               | (mask_p[57] << 22) | (mask_p[56] << 20)
+               | (mask_p[55] << 18) | (mask_p[54] << 16)
+               | (mask_p[53] << 14) | (mask_p[52] << 12)
+               | (mask_p[51] << 10) | (mask_p[50] << 8)
+               | (mask_p[49] << 6) | (mask_p[48] << 4)
+               | (mask_p[47] << 2) | (mask_p[46] << 0);
+       REG_WRITE(ah, AR_PHY_BIN_MASK2_4, tmp_mask);
+       REG_WRITE(ah, AR_PHY_MASK2_P_61_45, tmp_mask);
 }
 
-static void
-ath9k_phy_modify_rx_buffer(u32 *rfBuf, u32 reg32,
-                          u32 numBits, u32 firstBit,
-                          u32 column)
+/* All code below is for non single-chip solutions */
+
+/**
+ * ath9k_phy_modify_rx_buffer() - perform analog swizzling of parameters
+ * @rfbuf:
+ * @reg32:
+ * @numBits:
+ * @firstBit:
+ * @column:
+ *
+ * Performs analog "swizzling" of parameters into their location.
+ * Used on external AR2133/AR5133 radios.
+ */
+static void ath9k_phy_modify_rx_buffer(u32 *rfBuf, u32 reg32,
+                                      u32 numBits, u32 firstBit,
+                                      u32 column)
 {
        u32 tmp32, mask, arrayEntry, lastBit;
        int32_t bitPosition, bitsLeft;
@@ -197,26 +466,466 @@ ath9k_phy_modify_rx_buffer(u32 *rfBuf, u32 reg32,
        }
 }
 
-bool
-ath9k_hw_set_rf_regs(struct ath_hw *ah, struct ath9k_channel *chan,
-                    u16 modesIndex)
+/*
+ * Fix on 2.4 GHz band for orientation sensitivity issue by increasing
+ * rf_pwd_icsyndiv.
+ *
+ * Theoretical Rules:
+ *   if 2 GHz band
+ *      if forceBiasAuto
+ *         if synth_freq < 2412
+ *            bias = 0
+ *         else if 2412 <= synth_freq <= 2422
+ *            bias = 1
+ *         else // synth_freq > 2422
+ *            bias = 2
+ *      else if forceBias > 0
+ *         bias = forceBias & 7
+ *      else
+ *         no change, use value from ini file
+ *   else
+ *      no change, invalid band
+ *
+ *  1st Mod:
+ *    2422 also uses value of 2
+ *    <approved>
+ *
+ *  2nd Mod:
+ *    Less than 2412 uses value of 0, 2412 and above uses value of 2
+ */
+static void ath9k_hw_force_bias(struct ath_hw *ah, u16 synth_freq)
+{
+       struct ath_common *common = ath9k_hw_common(ah);
+       u32 tmp_reg;
+       int reg_writes = 0;
+       u32 new_bias = 0;
+
+       if (!AR_SREV_5416(ah) || synth_freq >= 3000) {
+               return;
+       }
+
+       BUG_ON(AR_SREV_9280_10_OR_LATER(ah));
+
+       if (synth_freq < 2412)
+               new_bias = 0;
+       else if (synth_freq < 2422)
+               new_bias = 1;
+       else
+               new_bias = 2;
+
+       /* pre-reverse this field */
+       tmp_reg = ath9k_hw_reverse_bits(new_bias, 3);
+
+       ath_print(common, ATH_DBG_CONFIG,
+                 "Force rf_pwd_icsyndiv to %1d on %4d\n",
+                 new_bias, synth_freq);
+
+       /* swizzle rf_pwd_icsyndiv */
+       ath9k_phy_modify_rx_buffer(ah->analogBank6Data, tmp_reg, 3, 181, 3);
+
+       /* write Bank 6 with new params */
+       REG_WRITE_RF_ARRAY(&ah->iniBank6, ah->analogBank6Data, reg_writes);
+}
+
+/**
+ * ath9k_hw_set_channel - tune to a channel on the external AR2133/AR5133 radios
+ * @ah: atheros hardware stucture
+ * @chan:
+ *
+ * For the external AR2133/AR5133 radios, takes the MHz channel value and set
+ * the channel value. Assumes writes enabled to analog bus and bank6 register
+ * cache in ah->analogBank6Data.
+ */
+int ath9k_hw_set_channel(struct ath_hw *ah, struct ath9k_channel *chan)
+{
+       struct ath_common *common = ath9k_hw_common(ah);
+       u32 channelSel = 0;
+       u32 bModeSynth = 0;
+       u32 aModeRefSel = 0;
+       u32 reg32 = 0;
+       u16 freq;
+       struct chan_centers centers;
+
+       ath9k_hw_get_channel_centers(ah, chan, &centers);
+       freq = centers.synth_center;
+
+       if (freq < 4800) {
+               u32 txctl;
+
+               if (((freq - 2192) % 5) == 0) {
+                       channelSel = ((freq - 672) * 2 - 3040) / 10;
+                       bModeSynth = 0;
+               } else if (((freq - 2224) % 5) == 0) {
+                       channelSel = ((freq - 704) * 2 - 3040) / 10;
+                       bModeSynth = 1;
+               } else {
+                       ath_print(common, ATH_DBG_FATAL,
+                                 "Invalid channel %u MHz\n", freq);
+                       return -EINVAL;
+               }
+
+               channelSel = (channelSel << 2) & 0xff;
+               channelSel = ath9k_hw_reverse_bits(channelSel, 8);
+
+               txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
+               if (freq == 2484) {
+
+                       REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
+                                 txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
+               } else {
+                       REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
+                                 txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
+               }
+
+       } else if ((freq % 20) == 0 && freq >= 5120) {
+               channelSel =
+                   ath9k_hw_reverse_bits(((freq - 4800) / 20 << 2), 8);
+               aModeRefSel = ath9k_hw_reverse_bits(1, 2);
+       } else if ((freq % 10) == 0) {
+               channelSel =
+                   ath9k_hw_reverse_bits(((freq - 4800) / 10 << 1), 8);
+               if (AR_SREV_9100(ah) || AR_SREV_9160_10_OR_LATER(ah))
+                       aModeRefSel = ath9k_hw_reverse_bits(2, 2);
+               else
+                       aModeRefSel = ath9k_hw_reverse_bits(1, 2);
+       } else if ((freq % 5) == 0) {
+               channelSel = ath9k_hw_reverse_bits((freq - 4800) / 5, 8);
+               aModeRefSel = ath9k_hw_reverse_bits(1, 2);
+       } else {
+               ath_print(common, ATH_DBG_FATAL,
+                         "Invalid channel %u MHz\n", freq);
+               return -EINVAL;
+       }
+
+       ath9k_hw_force_bias(ah, freq);
+
+       reg32 =
+           (channelSel << 8) | (aModeRefSel << 2) | (bModeSynth << 1) |
+           (1 << 5) | 0x1;
+
+       REG_WRITE(ah, AR_PHY(0x37), reg32);
+
+       ah->curchan = chan;
+       ah->curchan_rad_index = -1;
+
+       return 0;
+}
+
+/**
+ * ath9k_hw_spur_mitigate - convert baseband spur frequency for external radios
+ * @ah: atheros hardware structure
+ * @chan:
+ *
+ * For non single-chip solutions. Converts to baseband spur frequency given the
+ * input channel frequency and compute register settings below.
+ */
+void ath9k_hw_spur_mitigate(struct ath_hw *ah, struct ath9k_channel *chan)
+{
+       int bb_spur = AR_NO_SPUR;
+       int bin, cur_bin;
+       int spur_freq_sd;
+       int spur_delta_phase;
+       int denominator;
+       int upper, lower, cur_vit_mask;
+       int tmp, new;
+       int i;
+       int pilot_mask_reg[4] = { AR_PHY_TIMING7, AR_PHY_TIMING8,
+                         AR_PHY_PILOT_MASK_01_30, AR_PHY_PILOT_MASK_31_60
+       };
+       int chan_mask_reg[4] = { AR_PHY_TIMING9, AR_PHY_TIMING10,
+                        AR_PHY_CHANNEL_MASK_01_30, AR_PHY_CHANNEL_MASK_31_60
+       };
+       int inc[4] = { 0, 100, 0, 0 };
+
+       int8_t mask_m[123];
+       int8_t mask_p[123];
+       int8_t mask_amt;
+       int tmp_mask;
+       int cur_bb_spur;
+       bool is2GHz = IS_CHAN_2GHZ(chan);
+
+       memset(&mask_m, 0, sizeof(int8_t) * 123);
+       memset(&mask_p, 0, sizeof(int8_t) * 123);
+
+       for (i = 0; i < AR_EEPROM_MODAL_SPURS; i++) {
+               cur_bb_spur = ah->eep_ops->get_spur_channel(ah, i, is2GHz);
+               if (AR_NO_SPUR == cur_bb_spur)
+                       break;
+               cur_bb_spur = cur_bb_spur - (chan->channel * 10);
+               if ((cur_bb_spur > -95) && (cur_bb_spur < 95)) {
+                       bb_spur = cur_bb_spur;
+                       break;
+               }
+       }
+
+       if (AR_NO_SPUR == bb_spur)
+               return;
+
+       bin = bb_spur * 32;
+
+       tmp = REG_READ(ah, AR_PHY_TIMING_CTRL4(0));
+       new = tmp | (AR_PHY_TIMING_CTRL4_ENABLE_SPUR_RSSI |
+                    AR_PHY_TIMING_CTRL4_ENABLE_SPUR_FILTER |
+                    AR_PHY_TIMING_CTRL4_ENABLE_CHAN_MASK |
+                    AR_PHY_TIMING_CTRL4_ENABLE_PILOT_MASK);
+
+       REG_WRITE(ah, AR_PHY_TIMING_CTRL4(0), new);
+
+       new = (AR_PHY_SPUR_REG_MASK_RATE_CNTL |
+              AR_PHY_SPUR_REG_ENABLE_MASK_PPM |
+              AR_PHY_SPUR_REG_MASK_RATE_SELECT |
+              AR_PHY_SPUR_REG_ENABLE_VIT_SPUR_RSSI |
+              SM(SPUR_RSSI_THRESH, AR_PHY_SPUR_REG_SPUR_RSSI_THRESH));
+       REG_WRITE(ah, AR_PHY_SPUR_REG, new);
+
+       spur_delta_phase = ((bb_spur * 524288) / 100) &
+               AR_PHY_TIMING11_SPUR_DELTA_PHASE;
+
+       denominator = IS_CHAN_2GHZ(chan) ? 440 : 400;
+       spur_freq_sd = ((bb_spur * 2048) / denominator) & 0x3ff;
+
+       new = (AR_PHY_TIMING11_USE_SPUR_IN_AGC |
+              SM(spur_freq_sd, AR_PHY_TIMING11_SPUR_FREQ_SD) |
+              SM(spur_delta_phase, AR_PHY_TIMING11_SPUR_DELTA_PHASE));
+       REG_WRITE(ah, AR_PHY_TIMING11, new);
+
+       cur_bin = -6000;
+       upper = bin + 100;
+       lower = bin - 100;
+
+       for (i = 0; i < 4; i++) {
+               int pilot_mask = 0;
+               int chan_mask = 0;
+               int bp = 0;
+               for (bp = 0; bp < 30; bp++) {
+                       if ((cur_bin > lower) && (cur_bin < upper)) {
+                               pilot_mask = pilot_mask | 0x1 << bp;
+                               chan_mask = chan_mask | 0x1 << bp;
+                       }
+                       cur_bin += 100;
+               }
+               cur_bin += inc[i];
+               REG_WRITE(ah, pilot_mask_reg[i], pilot_mask);
+               REG_WRITE(ah, chan_mask_reg[i], chan_mask);
+       }
+
+       cur_vit_mask = 6100;
+       upper = bin + 120;
+       lower = bin - 120;
+
+       for (i = 0; i < 123; i++) {
+               if ((cur_vit_mask > lower) && (cur_vit_mask < upper)) {
+
+                       /* workaround for gcc bug #37014 */
+                       volatile int tmp_v = abs(cur_vit_mask - bin);
+
+                       if (tmp_v < 75)
+                               mask_amt = 1;
+                       else
+                               mask_amt = 0;
+                       if (cur_vit_mask < 0)
+                               mask_m[abs(cur_vit_mask / 100)] = mask_amt;
+                       else
+                               mask_p[cur_vit_mask / 100] = mask_amt;
+               }
+               cur_vit_mask -= 100;
+       }
+
+       tmp_mask = (mask_m[46] << 30) | (mask_m[47] << 28)
+               | (mask_m[48] << 26) | (mask_m[49] << 24)
+               | (mask_m[50] << 22) | (mask_m[51] << 20)
+               | (mask_m[52] << 18) | (mask_m[53] << 16)
+               | (mask_m[54] << 14) | (mask_m[55] << 12)
+               | (mask_m[56] << 10) | (mask_m[57] << 8)
+               | (mask_m[58] << 6) | (mask_m[59] << 4)
+               | (mask_m[60] << 2) | (mask_m[61] << 0);
+       REG_WRITE(ah, AR_PHY_BIN_MASK_1, tmp_mask);
+       REG_WRITE(ah, AR_PHY_VIT_MASK2_M_46_61, tmp_mask);
+
+       tmp_mask = (mask_m[31] << 28)
+               | (mask_m[32] << 26) | (mask_m[33] << 24)
+               | (mask_m[34] << 22) | (mask_m[35] << 20)
+               | (mask_m[36] << 18) | (mask_m[37] << 16)
+               | (mask_m[48] << 14) | (mask_m[39] << 12)
+               | (mask_m[40] << 10) | (mask_m[41] << 8)
+               | (mask_m[42] << 6) | (mask_m[43] << 4)
+               | (mask_m[44] << 2) | (mask_m[45] << 0);
+       REG_WRITE(ah, AR_PHY_BIN_MASK_2, tmp_mask);
+       REG_WRITE(ah, AR_PHY_MASK2_M_31_45, tmp_mask);
+
+       tmp_mask = (mask_m[16] << 30) | (mask_m[16] << 28)
+               | (mask_m[18] << 26) | (mask_m[18] << 24)
+               | (mask_m[20] << 22) | (mask_m[20] << 20)
+               | (mask_m[22] << 18) | (mask_m[22] << 16)
+               | (mask_m[24] << 14) | (mask_m[24] << 12)
+               | (mask_m[25] << 10) | (mask_m[26] << 8)
+               | (mask_m[27] << 6) | (mask_m[28] << 4)
+               | (mask_m[29] << 2) | (mask_m[30] << 0);
+       REG_WRITE(ah, AR_PHY_BIN_MASK_3, tmp_mask);
+       REG_WRITE(ah, AR_PHY_MASK2_M_16_30, tmp_mask);
+
+       tmp_mask = (mask_m[0] << 30) | (mask_m[1] << 28)
+               | (mask_m[2] << 26) | (mask_m[3] << 24)
+               | (mask_m[4] << 22) | (mask_m[5] << 20)
+               | (mask_m[6] << 18) | (mask_m[7] << 16)
+               | (mask_m[8] << 14) | (mask_m[9] << 12)
+               | (mask_m[10] << 10) | (mask_m[11] << 8)
+               | (mask_m[12] << 6) | (mask_m[13] << 4)
+               | (mask_m[14] << 2) | (mask_m[15] << 0);
+       REG_WRITE(ah, AR_PHY_MASK_CTL, tmp_mask);
+       REG_WRITE(ah, AR_PHY_MASK2_M_00_15, tmp_mask);
+
+       tmp_mask = (mask_p[15] << 28)
+               | (mask_p[14] << 26) | (mask_p[13] << 24)
+               | (mask_p[12] << 22) | (mask_p[11] << 20)
+               | (mask_p[10] << 18) | (mask_p[9] << 16)
+               | (mask_p[8] << 14) | (mask_p[7] << 12)
+               | (mask_p[6] << 10) | (mask_p[5] << 8)
+               | (mask_p[4] << 6) | (mask_p[3] << 4)
+               | (mask_p[2] << 2) | (mask_p[1] << 0);
+       REG_WRITE(ah, AR_PHY_BIN_MASK2_1, tmp_mask);
+       REG_WRITE(ah, AR_PHY_MASK2_P_15_01, tmp_mask);
+
+       tmp_mask = (mask_p[30] << 28)
+               | (mask_p[29] << 26) | (mask_p[28] << 24)
+               | (mask_p[27] << 22) | (mask_p[26] << 20)
+               | (mask_p[25] << 18) | (mask_p[24] << 16)
+               | (mask_p[23] << 14) | (mask_p[22] << 12)
+               | (mask_p[21] << 10) | (mask_p[20] << 8)
+               | (mask_p[19] << 6) | (mask_p[18] << 4)
+               | (mask_p[17] << 2) | (mask_p[16] << 0);
+       REG_WRITE(ah, AR_PHY_BIN_MASK2_2, tmp_mask);
+       REG_WRITE(ah, AR_PHY_MASK2_P_30_16, tmp_mask);
+
+       tmp_mask = (mask_p[45] << 28)
+               | (mask_p[44] << 26) | (mask_p[43] << 24)
+               | (mask_p[42] << 22) | (mask_p[41] << 20)
+               | (mask_p[40] << 18) | (mask_p[39] << 16)
+               | (mask_p[38] << 14) | (mask_p[37] << 12)
+               | (mask_p[36] << 10) | (mask_p[35] << 8)
+               | (mask_p[34] << 6) | (mask_p[33] << 4)
+               | (mask_p[32] << 2) | (mask_p[31] << 0);
+       REG_WRITE(ah, AR_PHY_BIN_MASK2_3, tmp_mask);
+       REG_WRITE(ah, AR_PHY_MASK2_P_45_31, tmp_mask);
+
+       tmp_mask = (mask_p[61] << 30) | (mask_p[60] << 28)
+               | (mask_p[59] << 26) | (mask_p[58] << 24)
+               | (mask_p[57] << 22) | (mask_p[56] << 20)
+               | (mask_p[55] << 18) | (mask_p[54] << 16)
+               | (mask_p[53] << 14) | (mask_p[52] << 12)
+               | (mask_p[51] << 10) | (mask_p[50] << 8)
+               | (mask_p[49] << 6) | (mask_p[48] << 4)
+               | (mask_p[47] << 2) | (mask_p[46] << 0);
+       REG_WRITE(ah, AR_PHY_BIN_MASK2_4, tmp_mask);
+       REG_WRITE(ah, AR_PHY_MASK2_P_61_45, tmp_mask);
+}
+
+/**
+ * ath9k_hw_rf_alloc_ext_banks - allocates banks for external radio programming
+ * @ah: atheros hardware structure
+ *
+ * Only required for older devices with external AR2133/AR5133 radios.
+ */
+int ath9k_hw_rf_alloc_ext_banks(struct ath_hw *ah)
+{
+#define ATH_ALLOC_BANK(bank, size) do { \
+               bank = kzalloc((sizeof(u32) * size), GFP_KERNEL); \
+               if (!bank) { \
+                       ath_print(common, ATH_DBG_FATAL, \
+                                 "Cannot allocate RF banks\n"); \
+                       return -ENOMEM; \
+               } \
+       } while (0);
+
+       struct ath_common *common = ath9k_hw_common(ah);
+
+       BUG_ON(AR_SREV_9280_10_OR_LATER(ah));
+
+       ATH_ALLOC_BANK(ah->analogBank0Data, ah->iniBank0.ia_rows);
+       ATH_ALLOC_BANK(ah->analogBank1Data, ah->iniBank1.ia_rows);
+       ATH_ALLOC_BANK(ah->analogBank2Data, ah->iniBank2.ia_rows);
+       ATH_ALLOC_BANK(ah->analogBank3Data, ah->iniBank3.ia_rows);
+       ATH_ALLOC_BANK(ah->analogBank6Data, ah->iniBank6.ia_rows);
+       ATH_ALLOC_BANK(ah->analogBank6TPCData, ah->iniBank6TPC.ia_rows);
+       ATH_ALLOC_BANK(ah->analogBank7Data, ah->iniBank7.ia_rows);
+       ATH_ALLOC_BANK(ah->addac5416_21,
+                      ah->iniAddac.ia_rows * ah->iniAddac.ia_columns);
+       ATH_ALLOC_BANK(ah->bank6Temp, ah->iniBank6.ia_rows);
+
+       return 0;
+#undef ATH_ALLOC_BANK
+}
+
+
+/**
+ * ath9k_hw_rf_free_ext_banks - Free memory for analog bank scratch buffers
+ * @ah: atheros hardware struture
+ * For the external AR2133/AR5133 radios banks.
+ */
+void
+ath9k_hw_rf_free_ext_banks(struct ath_hw *ah)
+{
+#define ATH_FREE_BANK(bank) do { \
+               kfree(bank); \
+               bank = NULL; \
+       } while (0);
+
+       BUG_ON(AR_SREV_9280_10_OR_LATER(ah));
+
+       ATH_FREE_BANK(ah->analogBank0Data);
+       ATH_FREE_BANK(ah->analogBank1Data);
+       ATH_FREE_BANK(ah->analogBank2Data);
+       ATH_FREE_BANK(ah->analogBank3Data);
+       ATH_FREE_BANK(ah->analogBank6Data);
+       ATH_FREE_BANK(ah->analogBank6TPCData);
+       ATH_FREE_BANK(ah->analogBank7Data);
+       ATH_FREE_BANK(ah->addac5416_21);
+       ATH_FREE_BANK(ah->bank6Temp);
+
+#undef ATH_FREE_BANK
+}
+
+/* *
+ * ath9k_hw_set_rf_regs - programs rf registers based on EEPROM
+ * @ah: atheros hardware structure
+ * @chan:
+ * @modesIndex:
+ *
+ * Used for the external AR2133/AR5133 radios.
+ *
+ * Reads the EEPROM header info from the device structure and programs
+ * all rf registers. This routine requires access to the analog
+ * rf device. This is not required for single-chip devices.
+ */
+bool ath9k_hw_set_rf_regs(struct ath_hw *ah, struct ath9k_channel *chan,
+                         u16 modesIndex)
 {
        u32 eepMinorRev;
        u32 ob5GHz = 0, db5GHz = 0;
        u32 ob2GHz = 0, db2GHz = 0;
        int regWrites = 0;
 
+       /*
+        * Software does not need to program bank data
+        * for single chip devices, that is AR9280 or anything
+        * after that.
+        */
        if (AR_SREV_9280_10_OR_LATER(ah))
                return true;
 
+       /* Setup rf parameters */
        eepMinorRev = ah->eep_ops->get_eeprom(ah, EEP_MINOR_REV);
 
+       /* Setup Bank 0 Write */
        RF_BANK_SETUP(ah->analogBank0Data, &ah->iniBank0, 1);
 
+       /* Setup Bank 1 Write */
        RF_BANK_SETUP(ah->analogBank1Data, &ah->iniBank1, 1);
 
+       /* Setup Bank 2 Write */
        RF_BANK_SETUP(ah->analogBank2Data, &ah->iniBank2, 1);
 
+       /* Setup Bank 6 Write */
        RF_BANK_SETUP(ah->analogBank3Data, &ah->iniBank3,
                      modesIndex);
        {
@@ -227,6 +936,7 @@ ath9k_hw_set_rf_regs(struct ath_hw *ah, struct ath9k_channel *chan,
                }
        }
 
+       /* Only the 5 or 2 GHz OB/DB need to be set for a mode */
        if (eepMinorRev >= 2) {
                if (IS_CHAN_2GHZ(chan)) {
                        ob2GHz = ah->eep_ops->get_eeprom(ah, EEP_OB_2);
@@ -245,8 +955,10 @@ ath9k_hw_set_rf_regs(struct ath_hw *ah, struct ath9k_channel *chan,
                }
        }
 
+       /* Setup Bank 7 Setup */
        RF_BANK_SETUP(ah->analogBank7Data, &ah->iniBank7, 1);
 
+       /* Write Analog registers */
        REG_WRITE_RF_ARRAY(&ah->iniBank0, ah->analogBank0Data,
                           regWrites);
        REG_WRITE_RF_ARRAY(&ah->iniBank1, ah->analogBank1Data,
@@ -262,137 +974,3 @@ ath9k_hw_set_rf_regs(struct ath_hw *ah, struct ath9k_channel *chan,
 
        return true;
 }
-
-void
-ath9k_hw_rf_free(struct ath_hw *ah)
-{
-#define ATH_FREE_BANK(bank) do { \
-               kfree(bank); \
-               bank = NULL; \
-       } while (0);
-
-       ATH_FREE_BANK(ah->analogBank0Data);
-       ATH_FREE_BANK(ah->analogBank1Data);
-       ATH_FREE_BANK(ah->analogBank2Data);
-       ATH_FREE_BANK(ah->analogBank3Data);
-       ATH_FREE_BANK(ah->analogBank6Data);
-       ATH_FREE_BANK(ah->analogBank6TPCData);
-       ATH_FREE_BANK(ah->analogBank7Data);
-       ATH_FREE_BANK(ah->addac5416_21);
-       ATH_FREE_BANK(ah->bank6Temp);
-#undef ATH_FREE_BANK
-}
-
-bool ath9k_hw_init_rf(struct ath_hw *ah, int *status)
-{
-       if (!AR_SREV_9280_10_OR_LATER(ah)) {
-               ah->analogBank0Data =
-                   kzalloc((sizeof(u32) *
-                            ah->iniBank0.ia_rows), GFP_KERNEL);
-               ah->analogBank1Data =
-                   kzalloc((sizeof(u32) *
-                            ah->iniBank1.ia_rows), GFP_KERNEL);
-               ah->analogBank2Data =
-                   kzalloc((sizeof(u32) *
-                            ah->iniBank2.ia_rows), GFP_KERNEL);
-               ah->analogBank3Data =
-                   kzalloc((sizeof(u32) *
-                            ah->iniBank3.ia_rows), GFP_KERNEL);
-               ah->analogBank6Data =
-                   kzalloc((sizeof(u32) *
-                            ah->iniBank6.ia_rows), GFP_KERNEL);
-               ah->analogBank6TPCData =
-                   kzalloc((sizeof(u32) *
-                            ah->iniBank6TPC.ia_rows), GFP_KERNEL);
-               ah->analogBank7Data =
-                   kzalloc((sizeof(u32) *
-                            ah->iniBank7.ia_rows), GFP_KERNEL);
-
-               if (ah->analogBank0Data == NULL
-                   || ah->analogBank1Data == NULL
-                   || ah->analogBank2Data == NULL
-                   || ah->analogBank3Data == NULL
-                   || ah->analogBank6Data == NULL
-                   || ah->analogBank6TPCData == NULL
-                   || ah->analogBank7Data == NULL) {
-                       DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
-                               "Cannot allocate RF banks\n");
-                       *status = -ENOMEM;
-                       return false;
-               }
-
-               ah->addac5416_21 =
-                   kzalloc((sizeof(u32) *
-                            ah->iniAddac.ia_rows *
-                            ah->iniAddac.ia_columns), GFP_KERNEL);
-               if (ah->addac5416_21 == NULL) {
-                       DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
-                               "Cannot allocate addac5416_21\n");
-                       *status = -ENOMEM;
-                       return false;
-               }
-
-               ah->bank6Temp =
-                   kzalloc((sizeof(u32) *
-                            ah->iniBank6.ia_rows), GFP_KERNEL);
-               if (ah->bank6Temp == NULL) {
-                       DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
-                               "Cannot allocate bank6Temp\n");
-                       *status = -ENOMEM;
-                       return false;
-               }
-       }
-
-       return true;
-}
-
-void
-ath9k_hw_decrease_chain_power(struct ath_hw *ah, struct ath9k_channel *chan)
-{
-       int i, regWrites = 0;
-       u32 bank6SelMask;
-       u32 *bank6Temp = ah->bank6Temp;
-
-       switch (ah->config.diversity_control) {
-       case ATH9K_ANT_FIXED_A:
-               bank6SelMask =
-                   (ah->config.antenna_switch_swap & ANTSWAP_AB) ?
-                       REDUCE_CHAIN_0 : REDUCE_CHAIN_1;
-               break;
-       case ATH9K_ANT_FIXED_B:
-               bank6SelMask =
-                   (ah->config.antenna_switch_swap & ANTSWAP_AB) ?
-                       REDUCE_CHAIN_1 : REDUCE_CHAIN_0;
-               break;
-       case ATH9K_ANT_VARIABLE:
-               return;
-               break;
-       default:
-               return;
-               break;
-       }
-
-       for (i = 0; i < ah->iniBank6.ia_rows; i++)
-               bank6Temp[i] = ah->analogBank6Data[i];
-
-       REG_WRITE(ah, AR_PHY_BASE + 0xD8, bank6SelMask);
-
-       ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 189, 0);
-       ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 190, 0);
-       ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 191, 0);
-       ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 192, 0);
-       ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 193, 0);
-       ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 222, 0);
-       ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 245, 0);
-       ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 246, 0);
-       ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 247, 0);
-
-       REG_WRITE_RF_ARRAY(&ah->iniBank6, bank6Temp, regWrites);
-
-       REG_WRITE(ah, AR_PHY_BASE + 0xD8, 0x00000053);
-#ifdef ALTER_SWITCH
-       REG_WRITE(ah, PHY_SWITCH_CHAIN_0,
-                 (REG_READ(ah, PHY_SWITCH_CHAIN_0) & ~0x38)
-                 | ((REG_READ(ah, PHY_SWITCH_CHAIN_0) >> 3) & 0x38));
-#endif
-}