ath9k_hw: clean up the noise floor calibration code to reduce code duplication

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/ar5008_phy.c b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
index c675182..48c5a5f 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
@@ -1495,50 +1495,25 @@ static bool ar5008_hw_ani_control_new(struct ath_hw *ah,
 static void ar5008_hw_do_getnf(struct ath_hw *ah,
                              int16_t nfarray[NUM_NF_READINGS])
 {
-       struct ath_common *common = ath9k_hw_common(ah);
        int16_t nf;
 
        nf = MS(REG_READ(ah, AR_PHY_CCA), AR_PHY_MINCCA_PWR);
-       if (nf & 0x100)
-               nf = 0 - ((nf ^ 0x1ff) + 1);
-       ath_print(common, ATH_DBG_CALIBRATE,
-                 "NF calibrated [ctl] [chain 0] is %d\n", nf);
-       nfarray[0] = nf;
+       nfarray[0] = sign_extend(nf, 9);
 
        nf = MS(REG_READ(ah, AR_PHY_CH1_CCA), AR_PHY_CH1_MINCCA_PWR);
-       if (nf & 0x100)
-               nf = 0 - ((nf ^ 0x1ff) + 1);
-       ath_print(common, ATH_DBG_CALIBRATE,
-                 "NF calibrated [ctl] [chain 1] is %d\n", nf);
-       nfarray[1] = nf;
+       nfarray[1] = sign_extend(nf, 9);
 
        nf = MS(REG_READ(ah, AR_PHY_CH2_CCA), AR_PHY_CH2_MINCCA_PWR);
-       if (nf & 0x100)
-               nf = 0 - ((nf ^ 0x1ff) + 1);
-       ath_print(common, ATH_DBG_CALIBRATE,
-                 "NF calibrated [ctl] [chain 2] is %d\n", nf);
-       nfarray[2] = nf;
+       nfarray[2] = sign_extend(nf, 9);
 
        nf = MS(REG_READ(ah, AR_PHY_EXT_CCA), AR_PHY_EXT_MINCCA_PWR);
-       if (nf & 0x100)
-               nf = 0 - ((nf ^ 0x1ff) + 1);
-       ath_print(common, ATH_DBG_CALIBRATE,
-                 "NF calibrated [ext] [chain 0] is %d\n", nf);
-       nfarray[3] = nf;
+       nfarray[3] = sign_extend(nf, 9);
 
        nf = MS(REG_READ(ah, AR_PHY_CH1_EXT_CCA), AR_PHY_CH1_EXT_MINCCA_PWR);
-       if (nf & 0x100)
-               nf = 0 - ((nf ^ 0x1ff) + 1);
-       ath_print(common, ATH_DBG_CALIBRATE,
-                 "NF calibrated [ext] [chain 1] is %d\n", nf);
-       nfarray[4] = nf;
+       nfarray[4] = sign_extend(nf, 9);
 
        nf = MS(REG_READ(ah, AR_PHY_CH2_EXT_CCA), AR_PHY_CH2_EXT_MINCCA_PWR);
-       if (nf & 0x100)
-               nf = 0 - ((nf ^ 0x1ff) + 1);
-       ath_print(common, ATH_DBG_CALIBRATE,
-                 "NF calibrated [ext] [chain 2] is %d\n", nf);
-       nfarray[5] = nf;
+       nfarray[5] = sign_extend(nf, 9);
 }
 
 static void ar5008_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)

diff --git a/drivers/net/wireless/ath/ath9k/ar9002_phy.c b/drivers/net/wireless/ath/ath9k/ar9002_phy.c
index 240e8a4..4922b8d 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/ar9002_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar9002_phy.c
@@ -471,47 +471,22 @@ static u32 ar9002_hw_compute_pll_control(struct ath_hw *ah,
 static void ar9002_hw_do_getnf(struct ath_hw *ah,
                              int16_t nfarray[NUM_NF_READINGS])
 {
-       struct ath_common *common = ath9k_hw_common(ah);
        int16_t nf;
 
        nf = MS(REG_READ(ah, AR_PHY_CCA), AR9280_PHY_MINCCA_PWR);
+       nfarray[0] = sign_extend(nf, 9);
 
-       if (nf & 0x100)
-               nf = 0 - ((nf ^ 0x1ff) + 1);
-       ath_print(common, ATH_DBG_CALIBRATE,
-                 "NF calibrated [ctl] [chain 0] is %d\n", nf);
-
-       nfarray[0] = nf;
+       nf = MS(REG_READ(ah, AR_PHY_EXT_CCA), AR9280_PHY_EXT_MINCCA_PWR);
+       nfarray[3] = sign_extend(nf, 9);
 
-       if (!AR_SREV_9285(ah) && !AR_SREV_9271(ah)) {
-               nf = MS(REG_READ(ah, AR_PHY_CH1_CCA),
-                               AR9280_PHY_CH1_MINCCA_PWR);
+       if (AR_SREV_9285(ah) || AR_SREV_9271(ah))
+               return;
 
-               if (nf & 0x100)
-                       nf = 0 - ((nf ^ 0x1ff) + 1);
-               ath_print(common, ATH_DBG_CALIBRATE,
-                         "NF calibrated [ctl] [chain 1] is %d\n", nf);
-               nfarray[1] = nf;
-       }
+       nf = MS(REG_READ(ah, AR_PHY_CH1_CCA), AR9280_PHY_CH1_MINCCA_PWR);
+       nfarray[1] = sign_extend(nf, 9);
 
-       nf = MS(REG_READ(ah, AR_PHY_EXT_CCA), AR9280_PHY_EXT_MINCCA_PWR);
-       if (nf & 0x100)
-               nf = 0 - ((nf ^ 0x1ff) + 1);
-       ath_print(common, ATH_DBG_CALIBRATE,
-                 "NF calibrated [ext] [chain 0] is %d\n", nf);
-
-       nfarray[3] = nf;
-
-       if (!AR_SREV_9285(ah) && !AR_SREV_9271(ah)) {
-               nf = MS(REG_READ(ah, AR_PHY_CH1_EXT_CCA),
-                               AR9280_PHY_CH1_EXT_MINCCA_PWR);
-
-               if (nf & 0x100)
-                       nf = 0 - ((nf ^ 0x1ff) + 1);
-               ath_print(common, ATH_DBG_CALIBRATE,
-                         "NF calibrated [ext] [chain 1] is %d\n", nf);
-               nfarray[4] = nf;
-       }
+       nf = MS(REG_READ(ah, AR_PHY_CH1_EXT_CCA), AR9280_PHY_CH1_EXT_MINCCA_PWR);
+       nfarray[4] = sign_extend(nf, 9);
 }
 
 static void ar9002_hw_set_nf_limits(struct ath_hw *ah)

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_phy.c b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
index a0bc1b7..868b24a 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
@@ -1018,50 +1018,25 @@ static bool ar9003_hw_ani_control(struct ath_hw *ah,
 static void ar9003_hw_do_getnf(struct ath_hw *ah,
                              int16_t nfarray[NUM_NF_READINGS])
 {
-       struct ath_common *common = ath9k_hw_common(ah);
        int16_t nf;
 
        nf = MS(REG_READ(ah, AR_PHY_CCA_0), AR_PHY_MINCCA_PWR);
-       if (nf & 0x100)
-               nf = 0 - ((nf ^ 0x1ff) + 1);
-       ath_print(common, ATH_DBG_CALIBRATE,
-                 "NF calibrated [ctl] [chain 0] is %d\n", nf);
-       nfarray[0] = nf;
+       nfarray[0] = sign_extend(nf, 9);
 
        nf = MS(REG_READ(ah, AR_PHY_CCA_1), AR_PHY_CH1_MINCCA_PWR);
-       if (nf & 0x100)
-               nf = 0 - ((nf ^ 0x1ff) + 1);
-       ath_print(common, ATH_DBG_CALIBRATE,
-                 "NF calibrated [ctl] [chain 1] is %d\n", nf);
-       nfarray[1] = nf;
+       nfarray[1] = sign_extend(nf, 9);
 
        nf = MS(REG_READ(ah, AR_PHY_CCA_2), AR_PHY_CH2_MINCCA_PWR);
-       if (nf & 0x100)
-               nf = 0 - ((nf ^ 0x1ff) + 1);
-       ath_print(common, ATH_DBG_CALIBRATE,
-                 "NF calibrated [ctl] [chain 2] is %d\n", nf);
-       nfarray[2] = nf;
+       nfarray[2] = sign_extend(nf, 9);
 
        nf = MS(REG_READ(ah, AR_PHY_EXT_CCA), AR_PHY_EXT_MINCCA_PWR);
-       if (nf & 0x100)
-               nf = 0 - ((nf ^ 0x1ff) + 1);
-       ath_print(common, ATH_DBG_CALIBRATE,
-                 "NF calibrated [ext] [chain 0] is %d\n", nf);
-       nfarray[3] = nf;
+       nfarray[3] = sign_extend(nf, 9);
 
        nf = MS(REG_READ(ah, AR_PHY_EXT_CCA_1), AR_PHY_CH1_EXT_MINCCA_PWR);
-       if (nf & 0x100)
-               nf = 0 - ((nf ^ 0x1ff) + 1);
-       ath_print(common, ATH_DBG_CALIBRATE,
-                 "NF calibrated [ext] [chain 1] is %d\n", nf);
-       nfarray[4] = nf;
+       nfarray[4] = sign_extend(nf, 9);
 
        nf = MS(REG_READ(ah, AR_PHY_EXT_CCA_2), AR_PHY_CH2_EXT_MINCCA_PWR);
-       if (nf & 0x100)
-               nf = 0 - ((nf ^ 0x1ff) + 1);
-       ath_print(common, ATH_DBG_CALIBRATE,
-                 "NF calibrated [ext] [chain 2] is %d\n", nf);
-       nfarray[5] = nf;
+       nfarray[5] = sign_extend(nf, 9);
 }
 
 static void ar9003_hw_set_nf_limits(struct ath_hw *ah)

diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c
index 7f49b75..cc29ef7 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/calib.c
+++ b/drivers/net/wireless/ath/ath9k/calib.c
@@ -182,6 +182,10 @@ static void ath9k_hw_nf_sanitize(struct ath_hw *ah, s16 *nf)
                if (!nf[i])
                        continue;
 
+               ath_print(common, ATH_DBG_CALIBRATE,
+                         "NF calibrated [%s] [chain %d] is %d\n",
+                         (i > 3 ? "ext" : "ctl"), i % 3, nf[i]);
+
                if (nf[i] > limit->max) {
                        ath_print(common, ATH_DBG_CALIBRATE,
                                  "NF[%d] (%d) > MAX (%d), correcting to MAX",

diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 6a4b692..92e2502 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -853,6 +853,12 @@ static inline struct ath_hw_ops *ath9k_hw_ops(struct ath_hw *ah)
        return &ah->ops;
 }
 
+static inline int sign_extend(int val, const int nbits)
+{
+       int order = BIT(nbits-1);
+       return (val ^ order) - order;
+}
+
 /* Initialization, Detach, Reset */
 const char *ath9k_hw_probe(u16 vendorid, u16 devid);
 void ath9k_hw_deinit(struct ath_hw *ah);