ath9k_hw: Improve fast channel change for AR9003 chips
In order to reduce the overall scan time, fast channel change
should be implemented properly. This patch adds fast channel
change support across band switch or channel mode switch
instead of doing full chip reset. During the fastcc, tx iqcal
measurements are preserved and will be reloaded after successful
the channel change.
This patch also addressed fast channel issue where the STA can not
see APs in higher than operating channel on 5GHz band after
the association.
Cc: Paul Stewart <pstew@google.com>
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 684c33c..e5c458d 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -337,6 +337,8 @@
CHANNEL_HT40PLUS | \
CHANNEL_HT40MINUS)
+#define MAX_IQCAL_MEASUREMENT 8
+
struct ath9k_hw_cal_data {
u16 channel;
u32 channelFlags;
@@ -346,8 +348,11 @@
bool paprd_done;
bool nfcal_pending;
bool nfcal_interference;
+ bool done_txiqcal_once;
u16 small_signal_gain[AR9300_MAX_CHAINS];
u32 pa_table[AR9300_MAX_CHAINS][PAPRD_TABLE_SZ];
+ u32 num_measures[AR9300_MAX_CHAINS];
+ int tx_corr_coeff[MAX_IQCAL_MEASUREMENT][AR9300_MAX_CHAINS];
struct ath9k_nfcal_hist nfCalHist[NUM_NF_READINGS];
};
@@ -583,6 +588,8 @@
void (*do_getnf)(struct ath_hw *ah, int16_t nfarray[NUM_NF_READINGS]);
void (*set_radar_params)(struct ath_hw *ah,
struct ath_hw_radar_conf *conf);
+ int (*fast_chan_change)(struct ath_hw *ah, struct ath9k_channel *chan,
+ u8 *ini_reloaded);
/* ANI */
void (*ani_cache_ini_regs)(struct ath_hw *ah);
@@ -684,6 +691,7 @@
atomic_t intr_ref_cnt;
bool chip_fullsleep;
u32 atim_window;
+ u32 modes_index;
/* Calibration */
u32 supp_cals;