ath9k_hw: Add radio retention support for AR9480
Supported calibrations of radio retention table (RTT) are
- DC offset
- Filter
- Peak detect
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/ar9003_calib.c b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
index 3506e7b..47f140c 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
@@ -17,6 +17,7 @@
#include "hw.h"
#include "hw-ops.h"
#include "ar9003_phy.h"
+#include "ar9003_rtt.h"
#define MAX_MEASUREMENT MAX_IQCAL_MEASUREMENT
#define MAX_MAG_DELTA 11
@@ -900,25 +901,81 @@
AR_PHY_RX_IQCAL_CORR_B0_LOOPBACK_IQCORR_EN, 0x1);
}
+static bool ar9003_hw_rtt_restore(struct ath_hw *ah, struct ath9k_channel *chan)
+{
+ struct ath9k_rtt_hist *hist;
+ u32 *table;
+ int i;
+ bool restore;
+
+ if (!(ah->caps.hw_caps & ATH9K_HW_CAP_RTT) || !ah->caldata)
+ return false;
+
+ hist = &ah->caldata->rtt_hist;
+ ar9003_hw_rtt_enable(ah);
+ ar9003_hw_rtt_set_mask(ah, 0x10);
+ for (i = 0; i < AR9300_MAX_CHAINS; i++) {
+ if (!(ah->rxchainmask & (1 << i)))
+ continue;
+ table = &hist->table[i][hist->num_readings][0];
+ ar9003_hw_rtt_load_hist(ah, i, table);
+ }
+ restore = ar9003_hw_rtt_force_restore(ah);
+ ar9003_hw_rtt_disable(ah);
+
+ return restore;
+}
+
static bool ar9003_hw_init_cal(struct ath_hw *ah,
struct ath9k_channel *chan)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_hw_cal_data *caldata = ah->caldata;
bool txiqcal_done = false, txclcal_done = false;
- bool is_reusable = true;
+ bool is_reusable = true, status = true;
+ bool run_rtt_cal = false, run_agc_cal;
+ bool rtt = !!(ah->caps.hw_caps & ATH9K_HW_CAP_RTT);
+ u32 agc_ctrl = 0, agc_supp_cals = AR_PHY_AGC_CONTROL_OFFSET_CAL |
+ AR_PHY_AGC_CONTROL_FLTR_CAL |
+ AR_PHY_AGC_CONTROL_PKDET_CAL;
int i, j;
u32 cl_idx[AR9300_MAX_CHAINS] = { AR_PHY_CL_TAB_0,
AR_PHY_CL_TAB_1,
AR_PHY_CL_TAB_2 };
+ if (rtt) {
+ if (!ar9003_hw_rtt_restore(ah, chan))
+ run_rtt_cal = true;
+
+ ath_dbg(common, ATH_DBG_CALIBRATE, "RTT restore %s\n",
+ run_rtt_cal ? "failed" : "succeed");
+ }
+ run_agc_cal = run_rtt_cal;
+
+ if (run_rtt_cal) {
+ ar9003_hw_rtt_enable(ah);
+ ar9003_hw_rtt_set_mask(ah, 0x00);
+ ar9003_hw_rtt_clear_hist(ah);
+ }
+
+ if (rtt && !run_rtt_cal) {
+ agc_ctrl = REG_READ(ah, AR_PHY_AGC_CONTROL);
+ agc_supp_cals &= agc_ctrl;
+ agc_ctrl &= ~(AR_PHY_AGC_CONTROL_OFFSET_CAL |
+ AR_PHY_AGC_CONTROL_FLTR_CAL |
+ AR_PHY_AGC_CONTROL_PKDET_CAL);
+ REG_WRITE(ah, AR_PHY_AGC_CONTROL, agc_ctrl);
+ }
+
if (ah->enabled_cals & TX_CL_CAL) {
if (caldata && caldata->done_txclcal_once)
REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL,
AR_PHY_CL_CAL_ENABLE);
- else
+ else {
REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL,
AR_PHY_CL_CAL_ENABLE);
+ run_agc_cal = true;
+ }
}
if (!(ah->enabled_cals & TX_IQ_CAL))
@@ -940,25 +997,41 @@
else
REG_CLR_BIT(ah, AR_PHY_TX_IQCAL_CONTROL_0,
AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL);
- txiqcal_done = true;
+ txiqcal_done = run_agc_cal = true;
goto skip_tx_iqcal;
- }
+ } else if (caldata && !caldata->done_txiqcal_once)
+ run_agc_cal = true;
+
txiqcal_done = ar9003_hw_tx_iq_cal_run(ah);
REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_DIS);
udelay(5);
REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN);
skip_tx_iqcal:
- /* Calibrate the AGC */
- REG_WRITE(ah, AR_PHY_AGC_CONTROL,
- REG_READ(ah, AR_PHY_AGC_CONTROL) |
- AR_PHY_AGC_CONTROL_CAL);
- /* Poll for offset calibration complete */
- if (!ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL,
- 0, AH_WAIT_TIMEOUT)) {
+ if (run_agc_cal) {
+ /* Calibrate the AGC */
+ REG_WRITE(ah, AR_PHY_AGC_CONTROL,
+ REG_READ(ah, AR_PHY_AGC_CONTROL) |
+ AR_PHY_AGC_CONTROL_CAL);
+
+ /* Poll for offset calibration complete */
+ status = ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL,
+ AR_PHY_AGC_CONTROL_CAL,
+ 0, AH_WAIT_TIMEOUT);
+ }
+ if (rtt && !run_rtt_cal) {
+ agc_ctrl |= agc_supp_cals;
+ REG_WRITE(ah, AR_PHY_AGC_CONTROL, agc_ctrl);
+ }
+
+ if (!status) {
+ if (run_rtt_cal)
+ ar9003_hw_rtt_disable(ah);
+
ath_dbg(common, ATH_DBG_CALIBRATE,
- "offset calibration failed to complete in 1ms; noisy environment?\n");
+ "offset calibration failed to complete in 1ms;"
+ "noisy environment?\n");
return false;
}
@@ -993,6 +1066,22 @@
}
#undef CL_TAB_ENTRY
+ if (run_rtt_cal && caldata) {
+ struct ath9k_rtt_hist *hist = &caldata->rtt_hist;
+ if (is_reusable && (hist->num_readings < RTT_HIST_MAX)) {
+ u32 *table;
+
+ for (i = 0; i < AR9300_MAX_CHAINS; i++) {
+ if (!(ah->rxchainmask & (1 << i)))
+ continue;
+ table = &hist->table[i][hist->num_readings][0];
+ ar9003_hw_rtt_fill_hist(ah, i, table);
+ }
+ }
+
+ ar9003_hw_rtt_disable(ah);
+ }
+
ath9k_hw_loadnf(ah, chan);
ath9k_hw_start_nfcal(ah, true);