* Update ath5k_hw_reset and add some more documentation about PHY calibration
* Fix ath5k_hw_set_power to use AR5K_SLEEP_CTL_SLE_ALLOW for Network sleep
* Preserve sleep duration field while setting AR5K_SLEEP_CTL and reduce delays & checks for register's status (got this from decompiling & dumps, it works for me but it needs testing)
Changes-licensed-under: ISC
Signed-off-by: Nick Kossifidis <mickflemm@xxxxxxxxx>
---
diff --git a/drivers/net/wireless/ath5k/hw.c b/drivers/net/wireless/ath5k/hw.c
index cab1a8a..4fb048c 100644
--- a/drivers/net/wireless/ath5k/hw.c
+++ b/drivers/net/wireless/ath5k/hw.c
@@ -1092,34 +1092,57 @@ int ath5k_hw_reset(struct ath5k_hw *ah, enum ieee80211_if_types op_mode,
data = 0;
/*
- * Enable calibration and wait until completion
+ * Start automatic gain calibration
+ *
+ * During AGC calibration RX path is re-routed to
+ * a signal detector so we don't receive anything.
+ *
+ * This method is used to calibrate some static offsets
+ * used together with on-the fly I/Q calibration (the
+ * one performed via ath5k_hw_phy_calibrate), that doesn't
+ * interrupt rx path.
+ *
+ * If we are in a noisy environment AGC calibration may time
+ * out.
*/
AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
AR5K_PHY_AGCCTL_CAL);
+ /* At the same time start I/Q calibration for QAM constellation
+ * -no need for CCK- */
+ ah->ah_calibration = false;
+ if (!(mode == AR5K_MODE_11B)) {
+ ah->ah_calibration = true;
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ,
+ AR5K_PHY_IQ_CAL_NUM_LOG_MAX, 15);
+ AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ,
+ AR5K_PHY_IQ_RUN);
+ }
+
+ /* Wait for gain calibration to finish (we check for I/Q calibration
+ * during ath5k_phy_calibrate) */
if (ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL,
AR5K_PHY_AGCCTL_CAL, 0, false)) {
- ATH5K_ERR(ah->ah_sc, "calibration timeout (%uMHz)\n",
+ ATH5K_ERR(ah->ah_sc, "gain calibration timeout (%uMHz)\n",
channel->center_freq);
return -EAGAIN;
}
+ /*
+ * Start noise floor calibration
+ *
+ * If we run NF calibration before AGC, it always times out.
+ * Binary HAL starts NF and AGC calibration at the same time
+ * and only waits for AGC to finish. I believe that's wrong because
+ * during NF calibration, rx path is also routed to a detector, so if
+ * it doesn't finish we won't have RX.
+ *
+ * XXX: Find an interval that's OK for all cards...
+ */
ret = ath5k_hw_noise_floor_calibration(ah, channel->center_freq);
if (ret)
return ret;
- ah->ah_calibration = false;
-
- /* A and G modes can use QAM modulation which requires enabling
- * I and Q calibration. Don't bother in B mode. */
- if (!(mode == AR5K_MODE_11B)) {
- ah->ah_calibration = true;
- AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ,
- AR5K_PHY_IQ_CAL_NUM_LOG_MAX, 15);
- AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ,
- AR5K_PHY_IQ_RUN);
- }
-
/*
* Reset queues and start beacon timers at the end of the reset routine
*/
@@ -1247,7 +1270,7 @@ int ath5k_hw_set_power(struct ath5k_hw *ah, enum ath5k_power_mode mode,
bool set_chip, u16 sleep_duration)
{
unsigned int i;
- u32 staid;
+ u32 staid, data;
ATH5K_TRACE(ah->ah_sc);
staid = ath5k_hw_reg_read(ah, AR5K_STA_ID1);
@@ -1259,7 +1282,8 @@ int ath5k_hw_set_power(struct ath5k_hw *ah, enum ath5k_power_mode mode,
case AR5K_PM_NETWORK_SLEEP:
if (set_chip)
ath5k_hw_reg_write(ah,
- AR5K_SLEEP_CTL_SLE | sleep_duration,
+ AR5K_SLEEP_CTL_SLE_ALLOW |
+ sleep_duration,
AR5K_SLEEP_CTL);
staid |= AR5K_STA_ID1_PWR_SV;
@@ -1274,13 +1298,24 @@ int ath5k_hw_set_power(struct ath5k_hw *ah, enum ath5k_power_mode mode,
break;
case AR5K_PM_AWAKE:
+
+ staid &= ~AR5K_STA_ID1_PWR_SV;
+
if (!set_chip)
goto commit;
- ath5k_hw_reg_write(ah, AR5K_SLEEP_CTL_SLE_WAKE,
- AR5K_SLEEP_CTL);
+ /* Preserve sleep duration */
+ data = ath5k_hw_reg_read(ah, AR5K_SLEEP_CTL);
+ if( data & 0xffc00000 ){
+ data = 0;
+ } else {
+ data = data & 0xfffcffff;
+ }
- for (i = 5000; i > 0; i--) {
+ ath5k_hw_reg_write(ah, data, AR5K_SLEEP_CTL);
+ udelay(15);
+
+ for (i = 50; i > 0; i--) {
/* Check if the chip did wake up */
if ((ath5k_hw_reg_read(ah, AR5K_PCICFG) &
AR5K_PCICFG_SPWR_DN) == 0)
@@ -1288,15 +1323,13 @@ int ath5k_hw_set_power(struct ath5k_hw *ah, enum ath5k_power_mode mode,
/* Wait a bit and retry */
udelay(200);
- ath5k_hw_reg_write(ah, AR5K_SLEEP_CTL_SLE_WAKE,
- AR5K_SLEEP_CTL);
+ ath5k_hw_reg_write(ah, data, AR5K_SLEEP_CTL);
}
/* Fail if the chip didn't wake up */
if (i <= 0)
return -EIO;
- staid &= ~AR5K_STA_ID1_PWR_SV;
break;
default:
@@ -1325,6 +1358,7 @@ void ath5k_hw_start_rx(struct ath5k_hw *ah)
{
ATH5K_TRACE(ah->ah_sc);
ath5k_hw_reg_write(ah, AR5K_CR_RXE, AR5K_CR);
+ ath5k_hw_reg_read(ah, AR5K_CR);
}
/*
@@ -1411,6 +1445,7 @@ int ath5k_hw_tx_start(struct ath5k_hw *ah, unsigned int queue)
}
/* Start queue */
ath5k_hw_reg_write(ah, tx_queue, AR5K_CR);
+ ath5k_hw_reg_read(ah, AR5K_CR);
} else {
/* Return if queue is disabled */
if (AR5K_REG_READ_Q(ah, AR5K_QCU_TXD, queue))
@@ -1461,6 +1496,7 @@ int ath5k_hw_stop_tx_dma(struct ath5k_hw *ah, unsigned int queue)
/* Stop queue */
ath5k_hw_reg_write(ah, tx_queue, AR5K_CR);
+ ath5k_hw_reg_read(ah, AR5K_CR);
} else {
/*
* Schedule TX disable and wait until queue is empty
@@ -1705,6 +1741,7 @@ enum ath5k_int ath5k_hw_set_intr(struct ath5k_hw *ah, enum ath5k_int new_mask)
* (they will be re-enabled afterwards).
*/
ath5k_hw_reg_write(ah, AR5K_IER_DISABLE, AR5K_IER);
+ ath5k_hw_reg_read(ah, AR5K_IER);
old_mask = ah->ah_imr;
@@ -1737,6 +1774,7 @@ enum ath5k_int ath5k_hw_set_intr(struct ath5k_hw *ah, enum ath5k_int new_mask)
/* ..re-enable interrupts */
ath5k_hw_reg_write(ah, AR5K_IER_ENABLE, AR5K_IER);
+ ath5k_hw_reg_read(ah, AR5K_IER);
return old_mask;
}
@@ -3507,7 +3545,7 @@ int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue)
if (tq->tqi_flags & AR5K_TXQ_FLAG_RDYTIME_EXP_POLICY_ENABLE)
AR5K_REG_ENABLE_BITS(ah,
AR5K_QUEUE_MISC(queue),
- AR5K_QCU_MISC_TXE);
+ AR5K_QCU_MISC_RDY_VEOL_POLICY);
}
if (tq->tqi_flags & AR5K_TXQ_FLAG_BACKOFF_DISABLE)
--
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