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ath9k: improve reliability of the noise floor calibration
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22126 3c298f89-4303-0410-b956-a3cf2f4a3e73
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399
package/mac80211/patches/526-ath9k_improve_nf_cal.patch
Normal file
399
package/mac80211/patches/526-ath9k_improve_nf_cal.patch
Normal file
@ -0,0 +1,399 @@
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--- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c
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+++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
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@@ -1518,77 +1518,6 @@ static void ar5008_hw_do_getnf(struct at
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nfarray[5] = sign_extend(nf, 9);
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}
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-static void ar5008_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
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-{
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- struct ath9k_nfcal_hist *h;
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- int i, j;
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- int32_t val;
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- const u32 ar5416_cca_regs[6] = {
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- AR_PHY_CCA,
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- AR_PHY_CH1_CCA,
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- AR_PHY_CH2_CCA,
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- AR_PHY_EXT_CCA,
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- AR_PHY_CH1_EXT_CCA,
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- AR_PHY_CH2_EXT_CCA
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- };
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- u8 chainmask, rx_chain_status;
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-
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- rx_chain_status = REG_READ(ah, AR_PHY_RX_CHAINMASK);
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- if (AR_SREV_9285(ah) || AR_SREV_9271(ah))
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- chainmask = 0x9;
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- else if (AR_SREV_9280(ah) || AR_SREV_9287(ah)) {
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- if ((rx_chain_status & 0x2) || (rx_chain_status & 0x4))
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- chainmask = 0x1B;
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- else
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- chainmask = 0x09;
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- } else {
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- if (rx_chain_status & 0x4)
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- chainmask = 0x3F;
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- else if (rx_chain_status & 0x2)
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- chainmask = 0x1B;
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- else
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- chainmask = 0x09;
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- }
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-
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- h = ah->nfCalHist;
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-
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- for (i = 0; i < NUM_NF_READINGS; i++) {
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- if (chainmask & (1 << i)) {
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- val = REG_READ(ah, ar5416_cca_regs[i]);
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- val &= 0xFFFFFE00;
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- val |= (((u32) (h[i].privNF) << 1) & 0x1ff);
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- REG_WRITE(ah, ar5416_cca_regs[i], val);
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- }
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- }
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-
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- REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
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- AR_PHY_AGC_CONTROL_ENABLE_NF);
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- REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
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- AR_PHY_AGC_CONTROL_NO_UPDATE_NF);
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- REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
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-
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- for (j = 0; j < 5; j++) {
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- if ((REG_READ(ah, AR_PHY_AGC_CONTROL) &
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- AR_PHY_AGC_CONTROL_NF) == 0)
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- break;
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- udelay(50);
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- }
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-
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- ENABLE_REGWRITE_BUFFER(ah);
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-
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- for (i = 0; i < NUM_NF_READINGS; i++) {
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- if (chainmask & (1 << i)) {
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- val = REG_READ(ah, ar5416_cca_regs[i]);
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- val &= 0xFFFFFE00;
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- val |= (((u32) (-50) << 1) & 0x1ff);
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- REG_WRITE(ah, ar5416_cca_regs[i], val);
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- }
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- }
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-
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- REGWRITE_BUFFER_FLUSH(ah);
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- DISABLE_REGWRITE_BUFFER(ah);
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-}
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-
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/*
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* Initialize the ANI register values with default (ini) values.
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* This routine is called during a (full) hardware reset after
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@@ -1666,6 +1595,14 @@ static void ar5008_hw_set_nf_limits(stru
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void ar5008_hw_attach_phy_ops(struct ath_hw *ah)
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{
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struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
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+ const u32 ar5416_cca_regs[6] = {
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+ AR_PHY_CCA,
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+ AR_PHY_CH1_CCA,
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+ AR_PHY_CH2_CCA,
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+ AR_PHY_EXT_CCA,
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+ AR_PHY_CH1_EXT_CCA,
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+ AR_PHY_CH2_EXT_CCA
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+ };
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priv_ops->rf_set_freq = ar5008_hw_set_channel;
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priv_ops->spur_mitigate_freq = ar5008_hw_spur_mitigate;
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@@ -1685,7 +1622,6 @@ void ar5008_hw_attach_phy_ops(struct ath
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priv_ops->restore_chainmask = ar5008_restore_chainmask;
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priv_ops->set_diversity = ar5008_set_diversity;
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priv_ops->do_getnf = ar5008_hw_do_getnf;
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- priv_ops->loadnf = ar5008_hw_loadnf;
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if (modparam_force_new_ani) {
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priv_ops->ani_control = ar5008_hw_ani_control_new;
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@@ -1701,4 +1637,5 @@ void ar5008_hw_attach_phy_ops(struct ath
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priv_ops->compute_pll_control = ar5008_hw_compute_pll_control;
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ar5008_hw_set_nf_limits(ah);
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+ memcpy(ah->nf_regs, ar5416_cca_regs, sizeof(ah->nf_regs));
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}
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--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c
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+++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
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@@ -1050,106 +1050,6 @@ static void ar9003_hw_set_nf_limits(stru
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}
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/*
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- * Find out which of the RX chains are enabled
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- */
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-static u32 ar9003_hw_get_rx_chainmask(struct ath_hw *ah)
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-{
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- u32 chain = REG_READ(ah, AR_PHY_RX_CHAINMASK);
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- /*
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- * The bits [2:0] indicate the rx chain mask and are to be
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- * interpreted as follows:
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- * 00x => Only chain 0 is enabled
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- * 01x => Chain 1 and 0 enabled
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- * 1xx => Chain 2,1 and 0 enabled
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- */
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- return chain & 0x7;
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-}
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-
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-static void ar9003_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
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-{
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- struct ath9k_nfcal_hist *h;
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- unsigned i, j;
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- int32_t val;
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- const u32 ar9300_cca_regs[6] = {
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- AR_PHY_CCA_0,
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- AR_PHY_CCA_1,
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- AR_PHY_CCA_2,
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- AR_PHY_EXT_CCA,
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- AR_PHY_EXT_CCA_1,
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- AR_PHY_EXT_CCA_2,
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- };
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- u8 chainmask, rx_chain_status;
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- struct ath_common *common = ath9k_hw_common(ah);
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-
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- rx_chain_status = ar9003_hw_get_rx_chainmask(ah);
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-
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- chainmask = 0x3F;
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- h = ah->nfCalHist;
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-
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- for (i = 0; i < NUM_NF_READINGS; i++) {
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- if (chainmask & (1 << i)) {
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- val = REG_READ(ah, ar9300_cca_regs[i]);
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- val &= 0xFFFFFE00;
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- val |= (((u32) (h[i].privNF) << 1) & 0x1ff);
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- REG_WRITE(ah, ar9300_cca_regs[i], val);
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- }
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- }
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-
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- /*
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- * Load software filtered NF value into baseband internal minCCApwr
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- * variable.
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- */
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- REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
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- AR_PHY_AGC_CONTROL_ENABLE_NF);
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- REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
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- AR_PHY_AGC_CONTROL_NO_UPDATE_NF);
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- REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
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-
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- /*
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- * Wait for load to complete, should be fast, a few 10s of us.
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- * The max delay was changed from an original 250us to 10000us
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- * since 250us often results in NF load timeout and causes deaf
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- * condition during stress testing 12/12/2009
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- */
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- for (j = 0; j < 1000; j++) {
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- if ((REG_READ(ah, AR_PHY_AGC_CONTROL) &
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- AR_PHY_AGC_CONTROL_NF) == 0)
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- break;
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- udelay(10);
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- }
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-
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- /*
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- * We timed out waiting for the noisefloor to load, probably due to an
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- * in-progress rx. Simply return here and allow the load plenty of time
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- * to complete before the next calibration interval. We need to avoid
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- * trying to load -50 (which happens below) while the previous load is
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- * still in progress as this can cause rx deafness. Instead by returning
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- * here, the baseband nf cal will just be capped by our present
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- * noisefloor until the next calibration timer.
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- */
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- if (j == 1000) {
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- ath_print(common, ATH_DBG_ANY, "Timeout while waiting for nf "
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- "to load: AR_PHY_AGC_CONTROL=0x%x\n",
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- REG_READ(ah, AR_PHY_AGC_CONTROL));
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- return;
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- }
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-
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- /*
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- * Restore maxCCAPower register parameter again so that we're not capped
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- * by the median we just loaded. This will be initial (and max) value
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- * of next noise floor calibration the baseband does.
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- */
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- for (i = 0; i < NUM_NF_READINGS; i++) {
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- if (chainmask & (1 << i)) {
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- val = REG_READ(ah, ar9300_cca_regs[i]);
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- val &= 0xFFFFFE00;
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- val |= (((u32) (-50) << 1) & 0x1ff);
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- REG_WRITE(ah, ar9300_cca_regs[i], val);
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- }
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- }
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-}
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-
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-/*
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* Initialize the ANI register values with default (ini) values.
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* This routine is called during a (full) hardware reset after
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* all the registers are initialised from the INI.
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@@ -1216,6 +1116,14 @@ static void ar9003_hw_ani_cache_ini_regs
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void ar9003_hw_attach_phy_ops(struct ath_hw *ah)
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{
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struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
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+ const u32 ar9300_cca_regs[6] = {
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+ AR_PHY_CCA_0,
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+ AR_PHY_CCA_1,
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+ AR_PHY_CCA_2,
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+ AR_PHY_EXT_CCA,
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+ AR_PHY_EXT_CCA_1,
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+ AR_PHY_EXT_CCA_2,
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+ };
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priv_ops->rf_set_freq = ar9003_hw_set_channel;
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priv_ops->spur_mitigate_freq = ar9003_hw_spur_mitigate;
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@@ -1232,10 +1140,10 @@ void ar9003_hw_attach_phy_ops(struct ath
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priv_ops->set_diversity = ar9003_hw_set_diversity;
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priv_ops->ani_control = ar9003_hw_ani_control;
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priv_ops->do_getnf = ar9003_hw_do_getnf;
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- priv_ops->loadnf = ar9003_hw_loadnf;
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priv_ops->ani_cache_ini_regs = ar9003_hw_ani_cache_ini_regs;
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ar9003_hw_set_nf_limits(ah);
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+ memcpy(ah->nf_regs, ar9300_cca_regs, sizeof(ah->nf_regs));
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}
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void ar9003_hw_bb_watchdog_config(struct ath_hw *ah)
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--- a/drivers/net/wireless/ath/ath9k/calib.c
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+++ b/drivers/net/wireless/ath/ath9k/calib.c
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@@ -167,6 +167,100 @@ void ath9k_hw_start_nfcal(struct ath_hw
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REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
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}
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+void ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
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+{
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+ struct ath9k_nfcal_hist *h;
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+ unsigned i, j;
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+ int32_t val;
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+ u8 chainmask;
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+ struct ath_common *common = ath9k_hw_common(ah);
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+
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+ if (AR_SREV_9300_20_OR_LATER(ah))
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+ chainmask = 0x3F;
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+ else if (AR_SREV_9285(ah) || AR_SREV_9271(ah))
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+ chainmask = 0x9;
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+ else if (AR_SREV_9280(ah) || AR_SREV_9287(ah)) {
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+ if ((ah->rxchainmask & 0x2) || (ah->rxchainmask & 0x4))
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+ chainmask = 0x1B;
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+ else
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+ chainmask = 0x09;
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+ } else {
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+ if (ah->rxchainmask & 0x4)
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+ chainmask = 0x3F;
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+ else if (ah->rxchainmask & 0x2)
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+ chainmask = 0x1B;
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+ else
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+ chainmask = 0x09;
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+ }
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+ h = ah->nfCalHist;
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+
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+ for (i = 0; i < NUM_NF_READINGS; i++) {
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+ if (chainmask & (1 << i)) {
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+ val = REG_READ(ah, ah->nf_regs[i]);
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+ val &= 0xFFFFFE00;
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+ val |= (((u32) (h[i].privNF) << 1) & 0x1ff);
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+ REG_WRITE(ah, ah->nf_regs[i], val);
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+ }
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+ }
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+
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+ /*
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+ * Load software filtered NF value into baseband internal minCCApwr
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+ * variable.
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+ */
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+ REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
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+ AR_PHY_AGC_CONTROL_ENABLE_NF);
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+ REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL,
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+ AR_PHY_AGC_CONTROL_NO_UPDATE_NF);
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+ REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
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+
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+ /*
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+ * Wait for load to complete, should be fast, a few 10s of us.
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+ * The max delay was changed from an original 250us to 10000us
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+ * since 250us often results in NF load timeout and causes deaf
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+ * condition during stress testing 12/12/2009
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+ */
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+ for (j = 0; j < 1000; j++) {
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+ if ((REG_READ(ah, AR_PHY_AGC_CONTROL) &
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+ AR_PHY_AGC_CONTROL_NF) == 0)
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+ break;
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+ udelay(10);
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+ }
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+
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+ /*
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+ * We timed out waiting for the noisefloor to load, probably due to an
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+ * in-progress rx. Simply return here and allow the load plenty of time
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+ * to complete before the next calibration interval. We need to avoid
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+ * trying to load -50 (which happens below) while the previous load is
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+ * still in progress as this can cause rx deafness. Instead by returning
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+ * here, the baseband nf cal will just be capped by our present
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+ * noisefloor until the next calibration timer.
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+ */
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+ if (j == 1000) {
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+ ath_print(common, ATH_DBG_ANY, "Timeout while waiting for nf "
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+ "to load: AR_PHY_AGC_CONTROL=0x%x\n",
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+ REG_READ(ah, AR_PHY_AGC_CONTROL));
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+ return;
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+ }
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+
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+ /*
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+ * Restore maxCCAPower register parameter again so that we're not capped
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+ * by the median we just loaded. This will be initial (and max) value
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+ * of next noise floor calibration the baseband does.
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+ */
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+ ENABLE_REGWRITE_BUFFER(ah);
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+ for (i = 0; i < NUM_NF_READINGS; i++) {
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+ if (chainmask & (1 << i)) {
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+ val = REG_READ(ah, ah->nf_regs[i]);
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+ val &= 0xFFFFFE00;
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+ val |= (((u32) (-50) << 1) & 0x1ff);
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+ REG_WRITE(ah, ah->nf_regs[i], val);
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+ }
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+ }
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+ REGWRITE_BUFFER_FLUSH(ah);
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+ DISABLE_REGWRITE_BUFFER(ah);
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+}
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+
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+
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static void ath9k_hw_nf_sanitize(struct ath_hw *ah, s16 *nf)
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{
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struct ath_common *common = ath9k_hw_common(ah);
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--- a/drivers/net/wireless/ath/ath9k/calib.h
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+++ b/drivers/net/wireless/ath/ath9k/calib.h
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@@ -109,6 +109,7 @@ struct ath9k_pacal_info{
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bool ath9k_hw_reset_calvalid(struct ath_hw *ah);
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void ath9k_hw_start_nfcal(struct ath_hw *ah);
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+void ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan);
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int16_t ath9k_hw_getnf(struct ath_hw *ah,
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struct ath9k_channel *chan);
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void ath9k_init_nfcal_hist_buffer(struct ath_hw *ah);
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--- a/drivers/net/wireless/ath/ath9k/hw-ops.h
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+++ b/drivers/net/wireless/ath/ath9k/hw-ops.h
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@@ -264,12 +264,6 @@ static inline void ath9k_hw_do_getnf(str
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ath9k_hw_private_ops(ah)->do_getnf(ah, nfarray);
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}
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-static inline void ath9k_hw_loadnf(struct ath_hw *ah,
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- struct ath9k_channel *chan)
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-{
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- ath9k_hw_private_ops(ah)->loadnf(ah, chan);
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-}
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-
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static inline bool ath9k_hw_init_cal(struct ath_hw *ah,
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struct ath9k_channel *chan)
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{
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--- a/drivers/net/wireless/ath/ath9k/hw.h
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+++ b/drivers/net/wireless/ath/ath9k/hw.h
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@@ -510,7 +510,6 @@ struct ath_gen_timer_table {
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* AR_RTC_PLL_CONTROL for a given channel
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* @setup_calibration: set up calibration
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* @iscal_supported: used to query if a type of calibration is supported
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- * @loadnf: load noise floor read from each chain on the CCA registers
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*
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* @ani_reset: reset ANI parameters to default values
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* @ani_lower_immunity: lower the noise immunity level. The level controls
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@@ -564,7 +563,6 @@ struct ath_hw_private_ops {
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bool (*ani_control)(struct ath_hw *ah, enum ath9k_ani_cmd cmd,
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int param);
|
||||
void (*do_getnf)(struct ath_hw *ah, int16_t nfarray[NUM_NF_READINGS]);
|
||||
- void (*loadnf)(struct ath_hw *ah, struct ath9k_channel *chan);
|
||||
|
||||
/* ANI */
|
||||
void (*ani_reset)(struct ath_hw *ah, bool is_scanning);
|
||||
@@ -658,6 +656,7 @@ struct ath_hw {
|
||||
bool need_an_top2_fixup;
|
||||
u16 tx_trig_level;
|
||||
|
||||
+ u32 nf_regs[6];
|
||||
struct ath_nf_limits nf_2g;
|
||||
struct ath_nf_limits nf_5g;
|
||||
u16 rfsilent;
|
Loading…
Reference in New Issue
Block a user