diff mbox series

[21/21] iwlwifi: implement BISR HW workaround for 22260 devices

Message ID 20190131202206.15903-22-luca@coelho.fi (mailing list archive)
State Accepted
Delegated to: Luca Coelho
Headers show
Series iwlwifi: updates intended for v5.1 2019-01-31 | expand

Commit Message

Luca Coelho Jan. 31, 2019, 8:22 p.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

There's a small hardware bug in 22260 devices which thus require a
few more delays during initialization. Implement this workaround.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/cfg/22000.c  |  3 +++
 drivers/net/wireless/intel/iwlwifi/iwl-config.h |  4 +++-
 drivers/net/wireless/intel/iwlwifi/iwl-io.c     | 10 ++++++++++
 3 files changed, 16 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/wireless/intel/iwlwifi/cfg/22000.c b/drivers/net/wireless/intel/iwlwifi/cfg/22000.c
index c547288d32aa..28d8c3477371 100644
--- a/drivers/net/wireless/intel/iwlwifi/cfg/22000.c
+++ b/drivers/net/wireless/intel/iwlwifi/cfg/22000.c
@@ -220,6 +220,7 @@  const struct iwl_cfg iwl22260_2ax_cfg = {
 	 * HT size; mac80211 would otherwise pick the HE max (256) by default.
 	 */
 	.max_tx_agg_size = IEEE80211_MAX_AMPDU_BUF_HT,
+	.bisr_workaround = 1,
 };
 
 const struct iwl_cfg killer1650x_2ax_cfg = {
@@ -232,6 +233,7 @@  const struct iwl_cfg killer1650x_2ax_cfg = {
 	 * HT size; mac80211 would otherwise pick the HE max (256) by default.
 	 */
 	.max_tx_agg_size = IEEE80211_MAX_AMPDU_BUF_HT,
+	.bisr_workaround = 1,
 };
 
 const struct iwl_cfg killer1650w_2ax_cfg = {
@@ -244,6 +246,7 @@  const struct iwl_cfg killer1650w_2ax_cfg = {
 	 * HT size; mac80211 would otherwise pick the HE max (256) by default.
 	 */
 	.max_tx_agg_size = IEEE80211_MAX_AMPDU_BUF_HT,
+	.bisr_workaround = 1,
 };
 
 /*
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-config.h b/drivers/net/wireless/intel/iwlwifi/iwl-config.h
index f1e493380713..5e713730165a 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-config.h
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-config.h
@@ -379,6 +379,7 @@  struct iwl_csr_params {
  * @nvm_type: see &enum iwl_nvm_type
  * @d3_debug_data_base_addr: base address where D3 debug data is stored
  * @d3_debug_data_length: length of the D3 debug data
+ * @bisr_workaround: BISR hardware workaround (for 22260 series devices)
  *
  * We enable the driver to be backward compatible wrt. hardware features.
  * API differences in uCode shouldn't be handled here but through TLVs
@@ -428,7 +429,8 @@  struct iwl_cfg {
 	    use_tfh:1,
 	    gen2:1,
 	    cdb:1,
-	    dbgc_supported:1;
+	    dbgc_supported:1,
+	    bisr_workaround:1;
 	u8 valid_tx_ant;
 	u8 valid_rx_ant;
 	u8 non_shared_ant;
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-io.c b/drivers/net/wireless/intel/iwlwifi/iwl-io.c
index 4ea5883f9175..bf171edad53a 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-io.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-io.c
@@ -493,6 +493,11 @@  int iwl_finish_nic_init(struct iwl_trans *trans)
 {
 	int err;
 
+	if (trans->cfg->bisr_workaround) {
+		/* ensure the TOP FSM isn't still in previous reset */
+		mdelay(2);
+	}
+
 	/*
 	 * Set "initialization complete" bit to move adapter from
 	 * D0U* --> D0A* (powered-up active) state.
@@ -515,6 +520,11 @@  int iwl_finish_nic_init(struct iwl_trans *trans)
 	if (err < 0)
 		IWL_DEBUG_INFO(trans, "Failed to wake NIC\n");
 
+	if (trans->cfg->bisr_workaround) {
+		/* ensure BISR shift has finished */
+		udelay(200);
+	}
+
 	return err < 0 ? err : 0;
 }
 IWL_EXPORT_SYMBOL(iwl_finish_nic_init);