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iwlwifi: pcie: only apply retention workaround on 9000-series A-step 

Due to a hardware issue, certain power saving had to be
disabled. However, this issue was fixed in B-step, so the
workaround only needs to apply to A-step.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Johannes Berg 2017-05-10 11:31:06 +02:00 committed by Luca Coelho
parent 779e0513c7
commit 565291c60a
1 changed files with 13 additions and 6 deletions
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19
drivers/net/wireless/intel/iwlwifi/pcie/rx.c
View File

@ -761,6 +761,15 @@ static void iwl_pcie_rx_hw_init(struct iwl_trans *trans, struct iwl_rxq *rxq)
void iwl_pcie_enable_rx_wake(struct iwl_trans *trans, bool enable)
{
if (trans->cfg->device_family != IWL_DEVICE_FAMILY_9000)
return;
if (CSR_HW_REV_STEP(trans->hw_rev) != SILICON_A_STEP)
return;
if (!trans->cfg->integrated)
return;
/*
* Turn on the chicken-bits that cause MAC wakeup for RX-related
* values.
@ -768,12 +777,10 @@ void iwl_pcie_enable_rx_wake(struct iwl_trans *trans, bool enable)
* bug where shadow registers are not in the retention list and their
* value is lost when NIC powers down
*/
if (trans->cfg->integrated) {
iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL,
CSR_MAC_SHADOW_REG_CTRL_RX_WAKE);
iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTL2,
CSR_MAC_SHADOW_REG_CTL2_RX_WAKE);
}
iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTRL,
CSR_MAC_SHADOW_REG_CTRL_RX_WAKE);
iwl_set_bit(trans, CSR_MAC_SHADOW_REG_CTL2,
CSR_MAC_SHADOW_REG_CTL2_RX_WAKE);
}
static void iwl_pcie_rx_mq_hw_init(struct iwl_trans *trans)