From f81c1f48384d398dbe8f6c5b10377c7158086791 Mon Sep 17 00:00:00 2001 From: Wey-Yi Guy Date: Wed, 10 Nov 2010 09:56:50 -0800 Subject: iwlagn: enable shadow register For 6000 series devices and up, enable automatic update MAC's register for better power usage in PSP mode Signed-off-by: Wey-Yi Guy Signed-off-by: John W. Linville --- drivers/net/wireless/iwlwifi/iwl-tx.c | 51 ++++++++++++++++++++--------------- 1 file changed, 30 insertions(+), 21 deletions(-) (limited to 'drivers/net/wireless/iwlwifi/iwl-tx.c') diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c index 7261ee4..feaa367 100644 --- a/drivers/net/wireless/iwlwifi/iwl-tx.c +++ b/drivers/net/wireless/iwlwifi/iwl-tx.c @@ -49,30 +49,39 @@ void iwl_txq_update_write_ptr(struct iwl_priv *priv, struct iwl_tx_queue *txq) if (txq->need_update == 0) return; - /* if we're trying to save power */ - if (test_bit(STATUS_POWER_PMI, &priv->status)) { - /* wake up nic if it's powered down ... - * uCode will wake up, and interrupt us again, so next - * time we'll skip this part. */ - reg = iwl_read32(priv, CSR_UCODE_DRV_GP1); - - if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) { - IWL_DEBUG_INFO(priv, "Tx queue %d requesting wakeup, GP1 = 0x%x\n", - txq_id, reg); - iwl_set_bit(priv, CSR_GP_CNTRL, - CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); - return; - } - - iwl_write_direct32(priv, HBUS_TARG_WRPTR, - txq->q.write_ptr | (txq_id << 8)); - - /* else not in power-save mode, uCode will never sleep when we're - * trying to tx (during RFKILL, we're not trying to tx). */ - } else + if (priv->cfg->base_params->shadow_reg_enable) { + /* shadow register enabled */ iwl_write32(priv, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8)); + } else { + /* if we're trying to save power */ + if (test_bit(STATUS_POWER_PMI, &priv->status)) { + /* wake up nic if it's powered down ... + * uCode will wake up, and interrupt us again, so next + * time we'll skip this part. */ + reg = iwl_read32(priv, CSR_UCODE_DRV_GP1); + + if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) { + IWL_DEBUG_INFO(priv, + "Tx queue %d requesting wakeup," + " GP1 = 0x%x\n", txq_id, reg); + iwl_set_bit(priv, CSR_GP_CNTRL, + CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ); + return; + } + + iwl_write_direct32(priv, HBUS_TARG_WRPTR, + txq->q.write_ptr | (txq_id << 8)); + /* + * else not in power-save mode, + * uCode will never sleep when we're + * trying to tx (during RFKILL, we're not trying to tx). + */ + } else + iwl_write32(priv, HBUS_TARG_WRPTR, + txq->q.write_ptr | (txq_id << 8)); + } txq->need_update = 0; } EXPORT_SYMBOL(iwl_txq_update_write_ptr); -- cgit v1.1