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iwlwifi: introduce trans_ops->stop_hw
This handler stops the HW and puts it in low power state. It will allow to clean up the flows in the upper layers. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
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parent
a6c684ee48
commit
cc56feb2eb
5 changed files with 61 additions and 44 deletions
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@ -1839,7 +1839,7 @@ int iwl_probe(struct iwl_bus *bus, const struct iwl_trans_ops *trans_ops,
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/* Read the EEPROM */
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err = iwl_eeprom_init(priv, hw_rev);
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/* Reset chip to save power until we load uCode during "up". */
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iwl_apm_stop(priv);
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iwl_trans_stop_hw(trans(priv));
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if (err) {
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IWL_ERR(priv, "Unable to init EEPROM\n");
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goto out_free_traffic_mem;
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@ -883,46 +883,6 @@ void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
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}
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}
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static int iwl_apm_stop_master(struct iwl_priv *priv)
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{
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int ret = 0;
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/* stop device's busmaster DMA activity */
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iwl_set_bit(trans(priv), CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
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ret = iwl_poll_bit(trans(priv), CSR_RESET,
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CSR_RESET_REG_FLAG_MASTER_DISABLED,
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CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
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if (ret)
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IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
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IWL_DEBUG_INFO(priv, "stop master\n");
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return ret;
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}
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void iwl_apm_stop(struct iwl_priv *priv)
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{
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IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
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clear_bit(STATUS_DEVICE_ENABLED, &priv->shrd->status);
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/* Stop device's DMA activity */
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iwl_apm_stop_master(priv);
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/* Reset the entire device */
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iwl_set_bit(trans(priv), CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
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udelay(10);
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/*
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* Clear "initialization complete" bit to move adapter from
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* D0A* (powered-up Active) --> D0U* (Uninitialized) state.
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*/
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iwl_clear_bit(trans(priv), CSR_GP_CNTRL,
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CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
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}
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int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
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{
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int ret;
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@ -543,7 +543,6 @@ int iwlagn_hw_valid_rtc_data_addr(u32 addr);
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void iwl_set_hw_rfkill_state(struct iwl_priv *priv, bool state);
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void iwl_nic_config(struct iwl_priv *priv);
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void iwl_free_skb(struct iwl_priv *priv, struct sk_buff *skb);
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void iwl_apm_stop(struct iwl_priv *priv);
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void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand);
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const char *get_cmd_string(u8 cmd);
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bool iwl_check_for_ct_kill(struct iwl_priv *priv);
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@ -714,6 +714,46 @@ static int iwl_apm_init(struct iwl_trans *trans)
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return ret;
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}
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static int iwl_apm_stop_master(struct iwl_trans *trans)
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{
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int ret = 0;
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/* stop device's busmaster DMA activity */
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iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
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ret = iwl_poll_bit(trans, CSR_RESET,
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CSR_RESET_REG_FLAG_MASTER_DISABLED,
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CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
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if (ret)
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IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n");
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IWL_DEBUG_INFO(trans, "stop master\n");
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return ret;
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}
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static void iwl_apm_stop(struct iwl_trans *trans)
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{
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IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n");
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clear_bit(STATUS_DEVICE_ENABLED, &trans->shrd->status);
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/* Stop device's DMA activity */
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iwl_apm_stop_master(trans);
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/* Reset the entire device */
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iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
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udelay(10);
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/*
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* Clear "initialization complete" bit to move adapter from
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* D0A* (powered-up Active) --> D0U* (Uninitialized) state.
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*/
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iwl_clear_bit(trans, CSR_GP_CNTRL,
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CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
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}
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static int iwl_nic_init(struct iwl_trans *trans)
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{
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unsigned long flags;
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@ -1118,7 +1158,7 @@ static void iwl_trans_pcie_stop_device(struct iwl_trans *trans)
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CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
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/* Stop the device, and put it in low power state */
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iwl_apm_stop(priv(trans));
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iwl_apm_stop(trans);
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/* Upon stop, the APM issues an interrupt if HW RF kill is set.
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* Clean again the interrupt here
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@ -1361,6 +1401,15 @@ static int iwl_trans_pcie_start_hw(struct iwl_trans *trans)
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return err;
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}
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static void iwl_trans_pcie_stop_hw(struct iwl_trans *trans)
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{
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iwl_apm_stop(trans);
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/* Even if we stop the HW, we still want the RF kill interrupt */
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IWL_DEBUG_ISR(trans, "Enabling rfkill interrupt\n");
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iwl_write32(trans, CSR_INT_MASK, CSR_INT_BIT_RF_KILL);
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}
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static int iwl_trans_pcie_reclaim(struct iwl_trans *trans, int sta_id, int tid,
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int txq_id, int ssn, u32 status,
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struct sk_buff_head *skbs)
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@ -1455,7 +1504,7 @@ static int iwl_trans_pcie_suspend(struct iwl_trans *trans)
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* things already :-)
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*/
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if (!trans->shrd->wowlan) {
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iwl_apm_stop(priv(trans));
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iwl_apm_stop(trans);
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} else {
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iwl_disable_interrupts(trans);
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iwl_clear_bit(trans, CSR_GP_CNTRL,
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@ -2024,6 +2073,7 @@ static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans,
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const struct iwl_trans_ops trans_ops_pcie = {
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.start_hw = iwl_trans_pcie_start_hw,
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.stop_hw = iwl_trans_pcie_stop_hw,
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.fw_alive = iwl_trans_pcie_fw_alive,
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.start_device = iwl_trans_pcie_start_device,
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.stop_device = iwl_trans_pcie_stop_device,
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@ -134,6 +134,8 @@ struct iwl_host_cmd {
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/**
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* struct iwl_trans_ops - transport specific operations
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* @start_hw: starts the HW- from that point on, the HW can send interrupts
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* @stop_hw: stops the HW- from that point on, the HW will be in low power but
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* will still issue interrupt if the HW RF kill is triggered.
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* @start_device: allocates and inits all the resources for the transport
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* layer.
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* @fw_alive: called when the fw sends alive notification
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@ -163,6 +165,7 @@ struct iwl_host_cmd {
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struct iwl_trans_ops {
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int (*start_hw)(struct iwl_trans *iwl_trans);
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void (*stop_hw)(struct iwl_trans *iwl_trans);
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int (*start_device)(struct iwl_trans *trans);
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void (*fw_alive)(struct iwl_trans *trans);
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void (*stop_device)(struct iwl_trans *trans);
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@ -271,6 +274,11 @@ static inline int iwl_trans_start_hw(struct iwl_trans *trans)
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return trans->ops->start_hw(trans);
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}
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static inline void iwl_trans_stop_hw(struct iwl_trans *trans)
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{
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trans->ops->stop_hw(trans);
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}
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static inline void iwl_trans_fw_alive(struct iwl_trans *trans)
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{
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trans->ops->fw_alive(trans);
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