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iwlwifi: introduce trans_ops->stop_hw

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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>
This commit is contained in:
Emmanuel Grumbach 2012-01-08 13:37:59 +02:00 committed by Wey-Yi Guy
parent a6c684ee48
commit cc56feb2eb
5 changed files with 61 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/wireless/iwlwifi/iwl-agn.c
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@ -1839,7 +1839,7 @@ int iwl_probe(struct iwl_bus *bus, const struct iwl_trans_ops *trans_ops,
/* Read the EEPROM */
err = iwl_eeprom_init(priv, hw_rev);
/* Reset chip to save power until we load uCode during "up". */
iwl_apm_stop(priv);
iwl_trans_stop_hw(trans(priv));
if (err) {
IWL_ERR(priv, "Unable to init EEPROM\n");
goto out_free_traffic_mem;

40
drivers/net/wireless/iwlwifi/iwl-core.c
View File

@ -883,46 +883,6 @@ void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
}
}
static int iwl_apm_stop_master(struct iwl_priv *priv)
{
int ret = 0;
/* stop device's busmaster DMA activity */
iwl_set_bit(trans(priv), CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
ret = iwl_poll_bit(trans(priv), CSR_RESET,
CSR_RESET_REG_FLAG_MASTER_DISABLED,
CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
if (ret)
IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
IWL_DEBUG_INFO(priv, "stop master\n");
return ret;
}
void iwl_apm_stop(struct iwl_priv *priv)
{
IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
clear_bit(STATUS_DEVICE_ENABLED, &priv->shrd->status);
/* Stop device's DMA activity */
iwl_apm_stop_master(priv);
/* Reset the entire device */
iwl_set_bit(trans(priv), CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
udelay(10);
/*
* Clear "initialization complete" bit to move adapter from
* D0A* (powered-up Active) --> D0U* (Uninitialized) state.
*/
iwl_clear_bit(trans(priv), CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
}
int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
{
int ret;

1
drivers/net/wireless/iwlwifi/iwl-shared.h
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@ -543,7 +543,6 @@ int iwlagn_hw_valid_rtc_data_addr(u32 addr);
void iwl_set_hw_rfkill_state(struct iwl_priv *priv, bool state);
void iwl_nic_config(struct iwl_priv *priv);
void iwl_free_skb(struct iwl_priv *priv, struct sk_buff *skb);
void iwl_apm_stop(struct iwl_priv *priv);
void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand);
const char *get_cmd_string(u8 cmd);
bool iwl_check_for_ct_kill(struct iwl_priv *priv);

54
drivers/net/wireless/iwlwifi/iwl-trans-pcie.c
View File

@ -714,6 +714,46 @@ out:
return ret;
}
static int iwl_apm_stop_master(struct iwl_trans *trans)
{
int ret = 0;
/* stop device's busmaster DMA activity */
iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
ret = iwl_poll_bit(trans, CSR_RESET,
CSR_RESET_REG_FLAG_MASTER_DISABLED,
CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
if (ret)
IWL_WARN(trans, "Master Disable Timed Out, 100 usec\n");
IWL_DEBUG_INFO(trans, "stop master\n");
return ret;
}
static void iwl_apm_stop(struct iwl_trans *trans)
{
IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n");
clear_bit(STATUS_DEVICE_ENABLED, &trans->shrd->status);
/* Stop device's DMA activity */
iwl_apm_stop_master(trans);
/* Reset the entire device */
iwl_set_bit(trans, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
udelay(10);
/*
* Clear "initialization complete" bit to move adapter from
* D0A* (powered-up Active) --> D0U* (Uninitialized) state.
*/
iwl_clear_bit(trans, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
}
static int iwl_nic_init(struct iwl_trans *trans)
{
unsigned long flags;
@ -1118,7 +1158,7 @@ static void iwl_trans_pcie_stop_device(struct iwl_trans *trans)
CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
/* Stop the device, and put it in low power state */
iwl_apm_stop(priv(trans));
iwl_apm_stop(trans);
/* Upon stop, the APM issues an interrupt if HW RF kill is set.
* Clean again the interrupt here
@ -1361,6 +1401,15 @@ error:
return err;
}
static void iwl_trans_pcie_stop_hw(struct iwl_trans *trans)
{
iwl_apm_stop(trans);
/* Even if we stop the HW, we still want the RF kill interrupt */
IWL_DEBUG_ISR(trans, "Enabling rfkill interrupt\n");
iwl_write32(trans, CSR_INT_MASK, CSR_INT_BIT_RF_KILL);
}
static int iwl_trans_pcie_reclaim(struct iwl_trans *trans, int sta_id, int tid,
int txq_id, int ssn, u32 status,
struct sk_buff_head *skbs)
@ -1455,7 +1504,7 @@ static int iwl_trans_pcie_suspend(struct iwl_trans *trans)
* things already :-)
*/
if (!trans->shrd->wowlan) {
iwl_apm_stop(priv(trans));
iwl_apm_stop(trans);
} else {
iwl_disable_interrupts(trans);
iwl_clear_bit(trans, CSR_GP_CNTRL,
@ -2024,6 +2073,7 @@ static int iwl_trans_pcie_dbgfs_register(struct iwl_trans *trans,
const struct iwl_trans_ops trans_ops_pcie = {
.start_hw = iwl_trans_pcie_start_hw,
.stop_hw = iwl_trans_pcie_stop_hw,
.fw_alive = iwl_trans_pcie_fw_alive,
.start_device = iwl_trans_pcie_start_device,
.stop_device = iwl_trans_pcie_stop_device,

8
drivers/net/wireless/iwlwifi/iwl-trans.h
View File

@ -134,6 +134,8 @@ struct iwl_host_cmd {
/**
* struct iwl_trans_ops - transport specific operations
* @start_hw: starts the HW- from that point on, the HW can send interrupts
* @stop_hw: stops the HW- from that point on, the HW will be in low power but
* will still issue interrupt if the HW RF kill is triggered.
* @start_device: allocates and inits all the resources for the transport
* layer.
* @fw_alive: called when the fw sends alive notification
@ -163,6 +165,7 @@ struct iwl_host_cmd {
struct iwl_trans_ops {
int (*start_hw)(struct iwl_trans *iwl_trans);
void (*stop_hw)(struct iwl_trans *iwl_trans);
int (*start_device)(struct iwl_trans *trans);
void (*fw_alive)(struct iwl_trans *trans);
void (*stop_device)(struct iwl_trans *trans);
@ -271,6 +274,11 @@ static inline int iwl_trans_start_hw(struct iwl_trans *trans)
return trans->ops->start_hw(trans);
}
static inline void iwl_trans_stop_hw(struct iwl_trans *trans)
{
trans->ops->stop_hw(trans);
}
static inline void iwl_trans_fw_alive(struct iwl_trans *trans)
{
trans->ops->fw_alive(trans);