iwlwifi: pcie: let the Manageability Engine know when we leave

When the driver is unload, the Manageability Engine should
know about that - send an event to inform it about this
event.

Reviewed-by: Reuven Borok <reuven.borok@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/iwl-csr.h b/drivers/net/wireless/iwlwifi/iwl-csr.h
index aff63c3..7f40cf3 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-csr.h
+++ b/drivers/net/wireless/iwlwifi/iwl-csr.h
@@ -184,6 +184,7 @@
 #define CSR_HW_IF_CONFIG_REG_BIT_NIC_READY     (0x00400000) /* PCI_OWN_SEM */
 #define CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE (0x02000000) /* ME_OWN */
 #define CSR_HW_IF_CONFIG_REG_PREPARE             (0x08000000) /* WAKE_ME */
+#define CSR_HW_IF_CONFIG_REG_ENABLE_PME                  (0x10000000)
 #define CSR_HW_IF_CONFIG_REG_PERSIST_MODE        (0x40000000) /* PERSISTENCE */
 
 #define CSR_MBOX_SET_REG_OS_ALIVE              BIT(5)

diff --git a/drivers/net/wireless/iwlwifi/iwl-prph.h b/drivers/net/wireless/iwlwifi/iwl-prph.h
index 2df51ea..ea3b970 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-prph.h
+++ b/drivers/net/wireless/iwlwifi/iwl-prph.h
@@ -99,6 +99,7 @@
 
 #define APMG_PCIDEV_STT_VAL_PERSIST_DIS        (0x00000200)
 #define APMG_PCIDEV_STT_VAL_L1_ACT_DIS (0x00000800)
+#define APMG_PCIDEV_STT_VAL_WAKE_ME    (0x00004000)
 
 #define APMG_RTC_INT_STT_RFKILL                (0x10000000)
 

diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c
index 5d79a1f..4b42de3 100644 (file)
--- a/drivers/net/wireless/iwlwifi/pcie/trans.c
+++ b/drivers/net/wireless/iwlwifi/pcie/trans.c
@@ -443,10 +443,25 @@ static int iwl_pcie_apm_stop_master(struct iwl_trans *trans)
        return ret;
 }
 
-static void iwl_pcie_apm_stop(struct iwl_trans *trans)
+static void iwl_pcie_apm_stop(struct iwl_trans *trans, bool op_mode_leave)
 {
        IWL_DEBUG_INFO(trans, "Stop card, put in low power state\n");
 
+       if (op_mode_leave) {
+               if (!test_bit(STATUS_DEVICE_ENABLED, &trans->status))
+                       iwl_pcie_apm_init(trans);
+
+               /* inform ME that we are leaving */
+               if (trans->cfg->device_family == IWL_DEVICE_FAMILY_7000)
+                       iwl_set_bits_prph(trans, APMG_PCIDEV_STT_REG,
+                                         APMG_PCIDEV_STT_VAL_WAKE_ME);
+               else if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
+                       iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
+                                   CSR_HW_IF_CONFIG_REG_PREPARE |
+                                   CSR_HW_IF_CONFIG_REG_ENABLE_PME);
+               mdelay(5);
+       }
+
        clear_bit(STATUS_DEVICE_ENABLED, &trans->status);
 
        /* Stop device's DMA activity */
@@ -1010,7 +1025,7 @@ 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_pcie_apm_stop(trans);
+       iwl_pcie_apm_stop(trans, false);
 
        /* Upon stop, the APM issues an interrupt if HW RF kill is set.
         * Clean again the interrupt here
@@ -1187,7 +1202,7 @@ static void iwl_trans_pcie_op_mode_leave(struct iwl_trans *trans)
        iwl_disable_interrupts(trans);
        spin_unlock(&trans_pcie->irq_lock);
 
-       iwl_pcie_apm_stop(trans);
+       iwl_pcie_apm_stop(trans, true);
 
        spin_lock(&trans_pcie->irq_lock);
        iwl_disable_interrupts(trans);