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path: root/drivers/net/wireless/intel/iwlwifi/iwl-io.c
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Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/iwl-io.c')
-rw-r--r--drivers/net/wireless/intel/iwlwifi/iwl-io.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-io.c b/drivers/net/wireless/intel/iwlwifi/iwl-io.c
index d62eb2d9389a..4ea5883f9175 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-io.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-io.c
@@ -488,3 +488,33 @@ int iwl_dump_fh(struct iwl_trans *trans, char **buf)
return 0;
}
+
+int iwl_finish_nic_init(struct iwl_trans *trans)
+{
+ int err;
+
+ /*
+ * Set "initialization complete" bit to move adapter from
+ * D0U* --> D0A* (powered-up active) state.
+ */
+ iwl_set_bit(trans, CSR_GP_CNTRL,
+ BIT(trans->cfg->csr->flag_init_done));
+
+ if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000)
+ udelay(2);
+
+ /*
+ * Wait for clock stabilization; once stabilized, access to
+ * device-internal resources is supported, e.g. iwl_write_prph()
+ * and accesses to uCode SRAM.
+ */
+ err = iwl_poll_bit(trans, CSR_GP_CNTRL,
+ BIT(trans->cfg->csr->flag_mac_clock_ready),
+ BIT(trans->cfg->csr->flag_mac_clock_ready),
+ 25000);
+ if (err < 0)
+ IWL_DEBUG_INFO(trans, "Failed to wake NIC\n");
+
+ return err < 0 ? err : 0;
+}
+IWL_EXPORT_SYMBOL(iwl_finish_nic_init);