diff options
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/iwl-prph.h | 7 | ||||
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 12 |
2 files changed, 19 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-prph.h b/drivers/net/wireless/intel/iwlwifi/iwl-prph.h index 0f51c7bea8d0..2084c63dc670 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-prph.h +++ b/drivers/net/wireless/intel/iwlwifi/iwl-prph.h @@ -8,6 +8,7 @@ * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved. * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH * Copyright(c) 2016 Intel Deutschland GmbH + * Copyright (C) 2018 Intel Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as @@ -30,6 +31,7 @@ * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved. * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH * Copyright(c) 2016 Intel Deutschland GmbH + * Copyright (C) 2018 Intel Corporation * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -394,6 +396,7 @@ enum aux_misc_master1_en { #define AUX_MISC_MASTER1_SMPHR_STATUS 0xA20800 #define RSA_ENABLE 0xA24B08 #define PREG_AUX_BUS_WPROT_0 0xA04CC0 +#define PREG_PRPH_WPROT_0 0xA04CE0 #define SB_CPU_1_STATUS 0xA01E30 #define SB_CPU_2_STATUS 0xA01E34 #define UMAG_SB_CPU_1_STATUS 0xA038C0 @@ -420,4 +423,8 @@ enum { #define UREG_CHICK (0xA05C00) #define UREG_CHICK_MSI_ENABLE BIT(24) #define UREG_CHICK_MSIX_ENABLE BIT(25) + +#define HPM_DEBUG 0xA03440 +#define PERSISTENCE_BIT BIT(12) +#define PREG_WFPM_ACCESS BIT(12) #endif /* __iwl_prph_h__ */ diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c index 5bafb3f46eb8..890b51b223a1 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c @@ -1729,6 +1729,7 @@ static int iwl_pcie_init_msix_handler(struct pci_dev *pdev, static int _iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); + u32 hpm; int err; lockdep_assert_held(&trans_pcie->mutex); @@ -1739,6 +1740,17 @@ static int _iwl_trans_pcie_start_hw(struct iwl_trans *trans, bool low_power) return err; } + hpm = iwl_trans_read_prph(trans, HPM_DEBUG); + if (hpm != 0xa5a5a5a0 && (hpm & PERSISTENCE_BIT)) { + if (iwl_trans_read_prph(trans, PREG_PRPH_WPROT_0) & + PREG_WFPM_ACCESS) { + IWL_ERR(trans, + "Error, can not clear persistence bit\n"); + return -EPERM; + } + iwl_trans_write_prph(trans, HPM_DEBUG, hpm & ~PERSISTENCE_BIT); + } + iwl_trans_pcie_sw_reset(trans); err = iwl_pcie_apm_init(trans); |