From: Sara Sharon <[email protected]> This register is helpful for debugging D3 issues. Driver turns all bits on, and then on exit reads the updated value there.
Signed-off-by: Sara Sharon <[email protected]> Signed-off-by: Luca Coelho <[email protected]> --- drivers/net/wireless/intel/iwlwifi/iwl-prph.h | 1 + drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 13 +++++++++++++ 2 files changed, 14 insertions(+) diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-prph.h b/drivers/net/wireless/intel/iwlwifi/iwl-prph.h index 406ef301b8ab..3a8aeee3b55a 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-prph.h +++ b/drivers/net/wireless/intel/iwlwifi/iwl-prph.h @@ -378,6 +378,7 @@ #define RADIO_REG_SYS_MANUAL_DFT_0 0xAD4078 #define RFIC_REG_RD 0xAD0470 #define WFPM_CTRL_REG 0xA03030 +#define WFPM_GP2 0xA030B4 enum { ENABLE_WFPM = BIT(31), WFPM_AUX_CTL_AUX_IF_MAC_OWNER_MSK = 0x80000000, diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c index 69f1b032260c..15bf5100d096 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/trans.c @@ -1047,6 +1047,16 @@ static int iwl_pcie_load_given_ucode_8000(struct iwl_trans *trans, if (ret) return ret; + IWL_DEBUG_POWER(trans, "Original WFPM value = 0x%08X\n", + iwl_read_prph(trans, WFPM_GP2)); + + /* + * Set default value. On resume reading the values that were + * zeored can provide debug data on the resume flow. + * This is for debugging only and has no functional impact. + */ + iwl_write_prph(trans, WFPM_GP2, 0x01010101); + /* configure the ucode to be ready to get the secured image */ /* release CPU reset */ iwl_write_prph(trans, RELEASE_CPU_RESET, RELEASE_CPU_RESET_BIT); @@ -1527,6 +1537,9 @@ static int iwl_trans_pcie_d3_resume(struct iwl_trans *trans, } } + IWL_DEBUG_POWER(trans, "WFPM value upon resume = 0x%08X\n", + iwl_read_prph(trans, WFPM_GP2)); + val = iwl_read32(trans, CSR_RESET); if (val & CSR_RESET_REG_FLAG_NEVO_RESET) *status = IWL_D3_STATUS_RESET; -- 2.11.0
