From: Eran Harary <[email protected]> In-order to recognize newer step of the device, the driver must read the chip_version_id from the AUX bus MISC address space. This will determine what firmware file will be loaded.
Signed-off-by: Eran Harary <[email protected]> Signed-off-by: Emmanuel Grumbach <[email protected]> --- drivers/net/wireless/iwlwifi/iwl-prph.h | 9 ++++++++ drivers/net/wireless/iwlwifi/pcie/trans.c | 37 ++++++++++++++++++++++++++++++- 2 files changed, 45 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/iwlwifi/iwl-prph.h b/drivers/net/wireless/iwlwifi/iwl-prph.h index 383af27..aa6fb584 100644 --- a/drivers/net/wireless/iwlwifi/iwl-prph.h +++ b/drivers/net/wireless/iwlwifi/iwl-prph.h @@ -378,6 +378,15 @@ enum secure_load_status_reg { #define LMPM_PMG_EN 0xA01CEC #define RADIO_REG_SYS_MANUAL_DFT_0 0xAD4078 #define RFIC_REG_RD 0xAD0470 +#define WFPM_CTRL_REG 0xA03030 +enum { + ENABLE_WFPM = BIT(31), +}; + +#define AUX_MISC_REG 0xA200B0 +enum { + HW_STEP_LOCATION_BITS = 24, +}; /* FW chicken bits */ #define LMPM_CHICK 0xA01FF8 diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c index f31a941..4c16333 100644 --- a/drivers/net/wireless/iwlwifi/pcie/trans.c +++ b/drivers/net/wireless/iwlwifi/pcie/trans.c @@ -2423,10 +2423,45 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev, * "dash" value). To keep hw_rev backwards compatible - we'll store it * in the old format. */ - if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) + if (trans->cfg->device_family == IWL_DEVICE_FAMILY_8000) { + unsigned long flags; + int ret; + trans->hw_rev = (trans->hw_rev & 0xfff0) | (CSR_HW_REV_STEP(trans->hw_rev << 2) << 2); + /* + * in-order to recognize C step driver should read chip version + * id located at the AUX bus MISC address space. + */ + iwl_set_bit(trans, CSR_GP_CNTRL, + CSR_GP_CNTRL_REG_FLAG_INIT_DONE); + udelay(2); + + ret = iwl_poll_bit(trans, CSR_GP_CNTRL, + CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, + CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, + 25000); + if (ret < 0) { + IWL_DEBUG_INFO(trans, "Failed to wake up the nic\n"); + goto out_pci_disable_msi; + } + + if (iwl_trans_grab_nic_access(trans, false, &flags)) { + u32 hw_step; + + hw_step = __iwl_read_prph(trans, WFPM_CTRL_REG); + hw_step |= ENABLE_WFPM; + __iwl_write_prph(trans, WFPM_CTRL_REG, hw_step); + hw_step = __iwl_read_prph(trans, AUX_MISC_REG); + hw_step = (hw_step >> HW_STEP_LOCATION_BITS) & 0xF; + if (hw_step == 0x3) + trans->hw_rev = (trans->hw_rev & 0xFFFFFFF3) | + (SILICON_C_STEP << 2); + iwl_trans_release_nic_access(trans, &flags); + } + } + trans->hw_id = (pdev->device << 16) + pdev->subsystem_device; snprintf(trans->hw_id_str, sizeof(trans->hw_id_str), "PCI ID: 0x%04X:0x%04X", pdev->device, pdev->subsystem_device); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
