diff options
| author | Eran Harary <eran.harary@intel.com> | 2015-02-25 15:24:51 +0300 |
|---|---|---|
| committer | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2015-03-12 10:57:35 +0300 |
| commit | 7a42baa621538eb73b261828027b1faa25e341e6 (patch) | |
| tree | 45a47676b4294b2e8c5a211b72b85b2fec8c3db7 /drivers/net/wireless/iwlwifi/pcie/trans.c | |
| parent | 7754ae79e218bfd7782655fdebc8966c8a858358 (diff) | |
| download | linux-7a42baa621538eb73b261828027b1faa25e341e6.tar.xz | |
iwlwifi: mvm: support family 8000 B2/C steps
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 <eran.harary@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/pcie/trans.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/pcie/trans.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/drivers/net/wireless/iwlwifi/pcie/trans.c b/drivers/net/wireless/iwlwifi/pcie/trans.c index f31a94160771..4c16333b21f7 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); |