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iwlwifi: update trans->hw_rev 8000 hw family format 

The format of the CSR_HW_REV register has changed in 8000
HW family. To keep backwards compatibility, we store the
value of this register as usual in trans->hw_rev, only we
store it in the old format in this variable.

Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Liad Kaufman 2014-06-01 17:21:33 +03:00 committed by Emmanuel Grumbach
parent 6a68a39fcd
commit b513ee7fd6
1 changed files with 10 additions and 0 deletions
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10
drivers/net/wireless/iwlwifi/pcie/trans.c
View File

@ -1993,6 +1993,16 @@ struct iwl_trans *iwl_trans_pcie_alloc(struct pci_dev *pdev,
}
trans->hw_rev = iwl_read32(trans, CSR_HW_REV);
/*
* In the 8000 HW family the format of the 4 bytes of CSR_HW_REV have
* changed, and now the revision step also includes bit 0-1 (no more
* "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)
trans->hw_rev = (trans->hw_rev & 0xfff0) |
((trans->hw_rev << 2) & 0xc);
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);