iwlwifi: use antenna information in EEPROM
The valid tx/rx antenna information is part of EEPROM, so use it
to configure the device.
For few cases, the EEPROM did not reflect the correct antenna, but
it is too late to modify the EEPROM, so overwrite with .cfg parameters
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c b/drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c
index 8a4d3ac..dbada76 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c
@@ -251,6 +251,7 @@
int iwl_eeprom_check_sku(struct iwl_priv *priv)
{
u16 eeprom_sku;
+ u16 radio_cfg;
eeprom_sku = iwl_eeprom_query16(priv, EEPROM_SKU_CAP);
@@ -266,6 +267,25 @@
IWL_INFO(priv, "Device SKU: 0X%x\n", priv->cfg->sku);
+ if (!priv->cfg->valid_tx_ant && !priv->cfg->valid_rx_ant) {
+ /* not using .cfg overwrite */
+ radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
+ priv->cfg->valid_tx_ant = EEPROM_RF_CFG_TX_ANT_MSK(radio_cfg);
+ priv->cfg->valid_rx_ant = EEPROM_RF_CFG_TX_ANT_MSK(radio_cfg);
+ if (!priv->cfg->valid_tx_ant || !priv->cfg->valid_rx_ant) {
+ IWL_ERR(priv, "Invalid chain (0X%x, 0X%x)\n",
+ priv->cfg->valid_tx_ant,
+ priv->cfg->valid_rx_ant);
+ return -EINVAL;
+ }
+ IWL_INFO(priv, "Valid Tx ant: 0X%x, Valid Rx ant: 0X%x\n",
+ priv->cfg->valid_tx_ant, priv->cfg->valid_rx_ant);
+ }
+ /*
+ * for some special cases,
+ * EEPROM did not reflect the correct antenna setting
+ * so overwrite the valid tx/rx antenna from .cfg
+ */
return 0;
}