The I/Q swapping is extremely important and should be dealt with extra care.
It will affects OFDM and CCK differently.
For 6000/6005/6030 series devices, the I/Q were swapped, and for 2000 series
devices, it is in non-swapped status (but its swapped with respected to 6000/6005/6030).
so the CSR_GP_DRIVER_REG_BIT_RADIO_IQ_INVER register need to be set to support
the correct behavior.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@xxxxxxxxx>
---
drivers/net/wireless/iwlwifi/iwl-2000.c | 10 ++++++++--
drivers/net/wireless/iwlwifi/iwl-core.h | 2 ++
drivers/net/wireless/iwlwifi/iwl-csr.h | 2 ++
3 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/iwlwifi/iwl-2000.c b/drivers/net/wireless/iwlwifi/iwl-2000.c
index 3c9e1b5..ac5996f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-2000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-2000.c
@@ -97,6 +97,10 @@ static void iwl2000_nic_config(struct iwl_priv *priv)
CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
+ if (priv->cfg->iq_invert)
+ iwl_set_bit(priv, CSR_GP_DRIVER_REG,
+ CSR_GP_DRIVER_REG_BIT_RADIO_IQ_INVER);
+
}
static struct iwl_sensitivity_ranges iwl2000_sensitivity = {
@@ -428,7 +432,8 @@ static struct iwl_bt_params iwl2030_bt_params = {
.base_params = &iwl2000_base_params, \
.need_dc_calib = true, \
.need_temp_offset_calib = true, \
- .led_mode = IWL_LED_RF_STATE \
+ .led_mode = IWL_LED_RF_STATE, \
+ .iq_invert = true \
struct iwl_cfg iwl2000_2bgn_cfg = {
.name = "2000 Series 2x2 BGN",
@@ -454,7 +459,8 @@ struct iwl_cfg iwl2000_2bg_cfg = {
.need_dc_calib = true, \
.need_temp_offset_calib = true, \
.led_mode = IWL_LED_RF_STATE, \
- .adv_pm = true \
+ .adv_pm = true, \
+ .iq_invert = true \
struct iwl_cfg iwl2030_2bgn_cfg = {
.name = "2000 Series 2x2 BGN/BT",
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index c83fcc6..b57e739 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -364,6 +364,7 @@ struct iwl_ht_params {
* @adv_pm: advance power management
* @rx_with_siso_diversity: 1x1 device with rx antenna diversity
* @internal_wimax_coex: internal wifi/wimax combo device
+ * @iq_invert: I/Q inversion
*
* We enable the driver to be backward compatible wrt API version. The
* driver specifies which APIs it supports (with @ucode_api_max being the
@@ -413,6 +414,7 @@ struct iwl_cfg {
const bool adv_pm;
const bool rx_with_siso_diversity;
const bool internal_wimax_coex;
+ const bool iq_invert;
};
/***************************
diff --git a/drivers/net/wireless/iwlwifi/iwl-csr.h b/drivers/net/wireless/iwlwifi/iwl-csr.h
index 6c2b2df..f52bc04 100644
--- a/drivers/net/wireless/iwlwifi/iwl-csr.h
+++ b/drivers/net/wireless/iwlwifi/iwl-csr.h
@@ -382,6 +382,8 @@
#define CSR_GP_DRIVER_REG_BIT_CALIB_VERSION6 (0x00000004)
#define CSR_GP_DRIVER_REG_BIT_6050_1x2 (0x00000008)
+#define CSR_GP_DRIVER_REG_BIT_RADIO_IQ_INVER (0x00000080)
+
/* GIO Chicken Bits (PCI Express bus link power management) */
#define CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX (0x00800000)
#define CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER (0x20000000)
--
1.7.0.4
--
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