From: Tomislav Požega <pozega.tomislav@xxxxxxxxx>
Add RXDCOC calibration code from mtk driver.
Signed-off-by: Tomislav Požega <pozega.tomislav@xxxxxxxxx>
[fixed typo reported by Serge Vasilugin <vasilugin@xxxxxxxxx>]
Signed-off-by: Daniel Golle <daniel@xxxxxxxxxxxxxx>
Acked-by: Stanislaw Gruszka <stf_xl@xxxxx>
---
.../net/wireless/ralink/rt2x00/rt2800lib.c | 60 +++++++++++++++++++
1 file changed, 60 insertions(+)
diff --git a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
index df5038a59046fe..a785e6616c748a 100644
--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
@@ -8607,6 +8607,65 @@ static void rt2800_r_calibration(struct rt2x00_dev *rt2x00dev)
rt2800_register_write(rt2x00dev, PWR_PIN_CFG, MAC_PWR_PIN_CFG);
}
+static void rt2800_rxdcoc_calibration(struct rt2x00_dev *rt2x00dev)
+{
+ u8 bbpreg = 0;
+ u32 macvalue = 0;
+ u8 saverfb0r2, saverfb5r4, saverfb7r4, rfvalue;
+ int i;
+
+ saverfb0r2 = rt2800_rfcsr_read_bank(rt2x00dev, 0, 2);
+ rfvalue = saverfb0r2;
+ rfvalue |= 0x03;
+ rt2800_rfcsr_write_bank(rt2x00dev, 0, 2, rfvalue);
+
+ rt2800_bbp_write(rt2x00dev, 158, 141);
+ bbpreg = rt2800_bbp_read(rt2x00dev, 159);
+ bbpreg |= 0x10;
+ rt2800_bbp_write(rt2x00dev, 159, bbpreg);
+
+ macvalue = rt2800_register_read(rt2x00dev, MAC_SYS_CTRL);
+ rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, 0x8);
+
+ if (unlikely(rt2800_wait_bbp_rf_ready(rt2x00dev, MAC_STATUS_CFG_BBP_RF_BUSY_TX)))
+ rt2x00_warn(rt2x00dev, "RF TX busy in RX RXDCOC calibration\n");
+
+ saverfb5r4 = rt2800_rfcsr_read_bank(rt2x00dev, 5, 4);
+ saverfb7r4 = rt2800_rfcsr_read_bank(rt2x00dev, 7, 4);
+ saverfb5r4 = saverfb5r4 & (~0x40);
+ saverfb7r4 = saverfb7r4 & (~0x40);
+ rt2800_rfcsr_write_dccal(rt2x00dev, 4, 0x64);
+ rt2800_rfcsr_write_bank(rt2x00dev, 5, 4, saverfb5r4);
+ rt2800_rfcsr_write_bank(rt2x00dev, 7, 4, saverfb7r4);
+
+ rt2800_bbp_write(rt2x00dev, 158, 141);
+ bbpreg = rt2800_bbp_read(rt2x00dev, 159);
+ bbpreg = bbpreg & (~0x40);
+ rt2800_bbp_write(rt2x00dev, 159, bbpreg);
+ bbpreg |= 0x48;
+ rt2800_bbp_write(rt2x00dev, 159, bbpreg);
+
+ for (i = 0; i < 10000; i++) {
+ bbpreg = rt2800_bbp_read(rt2x00dev, 159);
+ if ((bbpreg & 0x40) == 0)
+ break;
+ usleep_range(50, 100);
+ }
+
+ bbpreg = rt2800_bbp_read(rt2x00dev, 159);
+ bbpreg = bbpreg & (~0x40);
+ rt2800_bbp_write(rt2x00dev, 159, bbpreg);
+
+ rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, macvalue);
+
+ rt2800_bbp_write(rt2x00dev, 158, 141);
+ bbpreg = rt2800_bbp_read(rt2x00dev, 159);
+ bbpreg &= (~0x10);
+ rt2800_bbp_write(rt2x00dev, 159, bbpreg);
+
+ rt2800_rfcsr_write_bank(rt2x00dev, 0, 2, saverfb0r2);
+}
+
static void rt2800_bbp_core_soft_reset(struct rt2x00_dev *rt2x00dev,
bool set_bw, bool is_ht40)
{
@@ -9216,6 +9275,7 @@ static void rt2800_init_rfcsr_6352(struct rt2x00_dev *rt2x00dev)
rt2800_r_calibration(rt2x00dev);
rt2800_rf_self_txdc_cal(rt2x00dev);
+ rt2800_rxdcoc_calibration(rt2x00dev);
rt2800_bw_filter_calibration(rt2x00dev, true);
rt2800_bw_filter_calibration(rt2x00dev, false);
}
--
2.37.3
