wifi: rt2x00: add RF self TXDC calibration for MT7620

Add TX self calibration based on mtk driver.

Signed-off-by: Tomislav Požega <pozega.tomislav@gmail.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Acked-by: Stanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/dbb6e5a0c12d6101477bd09e83253091d21512c9.1663445157.git.daniel@makrotopia.org

diff --git a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
index cf5463cb7b642ba52679da738adec07e20fdc8ee..ed2c6105899b8dd4b0a4c7ded8e3043301fab60a 100644 (file)
--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
@@ -8428,6 +8428,53 @@ static void rt2800_init_rfcsr_5592(struct rt2x00_dev *rt2x00dev)
        rt2800_led_open_drain_enable(rt2x00dev);
 }
 
+static void rt2800_rf_self_txdc_cal(struct rt2x00_dev *rt2x00dev)
+{
+       u8 rfb5r1_org, rfb7r1_org, rfvalue;
+       u32 mac0518, mac051c, mac0528, mac052c;
+       u8 i;
+
+       mac0518 = rt2800_register_read(rt2x00dev, RF_CONTROL0);
+       mac051c = rt2800_register_read(rt2x00dev, RF_BYPASS0);
+       mac0528 = rt2800_register_read(rt2x00dev, RF_CONTROL2);
+       mac052c = rt2800_register_read(rt2x00dev, RF_BYPASS2);
+
+       rt2800_register_write(rt2x00dev, RF_BYPASS0, 0x0);
+       rt2800_register_write(rt2x00dev, RF_BYPASS2, 0x0);
+
+       rt2800_register_write(rt2x00dev, RF_CONTROL0, 0xC);
+       rt2800_register_write(rt2x00dev, RF_BYPASS0, 0x3306);
+       rt2800_register_write(rt2x00dev, RF_CONTROL2, 0x3330);
+       rt2800_register_write(rt2x00dev, RF_BYPASS2, 0xfffff);
+       rfb5r1_org = rt2800_rfcsr_read_bank(rt2x00dev, 5, 1);
+       rfb7r1_org = rt2800_rfcsr_read_bank(rt2x00dev, 7, 1);
+
+       rt2800_rfcsr_write_bank(rt2x00dev, 5, 1, 0x4);
+       for (i = 0; i < 100; ++i) {
+               usleep_range(50, 100);
+               rfvalue = rt2800_rfcsr_read_bank(rt2x00dev, 5, 1);
+               if ((rfvalue & 0x04) != 0x4)
+                       break;
+       }
+       rt2800_rfcsr_write_bank(rt2x00dev, 5, 1, rfb5r1_org);
+
+       rt2800_rfcsr_write_bank(rt2x00dev, 7, 1, 0x4);
+       for (i = 0; i < 100; ++i) {
+               usleep_range(50, 100);
+               rfvalue = rt2800_rfcsr_read_bank(rt2x00dev, 7, 1);
+               if ((rfvalue & 0x04) != 0x4)
+                       break;
+       }
+       rt2800_rfcsr_write_bank(rt2x00dev, 7, 1, rfb7r1_org);
+
+       rt2800_register_write(rt2x00dev, RF_BYPASS0, 0x0);
+       rt2800_register_write(rt2x00dev, RF_BYPASS2, 0x0);
+       rt2800_register_write(rt2x00dev, RF_CONTROL0, mac0518);
+       rt2800_register_write(rt2x00dev, RF_BYPASS0, mac051c);
+       rt2800_register_write(rt2x00dev, RF_CONTROL2, mac0528);
+       rt2800_register_write(rt2x00dev, RF_BYPASS2, mac052c);
+}
+
 static void rt2800_bbp_core_soft_reset(struct rt2x00_dev *rt2x00dev,
                                       bool set_bw, bool is_ht40)
 {
@@ -9035,6 +9082,7 @@ static void rt2800_init_rfcsr_6352(struct rt2x00_dev *rt2x00dev)
        rt2800_rfcsr_write_dccal(rt2x00dev, 5, 0x00);
        rt2800_rfcsr_write_dccal(rt2x00dev, 17, 0x7C);
 
+       rt2800_rf_self_txdc_cal(rt2x00dev);
        rt2800_bw_filter_calibration(rt2x00dev, true);
        rt2800_bw_filter_calibration(rt2x00dev, false);
 }