mac80211: rt2x00: add RF self TXDC calibration

Add TX self calibration based on mtk driver.

Signed-off-by: Tomislav Požega <pozega.tomislav@gmail.com>

diff --git a/package/kernel/mac80211/patches/rt2x00/982-rt2x00-add-rf-self-txdc-calibration.patch b/package/kernel/mac80211/patches/rt2x00/982-rt2x00-add-rf-self-txdc-calibration.patch
new file mode 100644 (file)
index 0000000..f5874f8
--- /dev/null
+++ b/package/kernel/mac80211/patches/rt2x00/982-rt2x00-add-rf-self-txdc-calibration.patch
@@ -0,0 +1,89 @@
+--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
++++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
+@@ -7652,6 +7652,58 @@ static void rt2800_init_rfcsr_5592(struc
+       rt2800_led_open_drain_enable(rt2x00dev);
+ }
+ 
++void rt2800_rf_self_txdc_cal(struct rt2x00_dev *rt2x00dev)
++{
++      u8 rfb5r1_org, rfb7r1_org, rfvalue;
++      u32 mac0518, mac051c, mac0528, mac052c;
++      u8 i;
++
++      rt2x00_info(rt2x00dev, "RF Tx self calibration start\n");
++      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 = i + 1) {
++              udelay(50);
++              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 = i + 1) {
++              udelay(50);
++              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);
++
++      rt2x00_info(rt2x00dev, "RF Tx self calibration end\n");
++
++}
++EXPORT_SYMBOL_GPL(rt2800_rf_self_txdc_cal);
++
+ static void rt2800_bbp_core_soft_reset(struct rt2x00_dev *rt2x00dev,
+                                      bool set_bw, bool is_ht40)
+ {
+@@ -8259,6 +8311,7 @@ static void rt2800_init_rfcsr_6352(struc
+       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);
+ }
+--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.h
++++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.h
+@@ -227,6 +227,7 @@ void rt2800_link_tuner(struct rt2x00_dev
+                      const u32 count);
+ void rt2800_gain_calibration(struct rt2x00_dev *rt2x00dev);
+ void rt2800_vco_calibration(struct rt2x00_dev *rt2x00dev);
++void rt2800_rf_self_txdc_cal(struct rt2x00_dev *rt2x00dev);
+ 
+ int rt2800_enable_radio(struct rt2x00_dev *rt2x00dev);
+ void rt2800_disable_radio(struct rt2x00_dev *rt2x00dev);
+--- a/drivers/net/wireless/ralink/rt2x00/rt2x00.h
++++ b/drivers/net/wireless/ralink/rt2x00/rt2x00.h
+@@ -570,6 +570,7 @@ struct rt2x00lib_ops {
+                           struct link_qual *qual, const u32 count);
+       void (*gain_calibration) (struct rt2x00_dev *rt2x00dev);
+       void (*vco_calibration) (struct rt2x00_dev *rt2x00dev);
++      void (*rf_self_txdc_cal) (struct rt2x00_dev *rt2x00dev);
+ 
+       /*
+        * Data queue handlers.