--- /dev/null
+From patchwork Sat Sep 17 20:27:41 2022
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 8bit
+X-Patchwork-Submitter: Daniel Golle <daniel@makrotopia.org>
+X-Patchwork-Id: 12979247
+X-Patchwork-Delegate: kvalo@adurom.com
+Return-Path: <linux-wireless-owner@kernel.org>
+Date: Sat, 17 Sep 2022 21:27:41 +0100
+From: Daniel Golle <daniel@makrotopia.org>
+To: linux-wireless@vger.kernel.org, Stanislaw Gruszka <stf_xl@wp.pl>,
+ Helmut Schaa <helmut.schaa@googlemail.com>
+Cc: Kalle Valo <kvalo@kernel.org>,
+ "David S. Miller" <davem@davemloft.net>,
+ Eric Dumazet <edumazet@google.com>,
+ Jakub Kicinski <kuba@kernel.org>,
+ Paolo Abeni <pabeni@redhat.com>,
+ Johannes Berg <johannes.berg@intel.com>
+Subject: [PATCH v3 06/16] rt2x00: add r calibration for MT7620
+Message-ID:
+ <e0c34f233089bec4eb73826bc4f512166ee25934.1663445157.git.daniel@makrotopia.org>
+References: <cover.1663445157.git.daniel@makrotopia.org>
+MIME-Version: 1.0
+Content-Disposition: inline
+In-Reply-To: <cover.1663445157.git.daniel@makrotopia.org>
+Precedence: bulk
+List-ID: <linux-wireless.vger.kernel.org>
+X-Mailing-List: linux-wireless@vger.kernel.org
+
+From: Tomislav Požega <pozega.tomislav@gmail.com>
+
+Add r calibration code as found in 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>
+---
+v2: use rt2800_wait_bbp_rf_ready()
+
+ drivers/net/wireless/ralink/rt2x00/rt2800.h | 2 +
+ .../net/wireless/ralink/rt2x00/rt2800lib.c | 133 ++++++++++++++++++
+ 2 files changed, 135 insertions(+)
+
+--- a/drivers/net/wireless/ralink/rt2x00/rt2800.h
++++ b/drivers/net/wireless/ralink/rt2x00/rt2800.h
+@@ -1016,6 +1016,8 @@
+ */
+ #define MAC_STATUS_CFG 0x1200
+ #define MAC_STATUS_CFG_BBP_RF_BUSY FIELD32(0x00000003)
++#define MAC_STATUS_CFG_BBP_RF_BUSY_TX FIELD32(0x00000001)
++#define MAC_STATUS_CFG_BBP_RF_BUSY_RX FIELD32(0x00000002)
+
+ /*
+ * PWR_PIN_CFG:
+--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
++++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
+@@ -8475,6 +8475,138 @@ static void rt2800_rf_self_txdc_cal(stru
+ rt2800_register_write(rt2x00dev, RF_BYPASS2, mac052c);
+ }
+
++static int rt2800_calcrcalibrationcode(struct rt2x00_dev *rt2x00dev, int d1, int d2)
++{
++ int calcode = ((d2 - d1) * 1000) / 43;
++
++ if ((calcode % 10) >= 5)
++ calcode += 10;
++ calcode = (calcode / 10);
++
++ return calcode;
++}
++
++static void rt2800_r_calibration(struct rt2x00_dev *rt2x00dev)
++{
++ u32 savemacsysctrl;
++ u8 saverfb0r1, saverfb0r34, saverfb0r35;
++ u8 saverfb5r4, saverfb5r17, saverfb5r18;
++ u8 saverfb5r19, saverfb5r20;
++ u8 savebbpr22, savebbpr47, savebbpr49;
++ u8 bytevalue = 0;
++ int rcalcode;
++ u8 r_cal_code = 0;
++ char d1 = 0, d2 = 0;
++ u8 rfvalue;
++ u32 MAC_RF_BYPASS0, MAC_RF_CONTROL0, MAC_PWR_PIN_CFG;
++ u32 maccfg;
++
++ saverfb0r1 = rt2800_rfcsr_read_bank(rt2x00dev, 0, 1);
++ saverfb0r34 = rt2800_rfcsr_read_bank(rt2x00dev, 0, 34);
++ saverfb0r35 = rt2800_rfcsr_read_bank(rt2x00dev, 0, 35);
++ saverfb5r4 = rt2800_rfcsr_read_bank(rt2x00dev, 5, 4);
++ saverfb5r17 = rt2800_rfcsr_read_bank(rt2x00dev, 5, 17);
++ saverfb5r18 = rt2800_rfcsr_read_bank(rt2x00dev, 5, 18);
++ saverfb5r19 = rt2800_rfcsr_read_bank(rt2x00dev, 5, 19);
++ saverfb5r20 = rt2800_rfcsr_read_bank(rt2x00dev, 5, 20);
++
++ savebbpr22 = rt2800_bbp_read(rt2x00dev, 22);
++ savebbpr47 = rt2800_bbp_read(rt2x00dev, 47);
++ savebbpr49 = rt2800_bbp_read(rt2x00dev, 49);
++
++ savemacsysctrl = rt2800_register_read(rt2x00dev, MAC_SYS_CTRL);
++ MAC_RF_BYPASS0 = rt2800_register_read(rt2x00dev, RF_BYPASS0);
++ MAC_RF_CONTROL0 = rt2800_register_read(rt2x00dev, RF_CONTROL0);
++ MAC_PWR_PIN_CFG = rt2800_register_read(rt2x00dev, PWR_PIN_CFG);
++
++ maccfg = rt2800_register_read(rt2x00dev, MAC_SYS_CTRL);
++ maccfg &= (~0x04);
++ rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, maccfg);
++
++ if (unlikely(rt2800_wait_bbp_rf_ready(rt2x00dev, MAC_STATUS_CFG_BBP_RF_BUSY_TX)))
++ rt2x00_warn(rt2x00dev, "Wait MAC Tx Status to MAX !!!\n");
++
++ maccfg = rt2800_register_read(rt2x00dev, MAC_SYS_CTRL);
++ maccfg &= (~0x04);
++ rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, maccfg);
++
++ if (unlikely(rt2800_wait_bbp_rf_ready(rt2x00dev, MAC_STATUS_CFG_BBP_RF_BUSY_RX)))
++ rt2x00_warn(rt2x00dev, "Wait MAC Rx Status to MAX !!!\n");
++
++ rfvalue = (MAC_RF_BYPASS0 | 0x3004);
++ rt2800_register_write(rt2x00dev, RF_BYPASS0, rfvalue);
++ rfvalue = (MAC_RF_CONTROL0 | (~0x3002));
++ rt2800_register_write(rt2x00dev, RF_CONTROL0, rfvalue);
++
++ rt2800_rfcsr_write_bank(rt2x00dev, 5, 4, 0x27);
++ rt2800_rfcsr_write_bank(rt2x00dev, 5, 17, 0x80);
++ rt2800_rfcsr_write_bank(rt2x00dev, 5, 18, 0x83);
++ rt2800_rfcsr_write_bank(rt2x00dev, 5, 19, 0x00);
++ rt2800_rfcsr_write_bank(rt2x00dev, 5, 20, 0x20);
++
++ rt2800_rfcsr_write_bank(rt2x00dev, 0, 1, 0x00);
++ rt2800_rfcsr_write_bank(rt2x00dev, 0, 34, 0x13);
++ rt2800_rfcsr_write_bank(rt2x00dev, 0, 35, 0x00);
++
++ rt2800_register_write(rt2x00dev, PWR_PIN_CFG, 0x1);
++
++ rt2800_bbp_write(rt2x00dev, 47, 0x04);
++ rt2800_bbp_write(rt2x00dev, 22, 0x80);
++ usleep_range(100, 200);
++ bytevalue = rt2800_bbp_read(rt2x00dev, 49);
++ if (bytevalue > 128)
++ d1 = bytevalue - 256;
++ else
++ d1 = (char)bytevalue;
++ rt2800_bbp_write(rt2x00dev, 22, 0x0);
++ rt2800_rfcsr_write_bank(rt2x00dev, 0, 35, 0x01);
++
++ rt2800_bbp_write(rt2x00dev, 22, 0x80);
++ usleep_range(100, 200);
++ bytevalue = rt2800_bbp_read(rt2x00dev, 49);
++ if (bytevalue > 128)
++ d2 = bytevalue - 256;
++ else
++ d2 = (char)bytevalue;
++ rt2800_bbp_write(rt2x00dev, 22, 0x0);
++
++ rcalcode = rt2800_calcrcalibrationcode(rt2x00dev, d1, d2);
++ if (rcalcode < 0)
++ r_cal_code = 256 + rcalcode;
++ else
++ r_cal_code = (u8)rcalcode;
++
++ rt2800_rfcsr_write_bank(rt2x00dev, 0, 7, r_cal_code);
++
++ rt2800_bbp_write(rt2x00dev, 22, 0x0);
++
++ bytevalue = rt2800_bbp_read(rt2x00dev, 21);
++ bytevalue |= 0x1;
++ rt2800_bbp_write(rt2x00dev, 21, bytevalue);
++ bytevalue = rt2800_bbp_read(rt2x00dev, 21);
++ bytevalue &= (~0x1);
++ rt2800_bbp_write(rt2x00dev, 21, bytevalue);
++
++ rt2800_rfcsr_write_bank(rt2x00dev, 0, 1, saverfb0r1);
++ rt2800_rfcsr_write_bank(rt2x00dev, 0, 34, saverfb0r34);
++ rt2800_rfcsr_write_bank(rt2x00dev, 0, 35, saverfb0r35);
++ rt2800_rfcsr_write_bank(rt2x00dev, 5, 4, saverfb5r4);
++ rt2800_rfcsr_write_bank(rt2x00dev, 5, 17, saverfb5r17);
++ rt2800_rfcsr_write_bank(rt2x00dev, 5, 18, saverfb5r18);
++ rt2800_rfcsr_write_bank(rt2x00dev, 5, 19, saverfb5r19);
++ rt2800_rfcsr_write_bank(rt2x00dev, 5, 20, saverfb5r20);
++
++ rt2800_bbp_write(rt2x00dev, 22, savebbpr22);
++ rt2800_bbp_write(rt2x00dev, 47, savebbpr47);
++ rt2800_bbp_write(rt2x00dev, 49, savebbpr49);
++
++ rt2800_register_write(rt2x00dev, RF_BYPASS0, MAC_RF_BYPASS0);
++ rt2800_register_write(rt2x00dev, RF_CONTROL0, MAC_RF_CONTROL0);
++
++ rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, savemacsysctrl);
++ rt2800_register_write(rt2x00dev, PWR_PIN_CFG, MAC_PWR_PIN_CFG);
++}
++
+ static void rt2800_bbp_core_soft_reset(struct rt2x00_dev *rt2x00dev,
+ bool set_bw, bool is_ht40)
+ {
+@@ -9082,6 +9214,7 @@ static void rt2800_init_rfcsr_6352(struc
+ rt2800_rfcsr_write_dccal(rt2x00dev, 5, 0x00);
+ rt2800_rfcsr_write_dccal(rt2x00dev, 17, 0x7C);
+
++ rt2800_r_calibration(rt2x00dev);
+ rt2800_rf_self_txdc_cal(rt2x00dev);
+ rt2800_bw_filter_calibration(rt2x00dev, true);
+ rt2800_bw_filter_calibration(rt2x00dev, false);
projects / openwrt / openwrt.git / blobdiff