+++ /dev/null
-From patchwork Sat Sep 17 20:28:10 2022
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-X-Patchwork-Submitter: Daniel Golle <daniel@makrotopia.org>
-X-Patchwork-Id: 12979249
-X-Patchwork-Delegate: kvalo@adurom.com
-Return-Path: <linux-wireless-owner@kernel.org>
-Date: Sat, 17 Sep 2022 21:28:10 +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 08/16] rt2x00: add RXIQ calibration for MT7620
-Message-ID:
- <033a39a697d51f6df258acea4c33608e0944fe4c.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 RXIQ calibration found in mtk driver. With old openwrt builds this
-gets us ~8Mbps more of RX bandwidth (test with iPA/eLNA layout).
-
-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(), fix indentation
-
- .../net/wireless/ralink/rt2x00/rt2800lib.c | 375 ++++++++++++++++++
- 1 file changed, 375 insertions(+)
-
---- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
-+++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
-@@ -8692,6 +8692,380 @@ static void rt2800_rxdcoc_calibration(st
- rt2800_rfcsr_write_bank(rt2x00dev, 0, 2, saverfb0r2);
- }
-
-+static u32 rt2800_do_sqrt_accumulation(u32 si)
-+{
-+ u32 root, root_pre, bit;
-+ char i;
-+
-+ bit = 1 << 15;
-+ root = 0;
-+ for (i = 15; i >= 0; i = i - 1) {
-+ root_pre = root + bit;
-+ if ((root_pre * root_pre) <= si)
-+ root = root_pre;
-+ bit = bit >> 1;
-+ }
-+
-+ return root;
-+}
-+
-+static void rt2800_rxiq_calibration(struct rt2x00_dev *rt2x00dev)
-+{
-+ u8 rfb0r1, rfb0r2, rfb0r42;
-+ u8 rfb4r0, rfb4r19;
-+ u8 rfb5r3, rfb5r4, rfb5r17, rfb5r18, rfb5r19, rfb5r20;
-+ u8 rfb6r0, rfb6r19;
-+ u8 rfb7r3, rfb7r4, rfb7r17, rfb7r18, rfb7r19, rfb7r20;
-+
-+ u8 bbp1, bbp4;
-+ u8 bbpr241, bbpr242;
-+ u32 i;
-+ u8 ch_idx;
-+ u8 bbpval;
-+ u8 rfval, vga_idx = 0;
-+ int mi = 0, mq = 0, si = 0, sq = 0, riq = 0;
-+ int sigma_i, sigma_q, r_iq, g_rx;
-+ int g_imb;
-+ int ph_rx;
-+ u32 savemacsysctrl = 0;
-+ u32 orig_RF_CONTROL0 = 0;
-+ u32 orig_RF_BYPASS0 = 0;
-+ u32 orig_RF_CONTROL1 = 0;
-+ u32 orig_RF_BYPASS1 = 0;
-+ u32 orig_RF_CONTROL3 = 0;
-+ u32 orig_RF_BYPASS3 = 0;
-+ u32 bbpval1 = 0;
-+ static const u8 rf_vga_table[] = {0x20, 0x21, 0x22, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f};
-+
-+ savemacsysctrl = rt2800_register_read(rt2x00dev, MAC_SYS_CTRL);
-+ orig_RF_CONTROL0 = rt2800_register_read(rt2x00dev, RF_CONTROL0);
-+ orig_RF_BYPASS0 = rt2800_register_read(rt2x00dev, RF_BYPASS0);
-+ orig_RF_CONTROL1 = rt2800_register_read(rt2x00dev, RF_CONTROL1);
-+ orig_RF_BYPASS1 = rt2800_register_read(rt2x00dev, RF_BYPASS1);
-+ orig_RF_CONTROL3 = rt2800_register_read(rt2x00dev, RF_CONTROL3);
-+ orig_RF_BYPASS3 = rt2800_register_read(rt2x00dev, RF_BYPASS3);
-+
-+ bbp1 = rt2800_bbp_read(rt2x00dev, 1);
-+ bbp4 = rt2800_bbp_read(rt2x00dev, 4);
-+
-+ rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, 0x0);
-+
-+ if (unlikely(rt2800_wait_bbp_rf_ready(rt2x00dev, MAC_STATUS_CFG_BBP_RF_BUSY)))
-+ rt2x00_warn(rt2x00dev, "Timeout waiting for MAC status in RXIQ calibration\n");
-+
-+ bbpval = bbp4 & (~0x18);
-+ bbpval = bbp4 | 0x00;
-+ rt2800_bbp_write(rt2x00dev, 4, bbpval);
-+
-+ bbpval = rt2800_bbp_read(rt2x00dev, 21);
-+ bbpval = bbpval | 1;
-+ rt2800_bbp_write(rt2x00dev, 21, bbpval);
-+ bbpval = bbpval & 0xfe;
-+ rt2800_bbp_write(rt2x00dev, 21, bbpval);
-+
-+ rt2800_register_write(rt2x00dev, RF_CONTROL1, 0x00000202);
-+ rt2800_register_write(rt2x00dev, RF_BYPASS1, 0x00000303);
-+ if (test_bit(CAPABILITY_EXTERNAL_PA_TX0, &rt2x00dev->cap_flags))
-+ rt2800_register_write(rt2x00dev, RF_CONTROL3, 0x0101);
-+ else
-+ rt2800_register_write(rt2x00dev, RF_CONTROL3, 0x0000);
-+
-+ rt2800_register_write(rt2x00dev, RF_BYPASS3, 0xf1f1);
-+
-+ rfb0r1 = rt2800_rfcsr_read_bank(rt2x00dev, 0, 1);
-+ rfb0r2 = rt2800_rfcsr_read_bank(rt2x00dev, 0, 2);
-+ rfb0r42 = rt2800_rfcsr_read_bank(rt2x00dev, 0, 42);
-+ rfb4r0 = rt2800_rfcsr_read_bank(rt2x00dev, 4, 0);
-+ rfb4r19 = rt2800_rfcsr_read_bank(rt2x00dev, 4, 19);
-+ rfb5r3 = rt2800_rfcsr_read_bank(rt2x00dev, 5, 3);
-+ rfb5r4 = rt2800_rfcsr_read_bank(rt2x00dev, 5, 4);
-+ rfb5r17 = rt2800_rfcsr_read_bank(rt2x00dev, 5, 17);
-+ rfb5r18 = rt2800_rfcsr_read_bank(rt2x00dev, 5, 18);
-+ rfb5r19 = rt2800_rfcsr_read_bank(rt2x00dev, 5, 19);
-+ rfb5r20 = rt2800_rfcsr_read_bank(rt2x00dev, 5, 20);
-+
-+ rfb6r0 = rt2800_rfcsr_read_bank(rt2x00dev, 6, 0);
-+ rfb6r19 = rt2800_rfcsr_read_bank(rt2x00dev, 6, 19);
-+ rfb7r3 = rt2800_rfcsr_read_bank(rt2x00dev, 7, 3);
-+ rfb7r4 = rt2800_rfcsr_read_bank(rt2x00dev, 7, 4);
-+ rfb7r17 = rt2800_rfcsr_read_bank(rt2x00dev, 7, 17);
-+ rfb7r18 = rt2800_rfcsr_read_bank(rt2x00dev, 7, 18);
-+ rfb7r19 = rt2800_rfcsr_read_bank(rt2x00dev, 7, 19);
-+ rfb7r20 = rt2800_rfcsr_read_bank(rt2x00dev, 7, 20);
-+
-+ rt2800_rfcsr_write_chanreg(rt2x00dev, 0, 0x87);
-+ rt2800_rfcsr_write_chanreg(rt2x00dev, 19, 0x27);
-+ rt2800_rfcsr_write_dccal(rt2x00dev, 3, 0x38);
-+ rt2800_rfcsr_write_dccal(rt2x00dev, 4, 0x38);
-+ rt2800_rfcsr_write_dccal(rt2x00dev, 17, 0x80);
-+ rt2800_rfcsr_write_dccal(rt2x00dev, 18, 0xC1);
-+ rt2800_rfcsr_write_dccal(rt2x00dev, 19, 0x60);
-+ rt2800_rfcsr_write_dccal(rt2x00dev, 20, 0x00);
-+
-+ rt2800_bbp_write(rt2x00dev, 23, 0x0);
-+ rt2800_bbp_write(rt2x00dev, 24, 0x0);
-+
-+ rt2800_bbp_dcoc_write(rt2x00dev, 5, 0x0);
-+
-+ bbpr241 = rt2800_bbp_read(rt2x00dev, 241);
-+ bbpr242 = rt2800_bbp_read(rt2x00dev, 242);
-+
-+ rt2800_bbp_write(rt2x00dev, 241, 0x10);
-+ rt2800_bbp_write(rt2x00dev, 242, 0x84);
-+ rt2800_bbp_write(rt2x00dev, 244, 0x31);
-+
-+ bbpval = rt2800_bbp_dcoc_read(rt2x00dev, 3);
-+ bbpval = bbpval & (~0x7);
-+ rt2800_bbp_dcoc_write(rt2x00dev, 3, bbpval);
-+
-+ rt2800_register_write(rt2x00dev, RF_CONTROL0, 0x00000004);
-+ udelay(1);
-+ rt2800_register_write(rt2x00dev, RF_CONTROL0, 0x00000006);
-+ usleep_range(1, 200);
-+ rt2800_register_write(rt2x00dev, RF_BYPASS0, 0x00003376);
-+ rt2800_register_write(rt2x00dev, RF_CONTROL0, 0x00001006);
-+ udelay(1);
-+ if (test_bit(CAPABILITY_EXTERNAL_PA_TX0, &rt2x00dev->cap_flags)) {
-+ rt2800_bbp_write(rt2x00dev, 23, 0x06);
-+ rt2800_bbp_write(rt2x00dev, 24, 0x06);
-+ } else {
-+ rt2800_bbp_write(rt2x00dev, 23, 0x02);
-+ rt2800_bbp_write(rt2x00dev, 24, 0x02);
-+ }
-+
-+ for (ch_idx = 0; ch_idx < 2; ch_idx = ch_idx + 1) {
-+ if (ch_idx == 0) {
-+ rfval = rfb0r1 & (~0x3);
-+ rfval = rfb0r1 | 0x1;
-+ rt2800_rfcsr_write_bank(rt2x00dev, 0, 1, rfval);
-+ rfval = rfb0r2 & (~0x33);
-+ rfval = rfb0r2 | 0x11;
-+ rt2800_rfcsr_write_bank(rt2x00dev, 0, 2, rfval);
-+ rfval = rfb0r42 & (~0x50);
-+ rfval = rfb0r42 | 0x10;
-+ rt2800_rfcsr_write_bank(rt2x00dev, 0, 42, rfval);
-+
-+ rt2800_register_write(rt2x00dev, RF_CONTROL0, 0x00001006);
-+ udelay(1);
-+
-+ bbpval = bbp1 & (~0x18);
-+ bbpval = bbpval | 0x00;
-+ rt2800_bbp_write(rt2x00dev, 1, bbpval);
-+
-+ rt2800_bbp_dcoc_write(rt2x00dev, 1, 0x00);
-+ } else {
-+ rfval = rfb0r1 & (~0x3);
-+ rfval = rfb0r1 | 0x2;
-+ rt2800_rfcsr_write_bank(rt2x00dev, 0, 1, rfval);
-+ rfval = rfb0r2 & (~0x33);
-+ rfval = rfb0r2 | 0x22;
-+ rt2800_rfcsr_write_bank(rt2x00dev, 0, 2, rfval);
-+ rfval = rfb0r42 & (~0x50);
-+ rfval = rfb0r42 | 0x40;
-+ rt2800_rfcsr_write_bank(rt2x00dev, 0, 42, rfval);
-+
-+ rt2800_register_write(rt2x00dev, RF_CONTROL0, 0x00002006);
-+ udelay(1);
-+
-+ bbpval = bbp1 & (~0x18);
-+ bbpval = bbpval | 0x08;
-+ rt2800_bbp_write(rt2x00dev, 1, bbpval);
-+
-+ rt2800_bbp_dcoc_write(rt2x00dev, 1, 0x01);
-+ }
-+ usleep_range(500, 1500);
-+
-+ vga_idx = 0;
-+ while (vga_idx < 11) {
-+ rt2800_rfcsr_write_dccal(rt2x00dev, 3, rf_vga_table[vga_idx]);
-+ rt2800_rfcsr_write_dccal(rt2x00dev, 4, rf_vga_table[vga_idx]);
-+
-+ rt2800_bbp_dcoc_write(rt2x00dev, 0, 0x93);
-+
-+ for (i = 0; i < 10000; i++) {
-+ bbpval = rt2800_bbp_read(rt2x00dev, 159);
-+ if ((bbpval & 0xff) == 0x93)
-+ usleep_range(50, 100);
-+ else
-+ break;
-+ }
-+
-+ if ((bbpval & 0xff) == 0x93) {
-+ rt2x00_warn(rt2x00dev, "Fatal Error: Calibration doesn't finish");
-+ goto restore_value;
-+ }
-+ for (i = 0; i < 5; i++) {
-+ u32 bbptemp = 0;
-+ u8 value = 0;
-+ int result = 0;
-+
-+ rt2800_bbp_write(rt2x00dev, 158, 0x1e);
-+ rt2800_bbp_write(rt2x00dev, 159, i);
-+ rt2800_bbp_write(rt2x00dev, 158, 0x22);
-+ value = rt2800_bbp_read(rt2x00dev, 159);
-+ bbptemp = bbptemp + (value << 24);
-+ rt2800_bbp_write(rt2x00dev, 158, 0x21);
-+ value = rt2800_bbp_read(rt2x00dev, 159);
-+ bbptemp = bbptemp + (value << 16);
-+ rt2800_bbp_write(rt2x00dev, 158, 0x20);
-+ value = rt2800_bbp_read(rt2x00dev, 159);
-+ bbptemp = bbptemp + (value << 8);
-+ rt2800_bbp_write(rt2x00dev, 158, 0x1f);
-+ value = rt2800_bbp_read(rt2x00dev, 159);
-+ bbptemp = bbptemp + value;
-+
-+ if (i < 2 && (bbptemp & 0x800000))
-+ result = (bbptemp & 0xffffff) - 0x1000000;
-+ else if (i == 4)
-+ result = bbptemp;
-+ else
-+ result = bbptemp;
-+
-+ if (i == 0)
-+ mi = result / 4096;
-+ else if (i == 1)
-+ mq = result / 4096;
-+ else if (i == 2)
-+ si = bbptemp / 4096;
-+ else if (i == 3)
-+ sq = bbptemp / 4096;
-+ else
-+ riq = result / 4096;
-+ }
-+
-+ bbpval1 = si - mi * mi;
-+ rt2x00_dbg(rt2x00dev,
-+ "RXIQ si=%d, sq=%d, riq=%d, bbpval %d, vga_idx %d",
-+ si, sq, riq, bbpval1, vga_idx);
-+
-+ if (bbpval1 >= (100 * 100))
-+ break;
-+
-+ if (bbpval1 <= 100)
-+ vga_idx = vga_idx + 9;
-+ else if (bbpval1 <= 158)
-+ vga_idx = vga_idx + 8;
-+ else if (bbpval1 <= 251)
-+ vga_idx = vga_idx + 7;
-+ else if (bbpval1 <= 398)
-+ vga_idx = vga_idx + 6;
-+ else if (bbpval1 <= 630)
-+ vga_idx = vga_idx + 5;
-+ else if (bbpval1 <= 1000)
-+ vga_idx = vga_idx + 4;
-+ else if (bbpval1 <= 1584)
-+ vga_idx = vga_idx + 3;
-+ else if (bbpval1 <= 2511)
-+ vga_idx = vga_idx + 2;
-+ else
-+ vga_idx = vga_idx + 1;
-+ }
-+
-+ sigma_i = rt2800_do_sqrt_accumulation(100 * (si - mi * mi));
-+ sigma_q = rt2800_do_sqrt_accumulation(100 * (sq - mq * mq));
-+ r_iq = 10 * (riq - (mi * mq));
-+
-+ rt2x00_dbg(rt2x00dev, "Sigma_i=%d, Sigma_q=%d, R_iq=%d", sigma_i, sigma_q, r_iq);
-+
-+ if (sigma_i <= 1400 && sigma_i >= 1000 &&
-+ (sigma_i - sigma_q) <= 112 &&
-+ (sigma_i - sigma_q) >= -112 &&
-+ mi <= 32 && mi >= -32 &&
-+ mq <= 32 && mq >= -32) {
-+ r_iq = 10 * (riq - (mi * mq));
-+ rt2x00_dbg(rt2x00dev, "RXIQ Sigma_i=%d, Sigma_q=%d, R_iq=%d\n",
-+ sigma_i, sigma_q, r_iq);
-+
-+ g_rx = (1000 * sigma_q) / sigma_i;
-+ g_imb = ((-2) * 128 * (1000 - g_rx)) / (1000 + g_rx);
-+ ph_rx = (r_iq * 2292) / (sigma_i * sigma_q);
-+
-+ if (ph_rx > 20 || ph_rx < -20) {
-+ ph_rx = 0;
-+ rt2x00_warn(rt2x00dev, "RXIQ calibration FAIL");
-+ }
-+
-+ if (g_imb > 12 || g_imb < -12) {
-+ g_imb = 0;
-+ rt2x00_warn(rt2x00dev, "RXIQ calibration FAIL");
-+ }
-+ } else {
-+ g_imb = 0;
-+ ph_rx = 0;
-+ rt2x00_dbg(rt2x00dev, "RXIQ Sigma_i=%d, Sigma_q=%d, R_iq=%d\n",
-+ sigma_i, sigma_q, r_iq);
-+ rt2x00_warn(rt2x00dev, "RXIQ calibration FAIL");
-+ }
-+
-+ if (ch_idx == 0) {
-+ rt2800_bbp_write(rt2x00dev, 158, 0x37);
-+ rt2800_bbp_write(rt2x00dev, 159, g_imb & 0x3f);
-+ rt2800_bbp_write(rt2x00dev, 158, 0x35);
-+ rt2800_bbp_write(rt2x00dev, 159, ph_rx & 0x3f);
-+ } else {
-+ rt2800_bbp_write(rt2x00dev, 158, 0x55);
-+ rt2800_bbp_write(rt2x00dev, 159, g_imb & 0x3f);
-+ rt2800_bbp_write(rt2x00dev, 158, 0x53);
-+ rt2800_bbp_write(rt2x00dev, 159, ph_rx & 0x3f);
-+ }
-+ }
-+
-+restore_value:
-+ rt2800_bbp_write(rt2x00dev, 158, 0x3);
-+ bbpval = rt2800_bbp_read(rt2x00dev, 159);
-+ rt2800_bbp_write(rt2x00dev, 159, (bbpval | 0x07));
-+
-+ rt2800_bbp_write(rt2x00dev, 158, 0x00);
-+ rt2800_bbp_write(rt2x00dev, 159, 0x00);
-+ rt2800_bbp_write(rt2x00dev, 1, bbp1);
-+ rt2800_bbp_write(rt2x00dev, 4, bbp4);
-+ rt2800_bbp_write(rt2x00dev, 241, bbpr241);
-+ rt2800_bbp_write(rt2x00dev, 242, bbpr242);
-+
-+ rt2800_bbp_write(rt2x00dev, 244, 0x00);
-+ bbpval = rt2800_bbp_read(rt2x00dev, 21);
-+ bbpval |= 0x1;
-+ rt2800_bbp_write(rt2x00dev, 21, bbpval);
-+ usleep_range(10, 200);
-+ bbpval &= 0xfe;
-+ rt2800_bbp_write(rt2x00dev, 21, bbpval);
-+
-+ rt2800_rfcsr_write_bank(rt2x00dev, 0, 1, rfb0r1);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 0, 2, rfb0r2);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 0, 42, rfb0r42);
-+
-+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 0, rfb4r0);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 4, 19, rfb4r19);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 5, 3, rfb5r3);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 5, 4, rfb5r4);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 5, 17, rfb5r17);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 5, 18, rfb5r18);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 5, 19, rfb5r19);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 5, 20, rfb5r20);
-+
-+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 0, rfb6r0);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 6, 19, rfb6r19);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 7, 3, rfb7r3);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 7, 4, rfb7r4);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 7, 17, rfb7r17);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 7, 18, rfb7r18);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 7, 19, rfb7r19);
-+ rt2800_rfcsr_write_bank(rt2x00dev, 7, 20, rfb7r20);
-+
-+ rt2800_register_write(rt2x00dev, RF_CONTROL0, 0x00000006);
-+ udelay(1);
-+ rt2800_register_write(rt2x00dev, RF_CONTROL0, 0x00000004);
-+ udelay(1);
-+ rt2800_register_write(rt2x00dev, RF_CONTROL0, orig_RF_CONTROL0);
-+ udelay(1);
-+ rt2800_register_write(rt2x00dev, RF_BYPASS0, orig_RF_BYPASS0);
-+ rt2800_register_write(rt2x00dev, RF_CONTROL1, orig_RF_CONTROL1);
-+ rt2800_register_write(rt2x00dev, RF_BYPASS1, orig_RF_BYPASS1);
-+ rt2800_register_write(rt2x00dev, RF_CONTROL3, orig_RF_CONTROL3);
-+ rt2800_register_write(rt2x00dev, RF_BYPASS3, orig_RF_BYPASS3);
-+ rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, savemacsysctrl);
-+}
-+
- static void rt2800_bbp_core_soft_reset(struct rt2x00_dev *rt2x00dev,
- bool set_bw, bool is_ht40)
- {
-@@ -9304,6 +9678,7 @@ static void rt2800_init_rfcsr_6352(struc
- rt2800_rxdcoc_calibration(rt2x00dev);
- rt2800_bw_filter_calibration(rt2x00dev, true);
- rt2800_bw_filter_calibration(rt2x00dev, false);
-+ rt2800_rxiq_calibration(rt2x00dev);
- }
-
- static void rt2800_init_rfcsr(struct rt2x00_dev *rt2x00dev)
projects / openwrt / openwrt.git / blobdiff