From: Tomislav Požega Date: Mon, 8 Jan 2018 12:43:56 +0000 (+0100) Subject: mac80211: rt2x00: add RXIQ calibration X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=5d1620f29c9180881ed1c0c7b79e476cc98fd7dd;p=openwrt%2Fstaging%2Fxback.git mac80211: rt2x00: add RXIQ calibration Add RXIQ calibration found in mtk driver. With old openwrt builds this gets us ~8Mbps more of RX bandwidth (test with iPA/eLNA layout). Please try if this makes any difference among various board/RF layouts. Signed-off-by: Tomislav Požega --- diff --git a/package/kernel/mac80211/patches/rt2x00/985-rt2x00-add-rxiq-calibration.patch b/package/kernel/mac80211/patches/rt2x00/985-rt2x00-add-rxiq-calibration.patch new file mode 100644 index 0000000000..0465d7e4a8 --- /dev/null +++ b/package/kernel/mac80211/patches/rt2x00/985-rt2x00-add-rxiq-calibration.patch @@ -0,0 +1,417 @@ +--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c ++++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c +@@ -7923,6 +7923,386 @@ void rt2800_rxdcoc_calibration(struct rt + } + EXPORT_SYMBOL_GPL(rt2800_rxdcoc_calibration); + ++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; ++} ++EXPORT_SYMBOL_GPL(rt2800_do_sqrt_accumulation); ++ ++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 macstatus, bbpval1 = 0; ++ 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); ++ ++ for (i = 0; i < 10000; i++) { ++ macstatus = rt2800_register_read(rt2x00dev, MAC_STATUS_CFG); ++ if (macstatus & 0x3) ++ udelay(50); ++ else ++ break; ++ } ++ ++ if (i == 10000) ++ rt2x00_warn(rt2x00dev, "Wait MAC Status to MAX !!!\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); ++ } ++ udelay(500); ++ ++ 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) ++ udelay(50); ++ 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); ++ rt2x00_info(rt2x00dev, "RXIQ G_imb=%d, Ph_rx=%d\n", g_imb, ph_rx); ++ ++ 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 = (bbpval | 0x1); ++ rt2800_bbp_write(rt2x00dev, 21, bbpval); ++ usleep_range(10, 200); ++ bbpval = (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); ++} ++EXPORT_SYMBOL_GPL(rt2800_rxiq_calibration); ++ + static void rt2800_bbp_core_soft_reset(struct rt2x00_dev *rt2x00dev, + bool set_bw, bool is_ht40) + { +@@ -8535,6 +8915,7 @@ 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) +--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.h ++++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.h +@@ -231,6 +231,7 @@ void rt2800_rf_self_txdc_cal(struct rt2x + int rt2800_calcrcalibrationcode(struct rt2x00_dev *rt2x00dev, int d1, int d2); + void rt2800_r_calibration(struct rt2x00_dev *rt2x00dev); + void rt2800_rxdcoc_calibration(struct rt2x00_dev *rt2x00dev); ++void rt2800_rxiq_calibration(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 +@@ -574,6 +574,7 @@ struct rt2x00lib_ops { + int (*calcrcalibrationcode) (struct rt2x00_dev *rt2x00dev, int d1, int d2); + void (*r_calibration) (struct rt2x00_dev *rt2x00dev); + void (*rxdcoc_calibration) (struct rt2x00_dev *rt2x00dev); ++ void (*rxiq_calibration) (struct rt2x00_dev *rt2x00dev); + + /* + * Data queue handlers.