From b75efecd6473e6a044d214571c17cad8ae88ed42 Mon Sep 17 00:00:00 2001 From: Daniel Golle Date: Mon, 8 Jan 2018 13:42:58 +0100 Subject: [PATCH 05/16] rt2x00: add r calibration for MT7620 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit To: linux-wireless@vger.kernel.org, Stanislaw Gruszka , Helmut Schaa Cc: Kalle Valo , David S. Miller , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Johannes Berg From: Tomislav Požega Add r calibration code as found in mtk driver. Signed-off-by: Tomislav Požega --- .../net/wireless/ralink/rt2x00/rt2800lib.c | 150 ++++++++++++++++++ 1 file changed, 150 insertions(+) --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c @@ -8483,6 +8483,155 @@ 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, macstatus; + int i; + + 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); + + for (i = 0; i < 10000; i++) { + macstatus = rt2800_register_read(rt2x00dev, MAC_STATUS_CFG); + if (macstatus & 0x1) + usleep_range(50, 100); + else + break; + } + + if (i == 10000) + 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); + + for (i = 0; i < 10000; i++) { + macstatus = rt2800_register_read(rt2x00dev, MAC_STATUS_CFG); + if (macstatus & 0x2) + usleep_range(50, 100); + else + break; + } + + if (i == 10000) + 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) { @@ -9090,6 +9239,7 @@ 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);