From: Shiji Yang Date: Sat, 29 Jul 2023 13:24:09 +0000 (+0800) Subject: mac80211: rework MT7620 PA/LNA RF calibration X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=2824fa6963cf245b7e0b04aa96bcbe5013524b85;p=openwrt%2Fstaging%2Fansuel.git mac80211: rework MT7620 PA/LNA RF calibration This patch makes some improvements to the MT7620 RF calibration. 1. Move MT7620 PA/LNA calibration code to dedicated functions. 2. Restore RF and BBP registers before R-Calibration. 3. Do Rx DCOC calibration again before RXIQ calibration. 4. Use SoC specific AGC initial LNA value. 5. Correct MAC_RX_EN mask in rt2800_r_calibration()[1]. [1] This change may fix the "BBP/RF register access failed" error: ieee80211 phy0: rt2800_wait_bbp_rf_ready: Error - BBP/RF register access failed, aborting Signed-off-by: Shiji Yang --- diff --git a/package/kernel/mac80211/patches/rt2x00/998-wifi-rt2x00-rework-MT7620-PA-LNA-RF-calibration.patch b/package/kernel/mac80211/patches/rt2x00/998-wifi-rt2x00-rework-MT7620-PA-LNA-RF-calibration.patch new file mode 100644 index 0000000000..7fdad63976 --- /dev/null +++ b/package/kernel/mac80211/patches/rt2x00/998-wifi-rt2x00-rework-MT7620-PA-LNA-RF-calibration.patch @@ -0,0 +1,434 @@ +From: Shiji Yang +Date: Tue, 25 Jul 2023 20:05:06 +0800 +Subject: [PATCH] wifi: rt2x00: rework MT7620 PA/LNA RF calibration + +1. Move MT7620 PA/LNA calibration code to dedicated functions. + Calibration stage 1 is executed before configuring channels and + stage 2 is executed after configuring channels. +2. For external PA/LNA devices, restore RF and BBP registers before + R-Calibration. +3. Do Rx DCOC calibration again before RXIQ calibration. +4. Correct MAC_SYS_CTRL register RX mask to 0x08 in R-Calibration + function. For MAC_SYS_CTRL register, Bit[2] controls MAC_TX_EN + and Bit[3] controls MAC_RX_EN (Bit index starts from 0). +5. Move the channel configuration code from rt2800_vco_calibration() + to the rt2800_config_channel(). +6. Use MT7620 SOC specific AGC initial LNA value instead of the + RT5592's value. +7. Adjust the register operation sequence according to the vendor + driver code. This may not be useful, but it can make things + clearer when developers try to review it. + +Signed-off-by: Shiji Yang +--- + .../net/wireless/ralink/rt2x00/rt2800lib.c | 318 +++++++++++------- + drivers/net/wireless/ralink/rt2x00/rt2x00.h | 6 + + 2 files changed, 194 insertions(+), 130 deletions(-) + +--- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c ++++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c +@@ -62,6 +62,9 @@ MODULE_PARM_DESC(watchdog, "Enable watch + rt2800_regbusy_read((__dev), H2M_MAILBOX_CSR, \ + H2M_MAILBOX_CSR_OWNER, (__reg)) + ++static void rt6352_init_palna_stage1(struct rt2x00_dev *rt2x00dev); ++static void rt6352_init_palna_stage2(struct rt2x00_dev *rt2x00dev); ++ + static inline bool rt2800_is_305x_soc(struct rt2x00_dev *rt2x00dev) + { + /* check for rt2872 on SoC */ +@@ -3881,14 +3884,6 @@ static void rt2800_config_channel_rf7620 + rfcsr |= tx_agc_fc; + rt2800_rfcsr_write_bank(rt2x00dev, 7, 59, rfcsr); + } +- +- if (conf_is_ht40(conf)) { +- rt2800_bbp_glrt_write(rt2x00dev, 141, 0x10); +- rt2800_bbp_glrt_write(rt2x00dev, 157, 0x2f); +- } else { +- rt2800_bbp_glrt_write(rt2x00dev, 141, 0x1a); +- rt2800_bbp_glrt_write(rt2x00dev, 157, 0x40); +- } + } + + static void rt2800_config_alc_rt6352(struct rt2x00_dev *rt2x00dev, +@@ -4151,6 +4146,9 @@ static void rt2800_config_channel(struct + rt2800_txpower_to_dev(rt2x00dev, rf->channel, + info->default_power3); + ++ if (rt2x00_rt(rt2x00dev, RT6352)) ++ rt6352_init_palna_stage1(rt2x00dev); ++ + switch (rt2x00dev->chip.rt) { + case RT3883: + rt3883_bbp_adjust(rt2x00dev, rf); +@@ -4457,89 +4455,65 @@ static void rt2800_config_channel(struct + usleep_range(1000, 1500); + } + +- if (rt2x00_rt(rt2x00dev, RT5592) || rt2x00_rt(rt2x00dev, RT6352)) { ++ if (rt2x00_rt(rt2x00dev, RT5592)) { + reg = 0x10; +- if (!conf_is_ht40(conf)) { +- if (rt2x00_rt(rt2x00dev, RT6352) && +- rt2x00_has_cap_external_lna_bg(rt2x00dev)) { +- reg |= 0x5; +- } else { +- reg |= 0xa; +- } +- } ++ if (!conf_is_ht40(conf)) ++ reg |= 0xa; + rt2800_bbp_write(rt2x00dev, 195, 141); + rt2800_bbp_write(rt2x00dev, 196, reg); + +- /* AGC init. +- * Despite the vendor driver using different values here for +- * RT6352 chip, we use 0x1c for now. This may have to be changed +- * once TSSI got implemented. +- */ + reg = (rf->channel <= 14 ? 0x1c : 0x24) + 2*rt2x00dev->lna_gain; + rt2800_bbp_write_with_rx_chain(rt2x00dev, 66, reg); +- +- if (rt2x00_rt(rt2x00dev, RT5592)) +- rt2800_iq_calibrate(rt2x00dev, rf->channel); ++ ++ rt2800_iq_calibrate(rt2x00dev, rf->channel); + } + + if (rt2x00_rt(rt2x00dev, RT6352)) { +- if (test_bit(CAPABILITY_EXTERNAL_PA_TX0, +- &rt2x00dev->cap_flags)) { +- reg = rt2800_register_read(rt2x00dev, RF_CONTROL3); +- reg |= 0x00000101; +- rt2800_register_write(rt2x00dev, RF_CONTROL3, reg); +- +- reg = rt2800_register_read(rt2x00dev, RF_BYPASS3); +- reg |= 0x00000101; +- rt2800_register_write(rt2x00dev, RF_BYPASS3, reg); +- +- rt2800_rfcsr_write_chanreg(rt2x00dev, 43, 0x73); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 44, 0x73); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 45, 0x73); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 46, 0x27); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 47, 0xC8); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 48, 0xA4); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 49, 0x05); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 54, 0x27); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 55, 0xC8); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 56, 0xA4); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 57, 0x05); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 58, 0x27); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 59, 0xC8); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 60, 0xA4); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 61, 0x05); +- rt2800_rfcsr_write_dccal(rt2x00dev, 05, 0x00); ++ /* BBP for GLRT BW */ ++ if (conf_is_ht40(conf)) { ++ rt2800_bbp_glrt_write(rt2x00dev, 141, 0x10); ++ rt2800_bbp_glrt_write(rt2x00dev, 157, 0x2f); ++ } else { ++ rt2800_bbp_glrt_write(rt2x00dev, 141, 0x1a); ++ rt2800_bbp_glrt_write(rt2x00dev, 157, 0x40); + +- rt2800_register_write(rt2x00dev, TX0_RF_GAIN_CORRECT, +- 0x36303636); +- rt2800_register_write(rt2x00dev, TX0_RF_GAIN_ATTEN, +- 0x6C6C6B6C); +- rt2800_register_write(rt2x00dev, TX1_RF_GAIN_ATTEN, +- 0x6C6C6B6C); ++ if (rt2800_hw_get_chippkg(rt2x00dev) == 1 && ++ rt2x00_has_cap_external_lna_bg(rt2x00dev)) ++ rt2800_bbp_glrt_write(rt2x00dev, 141, 0x15); + } + +- if (rt2x00_has_cap_external_lna_bg(rt2x00dev)) { +- reg = rt2800_register_read(rt2x00dev, RF_CONTROL3); +- reg |= 0x00000101; +- rt2800_register_write(rt2x00dev, RF_CONTROL3, reg); +- +- reg = rt2800_register_read(rt2x00dev, RF_BYPASS3); +- reg |= 0x00000101; +- rt2800_register_write(rt2x00dev, RF_BYPASS3, reg); +- +- rt2800_rfcsr_write_chanreg(rt2x00dev, 14, 0x66); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 17, 0x20); +- rt2800_rfcsr_write_chanreg(rt2x00dev, 18, 0x42); +- rt2800_bbp_write(rt2x00dev, 75, 0x68); +- rt2800_bbp_write(rt2x00dev, 76, 0x4C); +- rt2800_bbp_write(rt2x00dev, 79, 0x1C); +- rt2800_bbp_write(rt2x00dev, 80, 0x0C); +- rt2800_bbp_write(rt2x00dev, 82, 0xB6); +- /* bank 0 RF reg 42 and glrt BBP reg 141 will be set in +- * config channel function in dependence of channel and +- * HT20/HT40 so don't touch it +- */ ++ if (rt2x00dev->default_ant.rx_chain_num == 1) { ++ rt2800_bbp_write(rt2x00dev, 91, 0x07); ++ rt2800_bbp_write(rt2x00dev, 95, 0x1A); ++ rt2800_bbp_write(rt2x00dev, 195, 128); ++ rt2800_bbp_write(rt2x00dev, 196, 0xA0); ++ rt2800_bbp_write(rt2x00dev, 195, 170); ++ rt2800_bbp_write(rt2x00dev, 196, 0x12); ++ rt2800_bbp_write(rt2x00dev, 195, 171); ++ rt2800_bbp_write(rt2x00dev, 196, 0x10); ++ } else { ++ rt2800_bbp_write(rt2x00dev, 91, 0x06); ++ rt2800_bbp_write(rt2x00dev, 95, 0x9A); ++ rt2800_bbp_write(rt2x00dev, 195, 128); ++ rt2800_bbp_write(rt2x00dev, 196, 0xE0); ++ rt2800_bbp_write(rt2x00dev, 195, 170); ++ rt2800_bbp_write(rt2x00dev, 196, 0x30); ++ rt2800_bbp_write(rt2x00dev, 195, 171); ++ rt2800_bbp_write(rt2x00dev, 196, 0x30); + } ++ ++ /* AGC init */ ++ reg = rf->channel <= 14 ? 0x04 + 2 * rt2x00dev->lna_gain : 0; ++ rt2800_bbp_write_with_rx_chain(rt2x00dev, 66, reg); ++ ++ /* On 11A, We should delay and wait RF/BBP to be stable ++ * and the appropriate time should be 1000 micro seconds ++ * 2005/06/05 - On 11G, we also need this delay time. ++ * Otherwise it's difficult to pass the WHQL. ++ */ ++ usleep_range(1000, 1500); ++ ++ rt6352_init_palna_stage2(rt2x00dev); + } + + bbp = rt2800_bbp_read(rt2x00dev, 4); +@@ -5649,43 +5623,6 @@ void rt2800_vco_calibration(struct rt2x0 + } + } + rt2800_register_write(rt2x00dev, TX_PIN_CFG, tx_pin); +- +- if (rt2x00_rt(rt2x00dev, RT6352)) { +- if (rt2x00dev->default_ant.rx_chain_num == 1) { +- rt2800_bbp_write(rt2x00dev, 91, 0x07); +- rt2800_bbp_write(rt2x00dev, 95, 0x1A); +- rt2800_bbp_write(rt2x00dev, 195, 128); +- rt2800_bbp_write(rt2x00dev, 196, 0xA0); +- rt2800_bbp_write(rt2x00dev, 195, 170); +- rt2800_bbp_write(rt2x00dev, 196, 0x12); +- rt2800_bbp_write(rt2x00dev, 195, 171); +- rt2800_bbp_write(rt2x00dev, 196, 0x10); +- } else { +- rt2800_bbp_write(rt2x00dev, 91, 0x06); +- rt2800_bbp_write(rt2x00dev, 95, 0x9A); +- rt2800_bbp_write(rt2x00dev, 195, 128); +- rt2800_bbp_write(rt2x00dev, 196, 0xE0); +- rt2800_bbp_write(rt2x00dev, 195, 170); +- rt2800_bbp_write(rt2x00dev, 196, 0x30); +- rt2800_bbp_write(rt2x00dev, 195, 171); +- rt2800_bbp_write(rt2x00dev, 196, 0x30); +- } +- +- if (rt2x00_has_cap_external_lna_bg(rt2x00dev)) { +- rt2800_bbp_write(rt2x00dev, 75, 0x68); +- rt2800_bbp_write(rt2x00dev, 76, 0x4C); +- rt2800_bbp_write(rt2x00dev, 79, 0x1C); +- rt2800_bbp_write(rt2x00dev, 80, 0x0C); +- rt2800_bbp_write(rt2x00dev, 82, 0xB6); +- } +- +- /* On 11A, We should delay and wait RF/BBP to be stable +- * and the appropriate time should be 1000 micro seconds +- * 2005/06/05 - On 11G, we also need this delay time. +- * Otherwise it's difficult to pass the WHQL. +- */ +- usleep_range(1000, 1500); +- } + } + EXPORT_SYMBOL_GPL(rt2800_vco_calibration); + +@@ -8650,7 +8587,7 @@ static void rt2800_r_calibration(struct + rt2x00_warn(rt2x00dev, "Wait MAC Tx Status to MAX !!!\n"); + + maccfg = rt2800_register_read(rt2x00dev, MAC_SYS_CTRL); +- maccfg &= (~0x04); ++ maccfg &= (~0x08); + rt2800_register_write(rt2x00dev, MAC_SYS_CTRL, maccfg); + + if (unlikely(rt2800_wait_bbp_rf_ready(rt2x00dev, MAC_STATUS_CFG_BBP_RF_BUSY_RX))) +@@ -10688,30 +10625,151 @@ static void rt2800_init_rfcsr_6352(struc + rt2800_rfcsr_write_dccal(rt2x00dev, 5, 0x00); + rt2800_rfcsr_write_dccal(rt2x00dev, 17, 0x7C); + } ++} + +- rt6352_enable_pa_pin(rt2x00dev, 0); +- rt2800_r_calibration(rt2x00dev); +- rt2800_rf_self_txdc_cal(rt2x00dev); +- rt2800_rxdcoc_calibration(rt2x00dev); +- rt2800_bw_filter_calibration(rt2x00dev, true); +- rt2800_bw_filter_calibration(rt2x00dev, false); +- rt2800_loft_iq_calibration(rt2x00dev); +- rt2800_rxiq_calibration(rt2x00dev); +- rt6352_enable_pa_pin(rt2x00dev, 1); ++static void rt6352_init_ext_palna(struct rt2x00_dev *rt2x00dev) ++{ ++ u32 reg; ++ ++ if (rt2x00_has_cap_external_pa(rt2x00dev)) { ++ reg = rt2800_register_read(rt2x00dev, RF_CONTROL3); ++ reg |= 0x00000101; ++ rt2800_register_write(rt2x00dev, RF_CONTROL3, reg); ++ ++ reg = rt2800_register_read(rt2x00dev, RF_BYPASS3); ++ reg |= 0x00000101; ++ rt2800_register_write(rt2x00dev, RF_BYPASS3, reg); ++ } + +- if (rt2x00_has_cap_external_lna_bg(rt2x00dev)) { ++ if (rt2800_hw_get_chippkg(rt2x00dev) == 1 && ++ rt2x00_has_cap_external_lna_bg(rt2x00dev)) { + rt2800_rfcsr_write_chanreg(rt2x00dev, 14, 0x66); + rt2800_rfcsr_write_chanreg(rt2x00dev, 17, 0x20); + rt2800_rfcsr_write_chanreg(rt2x00dev, 18, 0x42); ++ } ++ ++ if (rt2800_hw_get_chippkg(rt2x00dev) == 1 && ++ rt2x00_has_cap_external_pa(rt2x00dev)) { ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 43, 0x73); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 44, 0x73); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 45, 0x73); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 46, 0x27); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 47, 0xC8); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 48, 0xA4); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 49, 0x05); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 54, 0x27); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 55, 0xC8); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 56, 0xA4); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 57, 0x05); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 58, 0x27); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 59, 0xC8); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 60, 0xA4); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 61, 0x05); ++ } ++ ++ if (rt2800_hw_get_chippkg(rt2x00dev) == 1 && ++ rt2x00_has_cap_external_pa(rt2x00dev)) { ++ rt2800_rfcsr_write_dccal(rt2x00dev, 05, 0x00); ++ } ++ ++ if (rt2800_hw_get_chippkg(rt2x00dev) == 1 && ++ rt2x00_has_cap_external_lna_bg(rt2x00dev)) { + rt2800_bbp_write(rt2x00dev, 75, 0x68); + rt2800_bbp_write(rt2x00dev, 76, 0x4C); + rt2800_bbp_write(rt2x00dev, 79, 0x1C); + rt2800_bbp_write(rt2x00dev, 80, 0x0C); + rt2800_bbp_write(rt2x00dev, 82, 0xB6); +- /* bank 0 RF reg 42 and glrt BBP reg 141 will be set in config +- * channel function in dependence of channel and HT20/HT40, +- * so don't touch them here. +- */ ++ } ++ ++ if (rt2800_hw_get_chippkg(rt2x00dev) == 1 && ++ rt2x00_has_cap_external_pa(rt2x00dev)) { ++ rt2800_register_write(rt2x00dev, TX0_RF_GAIN_CORRECT, 0x36303636); ++ rt2800_register_write(rt2x00dev, TX0_RF_GAIN_ATTEN, 0x6C6C6B6C); ++ rt2800_register_write(rt2x00dev, TX1_RF_GAIN_ATTEN, 0x6C6C6B6C); ++ } ++} ++ ++static void rt6352_restore_rf_bbp(struct rt2x00_dev *rt2x00dev) ++{ ++ if (rt2x00_has_cap_external_pa(rt2x00dev)) { ++ rt2800_register_write(rt2x00dev, RF_CONTROL3, 0x0); ++ rt2800_register_write(rt2x00dev, RF_BYPASS3, 0x0); ++ } ++ ++ if (rt2800_hw_get_chippkg(rt2x00dev) == 1 && ++ rt2x00_has_cap_external_lna_bg(rt2x00dev)) { ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 14, 0x16); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 17, 0x23); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 18, 0x02); ++ } ++ ++ if (rt2800_hw_get_chippkg(rt2x00dev) == 1 && ++ rt2x00_has_cap_external_pa(rt2x00dev)) ++ { ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 43, 0xD3); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 44, 0xB3); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 45, 0xD5); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 46, 0x27); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 47, 0x6C); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 48, 0xFC); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 49, 0x1F); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 54, 0x27); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 55, 0x66); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 56, 0xFF); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 57, 0x1C); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 58, 0x20); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 59, 0x6B); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 60, 0xF7); ++ rt2800_rfcsr_write_chanreg(rt2x00dev, 61, 0x09); ++ } ++ ++ if (rt2800_hw_get_chippkg(rt2x00dev) == 1 && ++ rt2x00_has_cap_external_lna_bg(rt2x00dev)) { ++ rt2800_bbp_write(rt2x00dev, 75, 0x60); ++ rt2800_bbp_write(rt2x00dev, 76, 0x44); ++ rt2800_bbp_write(rt2x00dev, 79, 0x1C); ++ rt2800_bbp_write(rt2x00dev, 80, 0x0C); ++ rt2800_bbp_write(rt2x00dev, 82, 0xB6); ++ } ++ ++ if (rt2800_hw_get_chippkg(rt2x00dev) == 1 ++ && rt2x00_has_cap_external_pa(rt2x00dev)) { ++ rt2800_register_write(rt2x00dev, TX0_RF_GAIN_CORRECT, 0x3630363A); ++ rt2800_register_write(rt2x00dev, TX0_RF_GAIN_ATTEN, 0x6C6C666C); ++ rt2800_register_write(rt2x00dev, TX1_RF_GAIN_ATTEN, 0x6C6C666C); ++ } ++} ++ ++/* MT7620 PA/LNA initialization before switching channels */ ++static void rt6352_init_palna_stage1(struct rt2x00_dev *rt2x00dev) ++{ ++ if (rt2x00_has_cap_external_pa(rt2x00dev) || ++ rt2x00_has_cap_external_lna_bg(rt2x00dev)) { ++ rt6352_enable_pa_pin(rt2x00dev, 0); ++ rt6352_restore_rf_bbp(rt2x00dev); ++ } ++ ++ rt2800_r_calibration(rt2x00dev); ++} ++ ++/* MT7620 PA/LNA initialization after switching channels */ ++static void rt6352_init_palna_stage2(struct rt2x00_dev *rt2x00dev) ++{ ++ rt2800_rf_self_txdc_cal(rt2x00dev); ++ rt2800_rxdcoc_calibration(rt2x00dev); ++ rt2800_bw_filter_calibration(rt2x00dev, true); ++ rt2800_bw_filter_calibration(rt2x00dev, false); ++ rt2800_loft_iq_calibration(rt2x00dev); ++ ++ /* missing DPD Calibration for devices using internal PA */ ++ ++ rt2800_rxdcoc_calibration(rt2x00dev); ++ rt2800_rxiq_calibration(rt2x00dev); ++ ++ if(rt2x00_has_cap_external_pa(rt2x00dev) || ++ rt2x00_has_cap_external_lna_bg(rt2x00dev)) { ++ rt6352_enable_pa_pin(rt2x00dev, 1); ++ rt6352_init_ext_palna(rt2x00dev); + } + } + +--- a/drivers/net/wireless/ralink/rt2x00/rt2x00.h ++++ b/drivers/net/wireless/ralink/rt2x00/rt2x00.h +@@ -1277,6 +1277,12 @@ rt2x00_has_cap_external_lna_bg(struct rt + } + + static inline bool ++rt2x00_has_cap_external_pa(struct rt2x00_dev *rt2x00dev) ++{ ++ return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_PA_TX0); ++} ++ ++static inline bool + rt2x00_has_cap_double_antenna(struct rt2x00_dev *rt2x00dev) + { + return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_DOUBLE_ANTENNA);