if (rt2x00dev->curr_band == IEEE80211_BAND_2GHZ) {
                if (rt2x00_rt(rt2x00dev, RT3070) ||
                    rt2x00_rt(rt2x00dev, RT3071) ||
-                   rt2x00_rt(rt2x00dev, RT3090))
+                   rt2x00_rt(rt2x00dev, RT3090) ||
+                   rt2x00_rt(rt2x00dev, RT3390))
                        return 0x1c + (2 * rt2x00dev->lna_gain);
                else
                        return 0x2e + rt2x00dev->lna_gain;
        rt2800_register_write(rt2x00dev, BKOFF_SLOT_CFG, reg);
 
        if (rt2x00_rt(rt2x00dev, RT3071) ||
-           rt2x00_rt(rt2x00dev, RT3090)) {
+           rt2x00_rt(rt2x00dev, RT3090) ||
+           rt2x00_rt(rt2x00dev, RT3390)) {
                rt2800_register_write(rt2x00dev, TX_SW_CFG0, 0x00000400);
                rt2800_register_write(rt2x00dev, TX_SW_CFG1, 0x00000000);
                if (rt2x00_rt_rev_lt(rt2x00dev, RT3071, REV_RT3071E) ||
-                   rt2x00_rt_rev_lt(rt2x00dev, RT3090, REV_RT3090E)) {
+                   rt2x00_rt_rev_lt(rt2x00dev, RT3090, REV_RT3090E) ||
+                   rt2x00_rt_rev_lt(rt2x00dev, RT3390, REV_RT3390E)) {
                        rt2x00_eeprom_read(rt2x00dev, EEPROM_NIC, &eeprom);
                        if (rt2x00_get_field16(eeprom, EEPROM_NIC_DAC_TEST))
                                rt2800_register_write(rt2x00dev, TX_SW_CFG2,
 
        if (rt2x00_rt(rt2x00dev, RT3070) ||
            rt2x00_rt(rt2x00dev, RT3071) ||
-           rt2x00_rt(rt2x00dev, RT3090)) {
+           rt2x00_rt(rt2x00dev, RT3090) ||
+           rt2x00_rt(rt2x00dev, RT3390)) {
                rt2800_bbp_write(rt2x00dev, 79, 0x13);
                rt2800_bbp_write(rt2x00dev, 80, 0x05);
                rt2800_bbp_write(rt2x00dev, 81, 0x33);
 
        if (rt2x00_rt_rev_gte(rt2x00dev, RT3070, REV_RT3070F) ||
            rt2x00_rt_rev_gte(rt2x00dev, RT3071, REV_RT3071E) ||
-           rt2x00_rt_rev_gte(rt2x00dev, RT3090, REV_RT3090E))
+           rt2x00_rt_rev_gte(rt2x00dev, RT3090, REV_RT3090E) ||
+           rt2x00_rt_rev_gte(rt2x00dev, RT3390, REV_RT3390E))
                rt2800_bbp_write(rt2x00dev, 103, 0xc0);
        else
                rt2800_bbp_write(rt2x00dev, 103, 0x00);
        rt2800_bbp_write(rt2x00dev, 106, 0x35);
 
        if (rt2x00_rt(rt2x00dev, RT3071) ||
-           rt2x00_rt(rt2x00dev, RT3090)) {
+           rt2x00_rt(rt2x00dev, RT3090) ||
+           rt2x00_rt(rt2x00dev, RT3390)) {
                rt2800_bbp_read(rt2x00dev, 138, &value);
 
                rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &eeprom);
 
        if (!rt2x00_rt(rt2x00dev, RT3070) &&
            !rt2x00_rt(rt2x00dev, RT3071) &&
-           !rt2x00_rt(rt2x00dev, RT3090))
+           !rt2x00_rt(rt2x00dev, RT3090) &&
+           !rt2x00_rt(rt2x00dev, RT3390))
                return 0;
 
        /*
                rt2800_rfcsr_write(rt2x00dev, 24, 0x16);
                rt2800_rfcsr_write(rt2x00dev, 25, 0x01);
                rt2800_rfcsr_write(rt2x00dev, 29, 0x1f);
+       } else if (rt2x00_rt(rt2x00dev, RT3390)) {
+               rt2800_rfcsr_write(rt2x00dev, 0, 0xa0);
+               rt2800_rfcsr_write(rt2x00dev, 1, 0xe1);
+               rt2800_rfcsr_write(rt2x00dev, 2, 0xf1);
+               rt2800_rfcsr_write(rt2x00dev, 3, 0x62);
+               rt2800_rfcsr_write(rt2x00dev, 4, 0x40);
+               rt2800_rfcsr_write(rt2x00dev, 5, 0x8b);
+               rt2800_rfcsr_write(rt2x00dev, 6, 0x42);
+               rt2800_rfcsr_write(rt2x00dev, 7, 0x34);
+               rt2800_rfcsr_write(rt2x00dev, 8, 0x00);
+               rt2800_rfcsr_write(rt2x00dev, 9, 0xc0);
+               rt2800_rfcsr_write(rt2x00dev, 10, 0x61);
+               rt2800_rfcsr_write(rt2x00dev, 11, 0x21);
+               rt2800_rfcsr_write(rt2x00dev, 12, 0x3b);
+               rt2800_rfcsr_write(rt2x00dev, 13, 0xe0);
+               rt2800_rfcsr_write(rt2x00dev, 14, 0x90);
+               rt2800_rfcsr_write(rt2x00dev, 15, 0x53);
+               rt2800_rfcsr_write(rt2x00dev, 16, 0xe0);
+               rt2800_rfcsr_write(rt2x00dev, 17, 0x94);
+               rt2800_rfcsr_write(rt2x00dev, 18, 0x5c);
+               rt2800_rfcsr_write(rt2x00dev, 19, 0x4a);
+               rt2800_rfcsr_write(rt2x00dev, 20, 0xb2);
+               rt2800_rfcsr_write(rt2x00dev, 21, 0xf6);
+               rt2800_rfcsr_write(rt2x00dev, 22, 0x00);
+               rt2800_rfcsr_write(rt2x00dev, 23, 0x14);
+               rt2800_rfcsr_write(rt2x00dev, 24, 0x08);
+               rt2800_rfcsr_write(rt2x00dev, 25, 0x3d);
+               rt2800_rfcsr_write(rt2x00dev, 26, 0x85);
+               rt2800_rfcsr_write(rt2x00dev, 27, 0x00);
+               rt2800_rfcsr_write(rt2x00dev, 28, 0x41);
+               rt2800_rfcsr_write(rt2x00dev, 29, 0x8f);
+               rt2800_rfcsr_write(rt2x00dev, 30, 0x20);
+               rt2800_rfcsr_write(rt2x00dev, 31, 0x0f);
        }
 
        if (rt2x00_rt_rev_lt(rt2x00dev, RT3070, REV_RT3070F)) {
                                rt2x00_set_field32(®, LDO_CFG0_LDO_CORE_VLEVEL, 0);
                }
                rt2800_register_write(rt2x00dev, LDO_CFG0, reg);
+       } else if (rt2x00_rt(rt2x00dev, RT3390)) {
+               rt2800_register_read(rt2x00dev, GPIO_SWITCH, ®);
+               rt2x00_set_field32(®, GPIO_SWITCH_5, 0);
+               rt2800_register_write(rt2x00dev, GPIO_SWITCH, reg);
        }
 
        /*
                rt2x00dev->calibration[1] =
                        rt2800_init_rx_filter(rt2x00dev, true, 0x27, 0x19);
        } else if (rt2x00_rt(rt2x00dev, RT3071) ||
-                  rt2x00_rt(rt2x00dev, RT3090)) {
+                  rt2x00_rt(rt2x00dev, RT3090) ||
+                  rt2x00_rt(rt2x00dev, RT3390)) {
                rt2x00dev->calibration[0] =
                        rt2800_init_rx_filter(rt2x00dev, false, 0x07, 0x13);
                rt2x00dev->calibration[1] =
 
        if (rt2x00_rt_rev_lt(rt2x00dev, RT3070, REV_RT3070F) ||
            rt2x00_rt_rev_lt(rt2x00dev, RT3071, REV_RT3071E) ||
-           rt2x00_rt_rev_lt(rt2x00dev, RT3090, REV_RT3090E))
+           rt2x00_rt_rev_lt(rt2x00dev, RT3090, REV_RT3090E) ||
+           rt2x00_rt_rev_lt(rt2x00dev, RT3390, REV_RT3390E))
                rt2800_rfcsr_write(rt2x00dev, 27, 0x03);
 
        rt2800_register_read(rt2x00dev, OPT_14_CSR, ®);
        rt2800_rfcsr_read(rt2x00dev, 17, &rfcsr);
        rt2x00_set_field8(&rfcsr, RFCSR17_TX_LO1_EN, 0);
        if (rt2x00_rt_rev_lt(rt2x00dev, RT3071, REV_RT3071E) ||
-           rt2x00_rt_rev_lt(rt2x00dev, RT3090, REV_RT3090E)) {
+           rt2x00_rt_rev_lt(rt2x00dev, RT3090, REV_RT3090E) ||
+           rt2x00_rt_rev_lt(rt2x00dev, RT3390, REV_RT3390E)) {
                rt2x00_eeprom_read(rt2x00dev, EEPROM_NIC, &eeprom);
                if (rt2x00_get_field16(eeprom, EEPROM_NIC_EXTERNAL_LNA_BG))
                        rt2x00_set_field8(&rfcsr, RFCSR17_R, 1);
        }
 
        if (rt2x00_rt(rt2x00dev, RT3071) ||
-           rt2x00_rt(rt2x00dev, RT3090)) {
+           rt2x00_rt(rt2x00dev, RT3090) ||
+           rt2x00_rt(rt2x00dev, RT3390)) {
                rt2800_rfcsr_read(rt2x00dev, 1, &rfcsr);
                rt2x00_set_field8(&rfcsr, RFCSR1_RF_BLOCK_EN, 1);
                rt2x00_set_field8(&rfcsr, RFCSR1_RX0_PD, 0);