drivers/net/wireless/mediatek/mt76/mt76x2/usb_phy.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/mediatek/mt76/mt76x2/usb_phy.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/mediatek/mt76/mt76x2/usb_phy.c
Extension
.c
Size
5518 bytes
Lines
202
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (freq1 > freq) {
			bw_index = 1;
			ch_group_index = 0;
		} else {
			bw_index = 3;
			ch_group_index = 1;
		}
		channel += 2 - ch_group_index * 4;
		break;
	case NL80211_CHAN_WIDTH_80:
		ch_group_index = (freq - freq1 + 30) / 20;
		if (WARN_ON(ch_group_index < 0 || ch_group_index > 3))
			ch_group_index = 0;
		bw = 2;
		bw_index = ch_group_index;
		channel += 6 - ch_group_index * 4;
		break;
	default:
		bw = 0;
		bw_index = 0;
		ch_group_index = 0;
		break;
	}

	mt76x2_read_rx_gain(dev);
	mt76x2_phy_set_txpower_regs(dev, chan->band);
	mt76x2_configure_tx_delay(dev, chan->band, bw);
	mt76x2_phy_set_txpower(dev);

	mt76x02_phy_set_band(dev, chan->band, ch_group_index & 1);
	mt76x02_phy_set_bw(dev, chandef->width, ch_group_index);

	mt76_rmw(dev, MT_EXT_CCA_CFG,
		 (MT_EXT_CCA_CFG_CCA0 |
		  MT_EXT_CCA_CFG_CCA1 |
		  MT_EXT_CCA_CFG_CCA2 |
		  MT_EXT_CCA_CFG_CCA3 |
		  MT_EXT_CCA_CFG_CCA_MASK),
		 ext_cca_chan[ch_group_index]);

	ret = mt76x2_mcu_set_channel(dev, channel, bw, bw_index, scan);
	if (ret)
		return ret;

	mt76x2_mcu_init_gain(dev, channel, dev->cal.rx.mcu_gain, true);

	/* Enable LDPC Rx */
	if (mt76xx_rev(dev) >= MT76XX_REV_E3)
		mt76_set(dev, MT_BBP(RXO, 13), BIT(10));

	if (!dev->cal.init_cal_done) {
		u8 val = mt76x02_eeprom_get(dev, MT_EE_BT_RCAL_RESULT);

		if (val != 0xff)
			mt76x02_mcu_calibrate(dev, MCU_CAL_R, 0);
	}

	mt76x02_mcu_calibrate(dev, MCU_CAL_RXDCOC, channel);

	/* Rx LPF calibration */
	if (!dev->cal.init_cal_done)
		mt76x02_mcu_calibrate(dev, MCU_CAL_RC, 0);
	dev->cal.init_cal_done = true;

	mt76_wr(dev, MT_BBP(AGC, 61), 0xff64a4e2);
	mt76_wr(dev, MT_BBP(AGC, 7), 0x08081010);
	mt76_wr(dev, MT_BBP(AGC, 11), 0x00000404);
	mt76_wr(dev, MT_BBP(AGC, 2), 0x00007070);
	mt76_wr(dev, MT_TXOP_CTRL_CFG, 0X04101b3f);

	mt76_set(dev, MT_BBP(TXO, 4), BIT(25));
	mt76_set(dev, MT_BBP(RXO, 13), BIT(8));

	if (scan)
		return 0;

	mt76x2u_phy_channel_calibrate(dev, true);
	mt76x02_init_agc_gain(dev);

	if (mt76x2_tssi_enabled(dev)) {
		/* init default values for temp compensation */
		mt76_rmw_field(dev, MT_TX_ALC_CFG_1, MT_TX_ALC_CFG_1_TEMP_COMP,
			       0x38);
		mt76_rmw_field(dev, MT_TX_ALC_CFG_2, MT_TX_ALC_CFG_2_TEMP_COMP,
			       0x38);

		/* init tssi calibration */
		if (!mt76x2_channel_silent(dev)) {
			struct ieee80211_channel *chan;
			u32 flag = 0;

Annotation

Implementation Notes