drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c

Source file repositories/reference/linux-study-clean/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
Extension
.c
Size
117265 bytes
Lines
4034
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 (rtlhal->fw_clk_change_in_progress) {
			while (rtlhal->fw_clk_change_in_progress) {
				spin_unlock_bh(&rtlpriv->locks.fw_ps_lock);
				count++;
				udelay(100);
				if (count > 1000)
					goto change_done;
				spin_lock_bh(&rtlpriv->locks.fw_ps_lock);
			}
			spin_unlock_bh(&rtlpriv->locks.fw_ps_lock);
		} else {
			rtlhal->fw_clk_change_in_progress = false;
			spin_unlock_bh(&rtlpriv->locks.fw_ps_lock);
			goto change_done;
		}
	}
change_done:
	if (IS_IN_LOW_POWER_STATE_8821AE(rtlhal->fw_ps_state)) {
		rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_SET_RPWM,
					(u8 *)(&rpwm_val));
		if (FW_PS_IS_ACK(rpwm_val)) {
			isr_regaddr = REG_HISR;
			content = rtl_read_dword(rtlpriv, isr_regaddr);
			while (!(content & IMR_CPWM) && (count < 500)) {
				udelay(50);
				count++;
				content = rtl_read_dword(rtlpriv, isr_regaddr);
			}

			if (content & IMR_CPWM) {
				rtl_write_word(rtlpriv, isr_regaddr, 0x0100);
				rtlhal->fw_ps_state = FW_PS_STATE_RF_ON_8821AE;
				rtl_dbg(rtlpriv, COMP_POWER, DBG_LOUD,
					"Receive CPWM INT!!! Set rtlhal->FwPSState = %X\n",
					rtlhal->fw_ps_state);
			}
		}

		spin_lock_bh(&rtlpriv->locks.fw_ps_lock);
		rtlhal->fw_clk_change_in_progress = false;
		spin_unlock_bh(&rtlpriv->locks.fw_ps_lock);
		if (b_schedule_timer)
			mod_timer(&rtlpriv->works.fw_clockoff_timer,
				  jiffies + MSECS(10));
	} else  {
		spin_lock_bh(&rtlpriv->locks.fw_ps_lock);
		rtlhal->fw_clk_change_in_progress = false;
		spin_unlock_bh(&rtlpriv->locks.fw_ps_lock);
	}
}

static void _rtl8821ae_set_fw_clock_off(struct ieee80211_hw *hw,
					u8 rpwm_val)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
	struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
	struct rtl8192_tx_ring *ring;
	enum rf_pwrstate rtstate;
	bool b_schedule_timer = false;
	u8 queue;

	if (!rtlhal->fw_ready)
		return;
	if (!rtlpriv->psc.fw_current_inpsmode)
		return;
	if (!rtlhal->allow_sw_to_change_hwclc)
		return;
	rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_RF_STATE, (u8 *)(&rtstate));
	if (rtstate == ERFOFF || rtlpriv->psc.inactive_pwrstate == ERFOFF)
		return;

	for (queue = 0; queue < RTL_PCI_MAX_TX_QUEUE_COUNT; queue++) {
		ring = &rtlpci->tx_ring[queue];
		if (skb_queue_len(&ring->queue)) {
			b_schedule_timer = true;
			break;
		}
	}

	if (b_schedule_timer) {
		mod_timer(&rtlpriv->works.fw_clockoff_timer,
			  jiffies + MSECS(10));
		return;
	}

	if (FW_PS_STATE(rtlhal->fw_ps_state) !=
		FW_PS_STATE_RF_OFF_LOW_PWR_8821AE) {
		spin_lock_bh(&rtlpriv->locks.fw_ps_lock);
		if (!rtlhal->fw_clk_change_in_progress) {

Annotation

Implementation Notes