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From: Krishna Kurapati <quic_kriskura@quicinc.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Rob Herring
	<robh+dt@kernel.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Wesley Cheng
	<quic_wcheng@quicinc.com>,
        Konrad Dybcio <konrad.dybcio@linaro.org>,
        "Greg
 Kroah-Hartman" <gregkh@linuxfoundation.org>,
        Conor Dooley
	<conor+dt@kernel.org>,
        Thinh Nguyen <Thinh.Nguyen@synopsys.com>,
        Felipe Balbi
	<balbi@kernel.org>, Johan Hovold <johan@kernel.org>
CC: <devicetree@vger.kernel.org>, <linux-arm-msm@vger.kernel.org>,
        <linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <quic_ppratap@quicinc.com>, <quic_jackp@quicinc.com>,
        Krishna Kurapati
	<quic_kriskura@quicinc.com>
Subject: [PATCH v15 9/9] usb: dwc3: qcom: Add multiport suspend/resume support for wrapper
Date: Fri, 16 Feb 2024 06:27:56 +0530
Message-ID: <20240216005756.762712-10-quic_kriskura@quicinc.com>
In-Reply-To: <20240216005756.762712-1-quic_kriskura@quicinc.com>
References: <20240216005756.762712-1-quic_kriskura@quicinc.com>
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Power event IRQ stat registers are present for each port
connected to controller. Add support for modifying all power event
irq stat registers present in wrapper.

Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
---
 drivers/usb/dwc3/dwc3-qcom.c | 30 +++++++++++++++++++++++-------
 1 file changed, 23 insertions(+), 7 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 572dc3fdae12..e789745a9468 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -37,7 +37,11 @@
 #define PIPE3_PHYSTATUS_SW			BIT(3)
 #define PIPE_UTMI_CLK_DIS			BIT(8)
 
-#define PWR_EVNT_IRQ_STAT_REG			0x58
+#define PWR_EVNT_IRQ1_STAT_REG			0x58
+#define PWR_EVNT_IRQ2_STAT_REG			0x1dc
+#define PWR_EVNT_IRQ3_STAT_REG			0x228
+#define PWR_EVNT_IRQ4_STAT_REG			0x238
+
 #define PWR_EVNT_LPM_IN_L2_MASK			BIT(4)
 #define PWR_EVNT_LPM_OUT_L2_MASK		BIT(5)
 
@@ -109,6 +113,13 @@ struct dwc3_qcom {
 	u8			num_ports;
 };
 
+static const u32 pwr_evnt_irq_stat_reg_offset[DWC3_MAX_PORTS] = {
+	PWR_EVNT_IRQ1_STAT_REG,
+	PWR_EVNT_IRQ2_STAT_REG,
+	PWR_EVNT_IRQ3_STAT_REG,
+	PWR_EVNT_IRQ4_STAT_REG,
+};
+
 static inline void dwc3_qcom_setbits(void __iomem *base, u32 offset, u32 val)
 {
 	u32 reg;
@@ -444,9 +455,11 @@ static int dwc3_qcom_suspend(struct dwc3_qcom *qcom, bool wakeup)
 	if (qcom->is_suspended)
 		return 0;
 
-	val = readl(qcom->qscratch_base + PWR_EVNT_IRQ_STAT_REG);
-	if (!(val & PWR_EVNT_LPM_IN_L2_MASK))
-		dev_err(qcom->dev, "HS-PHY not in L2\n");
+	for (i = 0; i < qcom->num_ports; i++) {
+		val = readl(qcom->qscratch_base + pwr_evnt_irq_stat_reg_offset[i]);
+		if (!(val & PWR_EVNT_LPM_IN_L2_MASK))
+			dev_err(qcom->dev, "Port-%d HS-PHY not in L2\n", i + 1);
+	}
 
 	for (i = qcom->num_clocks - 1; i >= 0; i--)
 		clk_disable_unprepare(qcom->clks[i]);
@@ -491,9 +504,12 @@ static int dwc3_qcom_resume(struct dwc3_qcom *qcom, bool wakeup)
 	if (ret)
 		dev_warn(qcom->dev, "failed to enable interconnect: %d\n", ret);
 
-	/* Clear existing events from PHY related to L2 in/out */
-	dwc3_qcom_setbits(qcom->qscratch_base, PWR_EVNT_IRQ_STAT_REG,
-			  PWR_EVNT_LPM_IN_L2_MASK | PWR_EVNT_LPM_OUT_L2_MASK);
+	for (i = 0; i < qcom->num_ports; i++) {
+		/* Clear existing events from PHY related to L2 in/out */
+		dwc3_qcom_setbits(qcom->qscratch_base,
+				  pwr_evnt_irq_stat_reg_offset[i],
+				  PWR_EVNT_LPM_IN_L2_MASK | PWR_EVNT_LPM_OUT_L2_MASK);
+	}
 
 	qcom->is_suspended = false;
 
-- 
2.34.1