diff mbox series

[v17,7/9] usb: dwc3: qcom: Refactor IRQ handling in glue driver

Message ID 20240326102809.2940123-8-quic_kriskura@quicinc.com (mailing list archive)
State Superseded
Headers show
Series Add multiport support for DWC3 controllers | expand

Commit Message

Krishna Kurapati March 26, 2024, 10:28 a.m. UTC 
On multiport supported controllers, each port has its own DP/DM
and SS (if super speed capable) interrupts. As per the bindings,
their interrupt names differ from standard ones having "_x" added
as suffix (x indicates port number). Identify from the interrupt
names whether the controller is a multiport controller or not.
Refactor dwc3_qcom_setup_irq() call to parse multiport interrupts
along with non-multiport ones accordingly..

Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/usb/dwc3/dwc3-qcom.c | 137 ++++++++++++++++++++++++++---------
 1 file changed, 103 insertions(+), 34 deletions(-)

Comments

Johan Hovold March 26, 2024, 10:44 a.m. UTC | #1 
On Tue, Mar 26, 2024 at 03:58:07PM +0530, Krishna Kurapati wrote:
> On multiport supported controllers, each port has its own DP/DM
> and SS (if super speed capable) interrupts. As per the bindings,
> their interrupt names differ from standard ones having "_x" added
> as suffix (x indicates port number). Identify from the interrupt
> names whether the controller is a multiport controller or not.
> Refactor dwc3_qcom_setup_irq() call to parse multiport interrupts
> along with non-multiport ones accordingly..
> 
> Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
> Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
> ---
>  drivers/usb/dwc3/dwc3-qcom.c | 137 ++++++++++++++++++++++++++---------
>  1 file changed, 103 insertions(+), 34 deletions(-) 

> -static int dwc3_qcom_setup_irq(struct platform_device *pdev)
> +static int dwc3_qcom_setup_port_irq(struct platform_device *pdev, int port_num, bool is_multiport)

Here you use "port_num", when it's really a (zero-based) port index.

Please change to "port_index".

>  {
>  	struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
> +	const char *irq_name;
>  	int irq;
>  	int ret;
>  
> -	irq = platform_get_irq_byname_optional(pdev, "qusb2_phy");
> +	if (is_multiport)
> +		irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "dp_hs_phy_%d", port_num + 1);
> +	else
> +		irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "dp_hs_phy_irq");
> +	if (!irq_name)
> +		return -ENOMEM;

> +static int dwc3_qcom_find_num_ports(struct platform_device *pdev)
> +{
> +	char irq_name[14];
> +	int port_index;
> +	int irq;
> +
> +	irq = platform_get_irq_byname_optional(pdev, "dp_hs_phy_1");
> +	if (irq <= 0)
> +		return 1;
> +
> +	for (port_index = 2; port_index <= DWC3_MAX_PORTS; port_index++) {

And here you use port_index, when it's really a one-based port number.

I explicitly used "port" when we discussed the update here for this
reason ("port_num" works too).

Please fix this last thing in a v18 and we're good to go.

> +		sprintf(irq_name, "dp_hs_phy_%d", port_index);
> +
> +		irq = platform_get_irq_byname_optional(pdev, irq_name);
> +		if (irq <= 0)
> +			return port_index - 1;
> +	}
> +
> +	return DWC3_MAX_PORTS;
> +}

Johan
diff mbox series

Patch

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index cae5dab8fcfc..38452104337c 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -52,6 +52,13 @@ 
 #define APPS_USB_AVG_BW 0
 #define APPS_USB_PEAK_BW MBps_to_icc(40)
 
+struct dwc3_qcom_port {
+	int			qusb2_phy_irq;
+	int			dp_hs_phy_irq;
+	int			dm_hs_phy_irq;
+	int			ss_phy_irq;
+};
+
 struct dwc3_qcom {
 	struct device		*dev;
 	void __iomem		*qscratch_base;
@@ -59,11 +66,8 @@  struct dwc3_qcom {
 	struct clk		**clks;
 	int			num_clocks;
 	struct reset_control	*resets;
-
-	int			qusb2_phy_irq;
-	int			dp_hs_phy_irq;
-	int			dm_hs_phy_irq;
-	int			ss_phy_irq;
+	struct dwc3_qcom_port	ports[DWC3_MAX_PORTS];
+	u8			num_ports;
 	enum usb_device_speed	usb2_speed;
 
 	struct extcon_dev	*edev;
@@ -354,24 +358,24 @@  static void dwc3_qcom_disable_wakeup_irq(int irq)
 
 static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom)
 {
-	dwc3_qcom_disable_wakeup_irq(qcom->qusb2_phy_irq);
+	dwc3_qcom_disable_wakeup_irq(qcom->ports[0].qusb2_phy_irq);
 
 	if (qcom->usb2_speed == USB_SPEED_LOW) {
-		dwc3_qcom_disable_wakeup_irq(qcom->dm_hs_phy_irq);
+		dwc3_qcom_disable_wakeup_irq(qcom->ports[0].dm_hs_phy_irq);
 	} else if ((qcom->usb2_speed == USB_SPEED_HIGH) ||
 			(qcom->usb2_speed == USB_SPEED_FULL)) {
-		dwc3_qcom_disable_wakeup_irq(qcom->dp_hs_phy_irq);
+		dwc3_qcom_disable_wakeup_irq(qcom->ports[0].dp_hs_phy_irq);
 	} else {
-		dwc3_qcom_disable_wakeup_irq(qcom->dp_hs_phy_irq);
-		dwc3_qcom_disable_wakeup_irq(qcom->dm_hs_phy_irq);
+		dwc3_qcom_disable_wakeup_irq(qcom->ports[0].dp_hs_phy_irq);
+		dwc3_qcom_disable_wakeup_irq(qcom->ports[0].dm_hs_phy_irq);
 	}
 
-	dwc3_qcom_disable_wakeup_irq(qcom->ss_phy_irq);
+	dwc3_qcom_disable_wakeup_irq(qcom->ports[0].ss_phy_irq);
 }
 
 static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom)
 {
-	dwc3_qcom_enable_wakeup_irq(qcom->qusb2_phy_irq, 0);
+	dwc3_qcom_enable_wakeup_irq(qcom->ports[0].qusb2_phy_irq, 0);
 
 	/*
 	 * Configure DP/DM line interrupts based on the USB2 device attached to
@@ -383,20 +387,20 @@  static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom)
 	 */
 
 	if (qcom->usb2_speed == USB_SPEED_LOW) {
-		dwc3_qcom_enable_wakeup_irq(qcom->dm_hs_phy_irq,
-						IRQ_TYPE_EDGE_FALLING);
+		dwc3_qcom_enable_wakeup_irq(qcom->ports[0].dm_hs_phy_irq,
+					    IRQ_TYPE_EDGE_FALLING);
 	} else if ((qcom->usb2_speed == USB_SPEED_HIGH) ||
 			(qcom->usb2_speed == USB_SPEED_FULL)) {
-		dwc3_qcom_enable_wakeup_irq(qcom->dp_hs_phy_irq,
-						IRQ_TYPE_EDGE_FALLING);
+		dwc3_qcom_enable_wakeup_irq(qcom->ports[0].dp_hs_phy_irq,
+					    IRQ_TYPE_EDGE_FALLING);
 	} else {
-		dwc3_qcom_enable_wakeup_irq(qcom->dp_hs_phy_irq,
-						IRQ_TYPE_EDGE_RISING);
-		dwc3_qcom_enable_wakeup_irq(qcom->dm_hs_phy_irq,
-						IRQ_TYPE_EDGE_RISING);
+		dwc3_qcom_enable_wakeup_irq(qcom->ports[0].dp_hs_phy_irq,
+					    IRQ_TYPE_EDGE_RISING);
+		dwc3_qcom_enable_wakeup_irq(qcom->ports[0].dm_hs_phy_irq,
+					    IRQ_TYPE_EDGE_RISING);
 	}
 
-	dwc3_qcom_enable_wakeup_irq(qcom->ss_phy_irq, 0);
+	dwc3_qcom_enable_wakeup_irq(qcom->ports[0].ss_phy_irq, 0);
 }
 
 static int dwc3_qcom_suspend(struct dwc3_qcom *qcom, bool wakeup)
@@ -517,42 +521,107 @@  static int dwc3_qcom_request_irq(struct dwc3_qcom *qcom, int irq,
 	return ret;
 }
 
-static int dwc3_qcom_setup_irq(struct platform_device *pdev)
+static int dwc3_qcom_setup_port_irq(struct platform_device *pdev, int port_num, bool is_multiport)
 {
 	struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
+	const char *irq_name;
 	int irq;
 	int ret;
 
-	irq = platform_get_irq_byname_optional(pdev, "qusb2_phy");
+	if (is_multiport)
+		irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "dp_hs_phy_%d", port_num + 1);
+	else
+		irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "dp_hs_phy_irq");
+	if (!irq_name)
+		return -ENOMEM;
+
+	irq = platform_get_irq_byname_optional(pdev, irq_name);
 	if (irq > 0) {
-		ret = dwc3_qcom_request_irq(qcom, irq, "qusb2_phy");
+		ret = dwc3_qcom_request_irq(qcom, irq, irq_name);
 		if (ret)
 			return ret;
-		qcom->qusb2_phy_irq = irq;
+		qcom->ports[port_num].dp_hs_phy_irq = irq;
 	}
 
-	irq = platform_get_irq_byname_optional(pdev, "dp_hs_phy_irq");
+	if (is_multiport)
+		irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "dm_hs_phy_%d", port_num + 1);
+	else
+		irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "dm_hs_phy_irq");
+	if (!irq_name)
+		return -ENOMEM;
+
+	irq = platform_get_irq_byname_optional(pdev, irq_name);
 	if (irq > 0) {
-		ret = dwc3_qcom_request_irq(qcom, irq, "dp_hs_phy_irq");
+		ret = dwc3_qcom_request_irq(qcom, irq, irq_name);
 		if (ret)
 			return ret;
-		qcom->dp_hs_phy_irq = irq;
+		qcom->ports[port_num].dm_hs_phy_irq = irq;
 	}
 
-	irq = platform_get_irq_byname_optional(pdev, "dm_hs_phy_irq");
+	if (is_multiport)
+		irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "ss_phy_%d", port_num + 1);
+	else
+		irq_name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "ss_phy_irq");
+	if (!irq_name)
+		return -ENOMEM;
+
+	irq = platform_get_irq_byname_optional(pdev, irq_name);
 	if (irq > 0) {
-		ret = dwc3_qcom_request_irq(qcom, irq, "dm_hs_phy_irq");
+		ret = dwc3_qcom_request_irq(qcom, irq, irq_name);
 		if (ret)
 			return ret;
-		qcom->dm_hs_phy_irq = irq;
+		qcom->ports[port_num].ss_phy_irq = irq;
 	}
 
-	irq = platform_get_irq_byname_optional(pdev, "ss_phy_irq");
+	if (is_multiport)
+		return 0;
+
+	irq = platform_get_irq_byname_optional(pdev, "qusb2_phy");
 	if (irq > 0) {
-		ret = dwc3_qcom_request_irq(qcom, irq, "ss_phy_irq");
+		ret = dwc3_qcom_request_irq(qcom, irq, "qusb2_phy");
+		if (ret)
+			return ret;
+		qcom->ports[port_num].qusb2_phy_irq = irq;
+	}
+
+	return 0;
+}
+
+static int dwc3_qcom_find_num_ports(struct platform_device *pdev)
+{
+	char irq_name[14];
+	int port_index;
+	int irq;
+
+	irq = platform_get_irq_byname_optional(pdev, "dp_hs_phy_1");
+	if (irq <= 0)
+		return 1;
+
+	for (port_index = 2; port_index <= DWC3_MAX_PORTS; port_index++) {
+		sprintf(irq_name, "dp_hs_phy_%d", port_index);
+
+		irq = platform_get_irq_byname_optional(pdev, irq_name);
+		if (irq <= 0)
+			return port_index - 1;
+	}
+
+	return DWC3_MAX_PORTS;
+}
+
+static int dwc3_qcom_setup_irq(struct platform_device *pdev)
+{
+	struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
+	bool is_multiport;
+	int ret;
+	int i;
+
+	qcom->num_ports = dwc3_qcom_find_num_ports(pdev);
+	is_multiport = (qcom->num_ports > 1);
+
+	for (i = 0; i < qcom->num_ports; i++) {
+		ret = dwc3_qcom_setup_port_irq(pdev, i, is_multiport);
 		if (ret)
 			return ret;
-		qcom->ss_phy_irq = irq;
 	}
 
 	return 0;