disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/usb/dwc3/drd.c
..
..
@@ -1,8 +1,8 @@
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 // SPDX-License-Identifier: GPL-2.0
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-/**
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+/*
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  * drd.c - DesignWare USB3 DRD Controller Dual-role support
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  *
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- * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com
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+ * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com
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  *
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  * Authors: Roger Quadros <rogerq@ti.com>
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  */
..
..
@@ -56,7 +56,7 @@
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 	spin_lock(&dwc->lock);
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 	if (dwc->otg_restart_host) {
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 		dwc3_otg_host_init(dwc);
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-		dwc->otg_restart_host = 0;
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+		dwc->otg_restart_host = false;
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 	}
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61
 
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 	spin_unlock(&dwc->lock);
..
..
@@ -82,7 +82,7 @@
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82
 
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 		if (dwc->current_otg_role == DWC3_OTG_ROLE_HOST &&
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 		    !(reg & DWC3_OEVT_DEVICEMODE))
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-			dwc->otg_restart_host = 1;
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+			dwc->otg_restart_host = true;
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 		dwc3_writel(dwc->regs, DWC3_OEVT, reg);
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 		ret = IRQ_WAKE_THREAD;
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 	}
..
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@@ -139,14 +139,14 @@
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 	struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
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 	int irq;
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-	irq = platform_get_irq_byname(dwc3_pdev, "otg");
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+	irq = platform_get_irq_byname_optional(dwc3_pdev, "otg");
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 	if (irq > 0)
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 		goto out;
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 	if (irq == -EPROBE_DEFER)
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 		goto out;
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-	irq = platform_get_irq_byname(dwc3_pdev, "dwc_usb3");
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+	irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3");
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 	if (irq > 0)
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 		goto out;
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152
 
..
..
@@ -156,9 +156,6 @@
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 	irq = platform_get_irq(dwc3_pdev, 0);
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 	if (irq > 0)
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 		goto out;
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-
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-	if (irq != -EPROBE_DEFER)
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-		dev_err(dwc->dev, "missing OTG IRQ\n");
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159
 
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 	if (!irq)
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 		irq = -EINVAL;
..
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@@ -423,6 +420,12 @@
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 		id = extcon_get_state(dwc->edev, EXTCON_USB_HOST);
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 		if (id < 0)
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 			id = 0;
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+
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+#if defined(CONFIG_ARCH_ROCKCHIP) && defined(CONFIG_NO_GKI)
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+		if (extcon_get_state(dwc->edev, EXTCON_USB))
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+			dwc->desired_role_sw_mode = USB_DR_MODE_PERIPHERAL;
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+#endif
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+
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 		dwc3_set_mode(dwc, id ?
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 			      DWC3_GCTL_PRTCAP_HOST :
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 			      DWC3_GCTL_PRTCAP_DEVICE);
..
..
@@ -434,6 +437,15 @@
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 {
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 	struct dwc3 *dwc = container_of(nb, struct dwc3, edev_nb);
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439
 
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+#if defined(CONFIG_ARCH_ROCKCHIP) && defined(CONFIG_NO_GKI)
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+	if (extcon_get_state(dwc->edev, EXTCON_USB))
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+		dwc->desired_role_sw_mode = USB_DR_MODE_PERIPHERAL;
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+	else if (extcon_get_state(dwc->edev, EXTCON_USB_HOST))
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+		dwc->desired_role_sw_mode = USB_DR_MODE_HOST;
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+	else
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+		dwc->desired_role_sw_mode = USB_DR_MODE_UNKNOWN;
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+#endif
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+
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 	dwc3_set_mode(dwc, event ?
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 		      DWC3_GCTL_PRTCAP_HOST :
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 		      DWC3_GCTL_PRTCAP_DEVICE);
..
..
@@ -444,8 +456,8 @@
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 static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc)
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 {
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 	struct device *dev = dwc->dev;
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-	struct device_node *np_phy, *np_conn;
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-	struct extcon_dev *edev;
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+	struct device_node *np_phy;
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+	struct extcon_dev *edev = NULL;
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 	const char *name;
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462
 
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 	if (device_property_read_bool(dev, "extcon"))
..
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@@ -465,23 +477,127 @@
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 		return edev;
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 	}
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479
 
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+	/*
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+	 * Try to get an extcon device from the USB PHY controller's "port"
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+	 * node. Check if it has the "port" node first, to avoid printing the
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+	 * error message from underlying code, as it's a valid case: extcon
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+	 * device (and "port" node) may be missing in case of "usb-role-switch"
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+	 * or OTG mode.
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+	 */
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 	np_phy = of_parse_phandle(dev->of_node, "phys", 0);
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-	np_conn = of_graph_get_remote_node(np_phy, -1, -1);
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+	if (of_graph_is_present(np_phy)) {
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+		struct device_node *np_conn;
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490
 
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-	if (np_conn)
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-		edev = extcon_find_edev_by_node(np_conn);
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-	else
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-		edev = NULL;
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-
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-	of_node_put(np_conn);
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+		np_conn = of_graph_get_remote_node(np_phy, -1, -1);
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+		if (np_conn)
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+			edev = extcon_find_edev_by_node(np_conn);
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+		of_node_put(np_conn);
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+	}
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 	of_node_put(np_phy);
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497
 
479
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 	return edev;
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499
 }
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500
 
501
+#if IS_ENABLED(CONFIG_USB_ROLE_SWITCH)
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+#define ROLE_SWITCH 1
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+static int dwc3_usb_role_switch_set(struct usb_role_switch *sw,
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+				    enum usb_role role)
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+{
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+	struct dwc3 *dwc = usb_role_switch_get_drvdata(sw);
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+	u32 mode;
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+
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+#if defined(CONFIG_ARCH_ROCKCHIP) && defined(CONFIG_NO_GKI)
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+	dwc->desired_role_sw_mode = role;
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+	phy_set_mode_ext(dwc->usb2_generic_phy, PHY_MODE_USB_OTG, role);
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+#endif
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+
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+	switch (role) {
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+	case USB_ROLE_HOST:
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+		mode = DWC3_GCTL_PRTCAP_HOST;
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+		break;
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+	case USB_ROLE_DEVICE:
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+		mode = DWC3_GCTL_PRTCAP_DEVICE;
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+		break;
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+	default:
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+		if (dwc->role_switch_default_mode == USB_DR_MODE_HOST)
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+			mode = DWC3_GCTL_PRTCAP_HOST;
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+		else
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+			mode = DWC3_GCTL_PRTCAP_DEVICE;
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+		break;
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+	}
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+
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+	dwc3_set_mode(dwc, mode);
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+	return 0;
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+}
532
+
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+static enum usb_role dwc3_usb_role_switch_get(struct usb_role_switch *sw)
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+{
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+	struct dwc3 *dwc = usb_role_switch_get_drvdata(sw);
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+	unsigned long flags;
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+	enum usb_role role;
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+
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+	spin_lock_irqsave(&dwc->lock, flags);
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+	switch (dwc->current_dr_role) {
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+	case DWC3_GCTL_PRTCAP_HOST:
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+		role = USB_ROLE_HOST;
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+		break;
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+	case DWC3_GCTL_PRTCAP_DEVICE:
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+		role = USB_ROLE_DEVICE;
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+		break;
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+	case DWC3_GCTL_PRTCAP_OTG:
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+		role = dwc->current_otg_role;
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+		break;
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+	default:
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+		if (dwc->role_switch_default_mode == USB_DR_MODE_HOST)
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+			role = USB_ROLE_HOST;
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+		else
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+			role = USB_ROLE_DEVICE;
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+		break;
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+	}
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+	spin_unlock_irqrestore(&dwc->lock, flags);
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+	return role;
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+}
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+
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+static int dwc3_setup_role_switch(struct dwc3 *dwc)
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+{
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+	struct usb_role_switch_desc dwc3_role_switch = {NULL};
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+	const char *str;
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+	u32 mode;
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+	int ret;
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+
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+	ret = device_property_read_string(dwc->dev, "role-switch-default-mode",
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+					  &str);
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+	if (ret >= 0  && !strncmp(str, "host", strlen("host"))) {
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+		dwc->role_switch_default_mode = USB_DR_MODE_HOST;
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+		mode = DWC3_GCTL_PRTCAP_HOST;
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+	} else {
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+		dwc->role_switch_default_mode = USB_DR_MODE_PERIPHERAL;
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+		mode = DWC3_GCTL_PRTCAP_DEVICE;
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+	}
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+
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+	dwc3_role_switch.fwnode = dev_fwnode(dwc->dev);
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+	dwc3_role_switch.set = dwc3_usb_role_switch_set;
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+	dwc3_role_switch.get = dwc3_usb_role_switch_get;
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+	dwc3_role_switch.driver_data = dwc;
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+	dwc->role_sw = usb_role_switch_register(dwc->dev, &dwc3_role_switch);
583
+	if (IS_ERR(dwc->role_sw))
584
+		return PTR_ERR(dwc->role_sw);
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+
586
+	dwc3_set_mode(dwc, mode);
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+	return 0;
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+}
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+#else
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+#define ROLE_SWITCH 0
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+#define dwc3_setup_role_switch(x) 0
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+#endif
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+
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 int dwc3_drd_init(struct dwc3 *dwc)
483
595
 {
484
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 	int ret, irq;
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+
598
+	if (ROLE_SWITCH &&
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+	    device_property_read_bool(dwc->dev, "usb-role-switch"))
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+		return dwc3_setup_role_switch(dwc);
485
601
 
486
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 	dwc->edev = dwc3_get_extcon(dwc);
487
603
 	if (IS_ERR(dwc->edev))
..
..
@@ -534,6 +650,9 @@
534
650
 {
535
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 	unsigned long flags;
536
652
 
653
+	if (dwc->role_sw)
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+		usb_role_switch_unregister(dwc->role_sw);
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+
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 	if (dwc->edev)
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 		extcon_unregister_notifier(dwc->edev, EXTCON_USB_HOST,
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658
 					   &dwc->edev_nb);
..
..
@@ -560,6 +679,6 @@
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 		break;
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680
 	}
562
681
 
563
-	if (!dwc->edev)
682
+	if (dwc->otg_irq)
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683
 		free_irq(dwc->otg_irq, dwc);
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684
 }