From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 drivers/usb/dwc3/host.c | 139 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 drivers/usb/dwc3/host.c

(limited to 'drivers/usb/dwc3/host.c')

diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
new file mode 100644
index 000000000..f6f13e7f1
--- /dev/null
+++ b/drivers/usb/dwc3/host.c
@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * host.c - DesignWare USB3 DRD Controller Host Glue
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com
+ *
+ * Authors: Felipe Balbi <balbi@ti.com>,
+ */
+
+#include <linux/irq.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+#include "core.h"
+
+static void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc,
+					int irq, char *name)
+{
+	struct platform_device *pdev = to_platform_device(dwc->dev);
+	struct device_node *np = dev_of_node(&pdev->dev);
+
+	dwc->xhci_resources[1].start = irq;
+	dwc->xhci_resources[1].end = irq;
+	dwc->xhci_resources[1].flags = IORESOURCE_IRQ | irq_get_trigger_type(irq);
+	if (!name && np)
+		dwc->xhci_resources[1].name = of_node_full_name(pdev->dev.of_node);
+	else
+		dwc->xhci_resources[1].name = name;
+}
+
+static int dwc3_host_get_irq(struct dwc3 *dwc)
+{
+	struct platform_device	*dwc3_pdev = to_platform_device(dwc->dev);
+	int irq;
+
+	irq = platform_get_irq_byname_optional(dwc3_pdev, "host");
+	if (irq > 0) {
+		dwc3_host_fill_xhci_irq_res(dwc, irq, "host");
+		goto out;
+	}
+
+	if (irq == -EPROBE_DEFER)
+		goto out;
+
+	irq = platform_get_irq_byname_optional(dwc3_pdev, "dwc_usb3");
+	if (irq > 0) {
+		dwc3_host_fill_xhci_irq_res(dwc, irq, "dwc_usb3");
+		goto out;
+	}
+
+	if (irq == -EPROBE_DEFER)
+		goto out;
+
+	irq = platform_get_irq(dwc3_pdev, 0);
+	if (irq > 0) {
+		dwc3_host_fill_xhci_irq_res(dwc, irq, NULL);
+		goto out;
+	}
+
+	if (!irq)
+		irq = -EINVAL;
+
+out:
+	return irq;
+}
+
+int dwc3_host_init(struct dwc3 *dwc)
+{
+	struct property_entry	props[4];
+	struct platform_device	*xhci;
+	int			ret, irq;
+	int			prop_idx = 0;
+
+	irq = dwc3_host_get_irq(dwc);
+	if (irq < 0)
+		return irq;
+
+	xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
+	if (!xhci) {
+		dev_err(dwc->dev, "couldn't allocate xHCI device\n");
+		return -ENOMEM;
+	}
+
+	xhci->dev.parent	= dwc->dev;
+
+	dwc->xhci = xhci;
+
+	ret = platform_device_add_resources(xhci, dwc->xhci_resources,
+						DWC3_XHCI_RESOURCES_NUM);
+	if (ret) {
+		dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
+		goto err;
+	}
+
+	memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
+
+	if (dwc->usb3_lpm_capable)
+		props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable");
+
+	if (dwc->usb2_lpm_disable)
+		props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable");
+
+	/**
+	 * WORKAROUND: dwc3 revisions <=3.00a have a limitation
+	 * where Port Disable command doesn't work.
+	 *
+	 * The suggested workaround is that we avoid Port Disable
+	 * completely.
+	 *
+	 * This following flag tells XHCI to do just that.
+	 */
+	if (DWC3_VER_IS_WITHIN(DWC3, ANY, 300A))
+		props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped");
+
+	if (prop_idx) {
+		ret = device_create_managed_software_node(&xhci->dev, props, NULL);
+		if (ret) {
+			dev_err(dwc->dev, "failed to add properties to xHCI\n");
+			goto err;
+		}
+	}
+
+	ret = platform_device_add(xhci);
+	if (ret) {
+		dev_err(dwc->dev, "failed to register xHCI device\n");
+		goto err;
+	}
+
+	return 0;
+err:
+	platform_device_put(xhci);
+	return ret;
+}
+
+void dwc3_host_exit(struct dwc3 *dwc)
+{
+	platform_device_unregister(dwc->xhci);
+	dwc->xhci = NULL;
+}
-- 
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