summaryrefslogtreecommitdiffstats
path: root/drivers/usb/dwc3/host.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/usb/dwc3/host.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/usb/dwc3/host.c')
-rw-r--r--drivers/usb/dwc3/host.c134
1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
new file mode 100644
index 0000000000..61f57fe5bb
--- /dev/null
+++ b/drivers/usb/dwc3/host.c
@@ -0,0 +1,134 @@
+// 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);
+
+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;
+}