Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 248 insertions, 0 deletions

diff --git a/drivers/usb/cdns3/cdnsp-pci.c b/drivers/usb/cdns3/cdnsp-pci.c
new file mode 100644
index 0000000000..0725668ffe
--- /dev/null
+++ b/drivers/usb/cdns3/cdnsp-pci.c
@@ -0,0 +1,248 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Cadence PCI Glue driver.
+ *
+ * Copyright (C) 2019 Cadence.
+ *
+ * Author: Pawel Laszczak <pawell@cadence.com>
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+
+#include "core.h"
+#include "gadget-export.h"
+
+#define PCI_BAR_HOST		0
+#define PCI_BAR_OTG		0
+#define PCI_BAR_DEV		2
+
+#define PCI_DEV_FN_HOST_DEVICE	0
+#define PCI_DEV_FN_OTG		1
+
+#define PCI_DRIVER_NAME		"cdns-pci-usbssp"
+#define PLAT_DRIVER_NAME	"cdns-usbssp"
+
+#define CDNS_VENDOR_ID		0x17cd
+#define CDNS_DEVICE_ID		0x0200
+#define CDNS_DRD_ID		0x0100
+#define CDNS_DRD_IF		(PCI_CLASS_SERIAL_USB << 8 | 0x80)
+
+static struct pci_dev *cdnsp_get_second_fun(struct pci_dev *pdev)
+{
+	/*
+	 * Gets the second function.
+	 * Platform has two function. The fist keeps resources for
+	 * Host/Device while the secon keeps resources for DRD/OTG.
+	 */
+	if (pdev->device == CDNS_DEVICE_ID)
+		return  pci_get_device(pdev->vendor, CDNS_DRD_ID, NULL);
+	else if (pdev->device == CDNS_DRD_ID)
+		return pci_get_device(pdev->vendor, CDNS_DEVICE_ID, NULL);
+
+	return NULL;
+}
+
+static int cdnsp_pci_probe(struct pci_dev *pdev,
+			   const struct pci_device_id *id)
+{
+	struct device *dev = &pdev->dev;
+	struct pci_dev *func;
+	struct resource *res;
+	struct cdns *cdnsp;
+	int ret;
+
+	/*
+	 * For GADGET/HOST PCI (devfn) function number is 0,
+	 * for OTG PCI (devfn) function number is 1.
+	 */
+	if (!id || (pdev->devfn != PCI_DEV_FN_HOST_DEVICE &&
+		    pdev->devfn != PCI_DEV_FN_OTG))
+		return -EINVAL;
+
+	func = cdnsp_get_second_fun(pdev);
+	if (!func)
+		return -EINVAL;
+
+	if (func->class == PCI_CLASS_SERIAL_USB_XHCI ||
+	    pdev->class == PCI_CLASS_SERIAL_USB_XHCI) {
+		ret = -EINVAL;
+		goto put_pci;
+	}
+
+	ret = pcim_enable_device(pdev);
+	if (ret) {
+		dev_err(&pdev->dev, "Enabling PCI device has failed %d\n", ret);
+		goto put_pci;
+	}
+
+	pci_set_master(pdev);
+	if (pci_is_enabled(func)) {
+		cdnsp = pci_get_drvdata(func);
+	} else {
+		cdnsp = kzalloc(sizeof(*cdnsp), GFP_KERNEL);
+		if (!cdnsp) {
+			ret = -ENOMEM;
+			goto disable_pci;
+		}
+	}
+
+	/* For GADGET device function number is 0. */
+	if (pdev->devfn == 0) {
+		resource_size_t rsrc_start, rsrc_len;
+
+		/* Function 0: host(BAR_0) + device(BAR_1).*/
+		dev_dbg(dev, "Initialize resources\n");
+		rsrc_start = pci_resource_start(pdev, PCI_BAR_DEV);
+		rsrc_len = pci_resource_len(pdev, PCI_BAR_DEV);
+		res = devm_request_mem_region(dev, rsrc_start, rsrc_len, "dev");
+		if (!res) {
+			dev_dbg(dev, "controller already in use\n");
+			ret = -EBUSY;
+			goto free_cdnsp;
+		}
+
+		cdnsp->dev_regs = devm_ioremap(dev, rsrc_start, rsrc_len);
+		if (!cdnsp->dev_regs) {
+			dev_dbg(dev, "error mapping memory\n");
+			ret = -EFAULT;
+			goto free_cdnsp;
+		}
+
+		cdnsp->dev_irq = pdev->irq;
+		dev_dbg(dev, "USBSS-DEV physical base addr: %pa\n",
+			&rsrc_start);
+
+		res = &cdnsp->xhci_res[0];
+		res->start = pci_resource_start(pdev, PCI_BAR_HOST);
+		res->end = pci_resource_end(pdev, PCI_BAR_HOST);
+		res->name = "xhci";
+		res->flags = IORESOURCE_MEM;
+		dev_dbg(dev, "USBSS-XHCI physical base addr: %pa\n",
+			&res->start);
+
+		/* Interrupt for XHCI, */
+		res = &cdnsp->xhci_res[1];
+		res->start = pdev->irq;
+		res->name = "host";
+		res->flags = IORESOURCE_IRQ;
+	} else {
+		res = &cdnsp->otg_res;
+		res->start = pci_resource_start(pdev, PCI_BAR_OTG);
+		res->end =   pci_resource_end(pdev, PCI_BAR_OTG);
+		res->name = "otg";
+		res->flags = IORESOURCE_MEM;
+		dev_dbg(dev, "CDNSP-DRD physical base addr: %pa\n",
+			&res->start);
+
+		/* Interrupt for OTG/DRD. */
+		cdnsp->otg_irq = pdev->irq;
+	}
+
+	if (pci_is_enabled(func)) {
+		cdnsp->dev = dev;
+		cdnsp->gadget_init = cdnsp_gadget_init;
+
+		ret = cdns_init(cdnsp);
+		if (ret)
+			goto free_cdnsp;
+	}
+
+	pci_set_drvdata(pdev, cdnsp);
+
+	device_wakeup_enable(&pdev->dev);
+	if (pci_dev_run_wake(pdev))
+		pm_runtime_put_noidle(&pdev->dev);
+
+	return 0;
+
+free_cdnsp:
+	if (!pci_is_enabled(func))
+		kfree(cdnsp);
+
+disable_pci:
+	pci_disable_device(pdev);
+
+put_pci:
+	pci_dev_put(func);
+
+	return ret;
+}
+
+static void cdnsp_pci_remove(struct pci_dev *pdev)
+{
+	struct cdns *cdnsp;
+	struct pci_dev *func;
+
+	func = cdnsp_get_second_fun(pdev);
+	cdnsp = (struct cdns *)pci_get_drvdata(pdev);
+
+	if (pci_dev_run_wake(pdev))
+		pm_runtime_get_noresume(&pdev->dev);
+
+	if (pci_is_enabled(func)) {
+		cdns_remove(cdnsp);
+	} else {
+		kfree(cdnsp);
+	}
+
+	pci_dev_put(func);
+}
+
+static int __maybe_unused cdnsp_pci_suspend(struct device *dev)
+{
+	struct cdns *cdns = dev_get_drvdata(dev);
+
+	return cdns_suspend(cdns);
+}
+
+static int __maybe_unused cdnsp_pci_resume(struct device *dev)
+{
+	struct cdns *cdns = dev_get_drvdata(dev);
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&cdns->lock, flags);
+	ret = cdns_resume(cdns);
+	spin_unlock_irqrestore(&cdns->lock, flags);
+	cdns_set_active(cdns, 1);
+
+	return ret;
+}
+
+static const struct dev_pm_ops cdnsp_pci_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(cdnsp_pci_suspend, cdnsp_pci_resume)
+};
+
+static const struct pci_device_id cdnsp_pci_ids[] = {
+	{ PCI_VENDOR_ID_CDNS, CDNS_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,
+	  PCI_CLASS_SERIAL_USB_DEVICE, PCI_ANY_ID },
+	{ PCI_VENDOR_ID_CDNS, CDNS_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,
+	  CDNS_DRD_IF, PCI_ANY_ID },
+	{ PCI_VENDOR_ID_CDNS, CDNS_DRD_ID, PCI_ANY_ID, PCI_ANY_ID,
+	  CDNS_DRD_IF, PCI_ANY_ID },
+	{ 0, }
+};
+
+static struct pci_driver cdnsp_pci_driver = {
+	.name = "cdnsp-pci",
+	.id_table = &cdnsp_pci_ids[0],
+	.probe = cdnsp_pci_probe,
+	.remove = cdnsp_pci_remove,
+	.driver = {
+		.pm = &cdnsp_pci_pm_ops,
+	}
+};
+
+module_pci_driver(cdnsp_pci_driver);
+MODULE_DEVICE_TABLE(pci, cdnsp_pci_ids);
+
+MODULE_ALIAS("pci:cdnsp");
+MODULE_AUTHOR("Pawel Laszczak <pawell@cadence.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Cadence CDNSP PCI driver");