* version 2 as published by the Free Software Foundation.
*/
-#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/usb/phy.h>
#include <linux/slab.h>
+#include <linux/usb/xhci_pdriver.h>
+#include <linux/acpi.h>
#include "xhci.h"
+#include "xhci-mvebu.h"
+#include "xhci-rcar.h"
+
+static struct hc_driver __read_mostly xhci_plat_hc_driver;
+
+static int xhci_plat_setup(struct usb_hcd *hcd);
+static int xhci_plat_start(struct usb_hcd *hcd);
+
+static const struct xhci_driver_overrides xhci_plat_overrides __initconst = {
+ .extra_priv_size = sizeof(struct xhci_hcd),
+ .reset = xhci_plat_setup,
+ .start = xhci_plat_start,
+};
static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
{
+ struct usb_xhci_pdata *pdata = dev_get_platdata(dev);
+
/*
* As of now platform drivers don't provide MSI support so we ensure
* here that the generic code does not try to make a pci_dev from our
* dev struct in order to setup MSI
*/
- xhci->quirks |= XHCI_BROKEN_MSI;
+ xhci->quirks |= XHCI_PLAT;
+
+ /*
+ * On some xHCI controllers (e.g. Rockchip SoCs), it need an
+ * extraordinary delay to wait for xHCI enter the Halted state
+ * after the Run/Stop (R/S) bit is cleared to '0'.
+ */
+ if (pdata && pdata->xhci_slow_suspend)
+ xhci->quirks |= XHCI_SLOW_SUSPEND;
}
/* called during probe() after chip reset completes */
static int xhci_plat_setup(struct usb_hcd *hcd)
{
+ struct device_node *of_node = hcd->self.controller->of_node;
+ int ret;
+
+ if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") ||
+ of_device_is_compatible(of_node, "renesas,xhci-r8a7791")) {
+ ret = xhci_rcar_init_quirk(hcd);
+ if (ret)
+ return ret;
+ }
+
return xhci_gen_setup(hcd, xhci_plat_quirks);
}
-static const struct hc_driver xhci_plat_xhci_driver = {
- .description = "xhci-hcd",
- .product_desc = "xHCI Host Controller",
- .hcd_priv_size = sizeof(struct xhci_hcd *),
-
- /*
- * generic hardware linkage
- */
- .irq = xhci_irq,
- .flags = HCD_MEMORY | HCD_USB3 | HCD_SHARED,
-
- /*
- * basic lifecycle operations
- */
- .reset = xhci_plat_setup,
- .start = xhci_run,
- .stop = xhci_stop,
- .shutdown = xhci_shutdown,
-
- /*
- * managing i/o requests and associated device resources
- */
- .urb_enqueue = xhci_urb_enqueue,
- .urb_dequeue = xhci_urb_dequeue,
- .alloc_dev = xhci_alloc_dev,
- .free_dev = xhci_free_dev,
- .alloc_streams = xhci_alloc_streams,
- .free_streams = xhci_free_streams,
- .add_endpoint = xhci_add_endpoint,
- .drop_endpoint = xhci_drop_endpoint,
- .endpoint_reset = xhci_endpoint_reset,
- .check_bandwidth = xhci_check_bandwidth,
- .reset_bandwidth = xhci_reset_bandwidth,
- .address_device = xhci_address_device,
- .update_hub_device = xhci_update_hub_device,
- .reset_device = xhci_discover_or_reset_device,
+static int xhci_plat_start(struct usb_hcd *hcd)
+{
+ struct device_node *of_node = hcd->self.controller->of_node;
- /*
- * scheduling support
- */
- .get_frame_number = xhci_get_frame,
+ if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") ||
+ of_device_is_compatible(of_node, "renesas,xhci-r8a7791"))
+ xhci_rcar_start(hcd);
- /* Root hub support */
- .hub_control = xhci_hub_control,
- .hub_status_data = xhci_hub_status_data,
- .bus_suspend = xhci_bus_suspend,
- .bus_resume = xhci_bus_resume,
-};
+ return xhci_run(hcd);
+}
static int xhci_plat_probe(struct platform_device *pdev)
{
+ struct device_node *node = pdev->dev.of_node;
+ struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev);
const struct hc_driver *driver;
struct xhci_hcd *xhci;
struct resource *res;
struct usb_hcd *hcd;
+ struct clk *clk;
int ret;
int irq;
if (usb_disabled())
return -ENODEV;
- driver = &xhci_plat_xhci_driver;
+ driver = &xhci_plat_hc_driver;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return -ENODEV;
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -ENODEV;
+ /* Try to set 64-bit DMA first */
+ if (WARN_ON(!pdev->dev.dma_mask))
+ /* Platform did not initialize dma_mask */
+ ret = dma_coerce_mask_and_coherent(&pdev->dev,
+ DMA_BIT_MASK(64));
+ else
+ ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+
+ /* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */
+ if (ret) {
+ ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret)
+ return ret;
+ }
hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
if (!hcd)
return -ENOMEM;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hcd->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(hcd->regs)) {
+ ret = PTR_ERR(hcd->regs);
+ goto put_hcd;
+ }
+
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
- if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
- driver->description)) {
- dev_dbg(&pdev->dev, "controller already in use\n");
- ret = -EBUSY;
+ /*
+ * Not all platforms have a clk so it is not an error if the
+ * clock does not exists.
+ */
+ clk = devm_clk_get(&pdev->dev, NULL);
+ if (!IS_ERR(clk)) {
+ ret = clk_prepare_enable(clk);
+ if (ret)
+ goto put_hcd;
+ } else if (PTR_ERR(clk) == -EPROBE_DEFER) {
+ ret = -EPROBE_DEFER;
goto put_hcd;
}
- hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
- if (!hcd->regs) {
- dev_dbg(&pdev->dev, "error mapping memory\n");
- ret = -EFAULT;
- goto release_mem_region;
+ if (of_device_is_compatible(pdev->dev.of_node,
+ "marvell,armada-375-xhci") ||
+ of_device_is_compatible(pdev->dev.of_node,
+ "marvell,armada-380-xhci")) {
+ ret = xhci_mvebu_mbus_init_quirk(pdev);
+ if (ret)
+ goto disable_clk;
}
- ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
- if (ret)
- goto unmap_registers;
+ device_wakeup_enable(hcd->self.controller);
- /* USB 2.0 roothub is stored in the platform_device now. */
- hcd = dev_get_drvdata(&pdev->dev);
xhci = hcd_to_xhci(hcd);
+ xhci->clk = clk;
+ xhci->main_hcd = hcd;
xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
dev_name(&pdev->dev), hcd);
if (!xhci->shared_hcd) {
ret = -ENOMEM;
- goto dealloc_usb2_hcd;
+ goto disable_clk;
}
- /*
- * Set the xHCI pointer before xhci_plat_setup() (aka hcd_driver.reset)
- * is called by usb_add_hcd().
- */
- *((struct xhci_hcd **) xhci->shared_hcd->hcd_priv) = xhci;
+ if ((node && of_property_read_bool(node, "usb3-lpm-capable")) ||
+ (pdata && pdata->usb3_lpm_capable))
+ xhci->quirks |= XHCI_LPM_SUPPORT;
+
+ if (pdata && pdata->usb3_disable_autosuspend)
+ xhci->quirks |= XHCI_DIS_AUTOSUSPEND;
+
+ xhci->shared_hcd->usb_phy = devm_usb_get_phy(&pdev->dev,
+ USB_PHY_TYPE_USB3);
+ if (IS_ERR(xhci->shared_hcd->usb_phy)) {
+ ret = PTR_ERR(xhci->shared_hcd->usb_phy);
+ if (ret == -EPROBE_DEFER)
+ goto put_usb3_hcd;
+ xhci->shared_hcd->usb_phy = NULL;
+ }
+
+ hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
+ if (IS_ERR(hcd->usb_phy)) {
+ ret = PTR_ERR(hcd->usb_phy);
+ if (ret == -EPROBE_DEFER)
+ goto put_usb3_hcd;
+ hcd->usb_phy = NULL;
+ } else {
+ ret = usb_phy_init(hcd->usb_phy);
+ if (ret)
+ goto put_usb3_hcd;
+ }
+
+ ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
+ if (ret)
+ goto disable_usb_phy;
ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
if (ret)
- goto put_usb3_hcd;
+ goto dealloc_usb2_hcd;
+
+ if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
+ xhci->shared_hcd->can_do_streams = 1;
return 0;
-put_usb3_hcd:
- usb_put_hcd(xhci->shared_hcd);
dealloc_usb2_hcd:
usb_remove_hcd(hcd);
-unmap_registers:
- iounmap(hcd->regs);
+disable_usb_phy:
+ usb_phy_shutdown(hcd->usb_phy);
-release_mem_region:
- release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+put_usb3_hcd:
+ usb_put_hcd(xhci->shared_hcd);
+
+disable_clk:
+ if (!IS_ERR(clk))
+ clk_disable_unprepare(clk);
put_hcd:
usb_put_hcd(hcd);
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+ struct clk *clk = xhci->clk;
usb_remove_hcd(xhci->shared_hcd);
- usb_put_hcd(xhci->shared_hcd);
+ usb_phy_shutdown(hcd->usb_phy);
usb_remove_hcd(hcd);
- iounmap(hcd->regs);
+ usb_put_hcd(xhci->shared_hcd);
+
+ if (!IS_ERR(clk))
+ clk_disable_unprepare(clk);
usb_put_hcd(hcd);
- kfree(xhci);
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int xhci_plat_suspend(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ /*
+ * xhci_suspend() needs `do_wakeup` to know whether host is allowed
+ * to do wakeup during suspend. Since xhci_plat_suspend is currently
+ * only designed for system suspend, device_may_wakeup() is enough
+ * to dertermine whether host is allowed to do wakeup. Need to
+ * reconsider this when xhci_plat_suspend enlarges its scope, e.g.,
+ * also applies to runtime suspend.
+ */
+ return xhci_suspend(xhci, device_may_wakeup(dev));
+}
+
+static int xhci_plat_resume(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+ return xhci_resume(xhci, 0);
+}
+
+static const struct dev_pm_ops xhci_plat_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
+};
+#define DEV_PM_OPS (&xhci_plat_pm_ops)
+#else
+#define DEV_PM_OPS NULL
+#endif /* CONFIG_PM */
+
+#ifdef CONFIG_OF
+static const struct of_device_id usb_xhci_of_match[] = {
+ { .compatible = "generic-xhci" },
+ { .compatible = "xhci-platform" },
+ { .compatible = "marvell,armada-375-xhci"},
+ { .compatible = "marvell,armada-380-xhci"},
+ { .compatible = "renesas,xhci-r8a7790"},
+ { .compatible = "renesas,xhci-r8a7791"},
+ { },
+};
+MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
+#endif
+
+static const struct acpi_device_id usb_xhci_acpi_match[] = {
+ /* XHCI-compliant USB Controller */
+ { "PNP0D10", },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);
+
static struct platform_driver usb_xhci_driver = {
.probe = xhci_plat_probe,
.remove = xhci_plat_remove,
+ .shutdown = usb_hcd_platform_shutdown,
.driver = {
.name = "xhci-hcd",
+ .pm = DEV_PM_OPS,
+ .of_match_table = of_match_ptr(usb_xhci_of_match),
+ .acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
},
};
MODULE_ALIAS("platform:xhci-hcd");
-int xhci_register_plat(void)
+static int __init xhci_plat_init(void)
{
+ xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides);
return platform_driver_register(&usb_xhci_driver);
}
+module_init(xhci_plat_init);
-void xhci_unregister_plat(void)
+static void __exit xhci_plat_exit(void)
{
platform_driver_unregister(&usb_xhci_driver);
}
+module_exit(xhci_plat_exit);
+
+MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
+MODULE_LICENSE("GPL");
projects / firefly-linux-kernel-4.4.55.git / blobdiff