summaryrefslogtreecommitdiffstats
path: root/drivers/usb/host/ehci-sh.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--drivers/usb/host/ehci-sh.c182
1 files changed, 182 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-sh.c b/drivers/usb/host/ehci-sh.c
new file mode 100644
index 000000000..c25c51d26
--- /dev/null
+++ b/drivers/usb/host/ehci-sh.c
@@ -0,0 +1,182 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SuperH EHCI host controller driver
+ *
+ * Copyright (C) 2010 Paul Mundt
+ *
+ * Based on ohci-sh.c and ehci-atmel.c.
+ */
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+
+struct ehci_sh_priv {
+ struct clk *iclk, *fclk;
+ struct usb_hcd *hcd;
+};
+
+static int ehci_sh_reset(struct usb_hcd *hcd)
+{
+ struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+
+ ehci->caps = hcd->regs;
+
+ return ehci_setup(hcd);
+}
+
+static const struct hc_driver ehci_sh_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "SuperH EHCI",
+ .hcd_priv_size = sizeof(struct ehci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ehci_irq,
+ .flags = HCD_USB2 | HCD_DMA | HCD_MEMORY | HCD_BH,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = ehci_sh_reset,
+ .start = ehci_run,
+ .stop = ehci_stop,
+ .shutdown = ehci_shutdown,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = ehci_urb_enqueue,
+ .urb_dequeue = ehci_urb_dequeue,
+ .endpoint_disable = ehci_endpoint_disable,
+ .endpoint_reset = ehci_endpoint_reset,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = ehci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = ehci_hub_status_data,
+ .hub_control = ehci_hub_control,
+
+#ifdef CONFIG_PM
+ .bus_suspend = ehci_bus_suspend,
+ .bus_resume = ehci_bus_resume,
+#endif
+
+ .relinquish_port = ehci_relinquish_port,
+ .port_handed_over = ehci_port_handed_over,
+ .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
+};
+
+static int ehci_hcd_sh_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct ehci_sh_priv *priv;
+ struct usb_hcd *hcd;
+ int irq, ret;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq <= 0) {
+ ret = -ENODEV;
+ goto fail_create_hcd;
+ }
+
+ /* initialize hcd */
+ hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
+ dev_name(&pdev->dev));
+ if (!hcd) {
+ ret = -ENOMEM;
+ goto fail_create_hcd;
+ }
+
+ 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 fail_request_resource;
+ }
+ hcd->rsrc_start = res->start;
+ hcd->rsrc_len = resource_size(res);
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
+ GFP_KERNEL);
+ if (!priv) {
+ ret = -ENOMEM;
+ goto fail_request_resource;
+ }
+
+ /* These are optional, we don't care if they fail */
+ priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
+ if (IS_ERR(priv->fclk))
+ priv->fclk = NULL;
+
+ priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
+ if (IS_ERR(priv->iclk))
+ priv->iclk = NULL;
+
+ clk_enable(priv->fclk);
+ clk_enable(priv->iclk);
+
+ ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to add hcd");
+ goto fail_add_hcd;
+ }
+ device_wakeup_enable(hcd->self.controller);
+
+ priv->hcd = hcd;
+ platform_set_drvdata(pdev, priv);
+
+ return ret;
+
+fail_add_hcd:
+ clk_disable(priv->iclk);
+ clk_disable(priv->fclk);
+
+fail_request_resource:
+ usb_put_hcd(hcd);
+fail_create_hcd:
+ dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
+
+ return ret;
+}
+
+static int ehci_hcd_sh_remove(struct platform_device *pdev)
+{
+ struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
+ struct usb_hcd *hcd = priv->hcd;
+
+ usb_remove_hcd(hcd);
+ usb_put_hcd(hcd);
+
+ clk_disable(priv->fclk);
+ clk_disable(priv->iclk);
+
+ return 0;
+}
+
+static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
+{
+ struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
+ struct usb_hcd *hcd = priv->hcd;
+
+ if (hcd->driver->shutdown)
+ hcd->driver->shutdown(hcd);
+}
+
+static struct platform_driver ehci_hcd_sh_driver = {
+ .probe = ehci_hcd_sh_probe,
+ .remove = ehci_hcd_sh_remove,
+ .shutdown = ehci_hcd_sh_shutdown,
+ .driver = {
+ .name = "sh_ehci",
+ },
+};
+
+MODULE_ALIAS("platform:sh_ehci");