|
|
@@ -0,0 +1,274 @@
|
|
|
+/*
|
|
|
+ * SAMSUNG EXYNOS USB HOST OHCI Controller
|
|
|
+ *
|
|
|
+ * Copyright (C) 2011 Samsung Electronics Co.Ltd
|
|
|
+ * Author: Jingoo Han <jg1.han@samsung.com>
|
|
|
+ *
|
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
|
+ * under the terms of the GNU General Public License as published by the
|
|
|
+ * Free Software Foundation; either version 2 of the License, or (at your
|
|
|
+ * option) any later version.
|
|
|
+ *
|
|
|
+ */
|
|
|
+
|
|
|
+#include <linux/clk.h>
|
|
|
+#include <linux/platform_device.h>
|
|
|
+#include <mach/ohci.h>
|
|
|
+#include <plat/usb-phy.h>
|
|
|
+
|
|
|
+struct exynos_ohci_hcd {
|
|
|
+ struct device *dev;
|
|
|
+ struct usb_hcd *hcd;
|
|
|
+ struct clk *clk;
|
|
|
+};
|
|
|
+
|
|
|
+static int ohci_exynos_start(struct usb_hcd *hcd)
|
|
|
+{
|
|
|
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ ohci_dbg(ohci, "ohci_exynos_start, ohci:%p", ohci);
|
|
|
+
|
|
|
+ ret = ohci_init(ohci);
|
|
|
+ if (ret < 0)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ ret = ohci_run(ohci);
|
|
|
+ if (ret < 0) {
|
|
|
+ err("can't start %s", hcd->self.bus_name);
|
|
|
+ ohci_stop(hcd);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static const struct hc_driver exynos_ohci_hc_driver = {
|
|
|
+ .description = hcd_name,
|
|
|
+ .product_desc = "EXYNOS OHCI Host Controller",
|
|
|
+ .hcd_priv_size = sizeof(struct ohci_hcd),
|
|
|
+
|
|
|
+ .irq = ohci_irq,
|
|
|
+ .flags = HCD_MEMORY|HCD_USB11,
|
|
|
+
|
|
|
+ .start = ohci_exynos_start,
|
|
|
+ .stop = ohci_stop,
|
|
|
+ .shutdown = ohci_shutdown,
|
|
|
+
|
|
|
+ .get_frame_number = ohci_get_frame,
|
|
|
+
|
|
|
+ .urb_enqueue = ohci_urb_enqueue,
|
|
|
+ .urb_dequeue = ohci_urb_dequeue,
|
|
|
+ .endpoint_disable = ohci_endpoint_disable,
|
|
|
+
|
|
|
+ .hub_status_data = ohci_hub_status_data,
|
|
|
+ .hub_control = ohci_hub_control,
|
|
|
+#ifdef CONFIG_PM
|
|
|
+ .bus_suspend = ohci_bus_suspend,
|
|
|
+ .bus_resume = ohci_bus_resume,
|
|
|
+#endif
|
|
|
+ .start_port_reset = ohci_start_port_reset,
|
|
|
+};
|
|
|
+
|
|
|
+static int __devinit exynos_ohci_probe(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct exynos4_ohci_platdata *pdata;
|
|
|
+ struct exynos_ohci_hcd *exynos_ohci;
|
|
|
+ struct usb_hcd *hcd;
|
|
|
+ struct ohci_hcd *ohci;
|
|
|
+ struct resource *res;
|
|
|
+ int irq;
|
|
|
+ int err;
|
|
|
+
|
|
|
+ pdata = pdev->dev.platform_data;
|
|
|
+ if (!pdata) {
|
|
|
+ dev_err(&pdev->dev, "No platform data defined\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ exynos_ohci = kzalloc(sizeof(struct exynos_ohci_hcd), GFP_KERNEL);
|
|
|
+ if (!exynos_ohci)
|
|
|
+ return -ENOMEM;
|
|
|
+
|
|
|
+ exynos_ohci->dev = &pdev->dev;
|
|
|
+
|
|
|
+ hcd = usb_create_hcd(&exynos_ohci_hc_driver, &pdev->dev,
|
|
|
+ dev_name(&pdev->dev));
|
|
|
+ if (!hcd) {
|
|
|
+ dev_err(&pdev->dev, "Unable to create HCD\n");
|
|
|
+ err = -ENOMEM;
|
|
|
+ goto fail_hcd;
|
|
|
+ }
|
|
|
+
|
|
|
+ exynos_ohci->hcd = hcd;
|
|
|
+ exynos_ohci->clk = clk_get(&pdev->dev, "usbhost");
|
|
|
+
|
|
|
+ if (IS_ERR(exynos_ohci->clk)) {
|
|
|
+ dev_err(&pdev->dev, "Failed to get usbhost clock\n");
|
|
|
+ err = PTR_ERR(exynos_ohci->clk);
|
|
|
+ goto fail_clk;
|
|
|
+ }
|
|
|
+
|
|
|
+ err = clk_enable(exynos_ohci->clk);
|
|
|
+ if (err)
|
|
|
+ goto fail_clken;
|
|
|
+
|
|
|
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
+ if (!res) {
|
|
|
+ dev_err(&pdev->dev, "Failed to get I/O memory\n");
|
|
|
+ err = -ENXIO;
|
|
|
+ goto fail_io;
|
|
|
+ }
|
|
|
+
|
|
|
+ hcd->rsrc_start = res->start;
|
|
|
+ hcd->rsrc_len = resource_size(res);
|
|
|
+ hcd->regs = ioremap(res->start, resource_size(res));
|
|
|
+ if (!hcd->regs) {
|
|
|
+ dev_err(&pdev->dev, "Failed to remap I/O memory\n");
|
|
|
+ err = -ENOMEM;
|
|
|
+ goto fail_io;
|
|
|
+ }
|
|
|
+
|
|
|
+ irq = platform_get_irq(pdev, 0);
|
|
|
+ if (!irq) {
|
|
|
+ dev_err(&pdev->dev, "Failed to get IRQ\n");
|
|
|
+ err = -ENODEV;
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (pdata->phy_init)
|
|
|
+ pdata->phy_init(pdev, S5P_USB_PHY_HOST);
|
|
|
+
|
|
|
+ ohci = hcd_to_ohci(hcd);
|
|
|
+ ohci_hcd_init(ohci);
|
|
|
+
|
|
|
+ err = usb_add_hcd(hcd, irq, IRQF_SHARED);
|
|
|
+ if (err) {
|
|
|
+ dev_err(&pdev->dev, "Failed to add USB HCD\n");
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+
|
|
|
+ platform_set_drvdata(pdev, exynos_ohci);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+
|
|
|
+fail:
|
|
|
+ iounmap(hcd->regs);
|
|
|
+fail_io:
|
|
|
+ clk_disable(exynos_ohci->clk);
|
|
|
+fail_clken:
|
|
|
+ clk_put(exynos_ohci->clk);
|
|
|
+fail_clk:
|
|
|
+ usb_put_hcd(hcd);
|
|
|
+fail_hcd:
|
|
|
+ kfree(exynos_ohci);
|
|
|
+ return err;
|
|
|
+}
|
|
|
+
|
|
|
+static int __devexit exynos_ohci_remove(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data;
|
|
|
+ struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev);
|
|
|
+ struct usb_hcd *hcd = exynos_ohci->hcd;
|
|
|
+
|
|
|
+ usb_remove_hcd(hcd);
|
|
|
+
|
|
|
+ if (pdata && pdata->phy_exit)
|
|
|
+ pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
|
|
|
+
|
|
|
+ iounmap(hcd->regs);
|
|
|
+
|
|
|
+ clk_disable(exynos_ohci->clk);
|
|
|
+ clk_put(exynos_ohci->clk);
|
|
|
+
|
|
|
+ usb_put_hcd(hcd);
|
|
|
+ kfree(exynos_ohci);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static void exynos_ohci_shutdown(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev);
|
|
|
+ struct usb_hcd *hcd = exynos_ohci->hcd;
|
|
|
+
|
|
|
+ if (hcd->driver->shutdown)
|
|
|
+ hcd->driver->shutdown(hcd);
|
|
|
+}
|
|
|
+
|
|
|
+#ifdef CONFIG_PM
|
|
|
+static int exynos_ohci_suspend(struct device *dev)
|
|
|
+{
|
|
|
+ struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev);
|
|
|
+ struct usb_hcd *hcd = exynos_ohci->hcd;
|
|
|
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
|
|
|
+ struct platform_device *pdev = to_platform_device(dev);
|
|
|
+ struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data;
|
|
|
+ unsigned long flags;
|
|
|
+ int rc = 0;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Root hub was already suspended. Disable irq emission and
|
|
|
+ * mark HW unaccessible, bail out if RH has been resumed. Use
|
|
|
+ * the spinlock to properly synchronize with possible pending
|
|
|
+ * RH suspend or resume activity.
|
|
|
+ *
|
|
|
+ * This is still racy as hcd->state is manipulated outside of
|
|
|
+ * any locks =P But that will be a different fix.
|
|
|
+ */
|
|
|
+ spin_lock_irqsave(&ohci->lock, flags);
|
|
|
+ if (hcd->state != HC_STATE_SUSPENDED && hcd->state != HC_STATE_HALT) {
|
|
|
+ rc = -EINVAL;
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+
|
|
|
+ clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
|
|
|
+
|
|
|
+ if (pdata && pdata->phy_exit)
|
|
|
+ pdata->phy_exit(pdev, S5P_USB_PHY_HOST);
|
|
|
+fail:
|
|
|
+ spin_unlock_irqrestore(&ohci->lock, flags);
|
|
|
+
|
|
|
+ return rc;
|
|
|
+}
|
|
|
+
|
|
|
+static int exynos_ohci_resume(struct device *dev)
|
|
|
+{
|
|
|
+ struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev);
|
|
|
+ struct usb_hcd *hcd = exynos_ohci->hcd;
|
|
|
+ struct platform_device *pdev = to_platform_device(dev);
|
|
|
+ struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data;
|
|
|
+
|
|
|
+ if (pdata && pdata->phy_init)
|
|
|
+ pdata->phy_init(pdev, S5P_USB_PHY_HOST);
|
|
|
+
|
|
|
+ /* Mark hardware accessible again as we are out of D3 state by now */
|
|
|
+ set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
|
|
|
+
|
|
|
+ ohci_finish_controller_resume(hcd);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+#else
|
|
|
+#define exynos_ohci_suspend NULL
|
|
|
+#define exynos_ohci_resume NULL
|
|
|
+#endif
|
|
|
+
|
|
|
+static const struct dev_pm_ops exynos_ohci_pm_ops = {
|
|
|
+ .suspend = exynos_ohci_suspend,
|
|
|
+ .resume = exynos_ohci_resume,
|
|
|
+};
|
|
|
+
|
|
|
+static struct platform_driver exynos_ohci_driver = {
|
|
|
+ .probe = exynos_ohci_probe,
|
|
|
+ .remove = __devexit_p(exynos_ohci_remove),
|
|
|
+ .shutdown = exynos_ohci_shutdown,
|
|
|
+ .driver = {
|
|
|
+ .name = "exynos-ohci",
|
|
|
+ .owner = THIS_MODULE,
|
|
|
+ .pm = &exynos_ohci_pm_ops,
|
|
|
+ }
|
|
|
+};
|
|
|
+
|
|
|
+MODULE_ALIAS("platform:exynos-ohci");
|
|
|
+MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
|
Arnd Bergmann