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![Greg Kroah-Hartman](/assets/img/avatar_default.png)
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
192 lines
4 KiB
C
192 lines
4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* SuperH EHCI host controller driver
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*
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* Copyright (C) 2010 Paul Mundt
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*
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* Based on ohci-sh.c and ehci-atmel.c.
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*/
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/platform_data/ehci-sh.h>
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struct ehci_sh_priv {
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struct clk *iclk, *fclk;
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struct usb_hcd *hcd;
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};
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static int ehci_sh_reset(struct usb_hcd *hcd)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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ehci->caps = hcd->regs;
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return ehci_setup(hcd);
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}
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static const struct hc_driver ehci_sh_hc_driver = {
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.description = hcd_name,
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.product_desc = "SuperH EHCI",
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.hcd_priv_size = sizeof(struct ehci_hcd),
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/*
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* generic hardware linkage
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*/
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.irq = ehci_irq,
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.flags = HCD_USB2 | HCD_MEMORY | HCD_BH,
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/*
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* basic lifecycle operations
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*/
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.reset = ehci_sh_reset,
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.start = ehci_run,
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.stop = ehci_stop,
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.shutdown = ehci_shutdown,
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/*
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* managing i/o requests and associated device resources
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*/
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.urb_enqueue = ehci_urb_enqueue,
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.urb_dequeue = ehci_urb_dequeue,
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.endpoint_disable = ehci_endpoint_disable,
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.endpoint_reset = ehci_endpoint_reset,
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/*
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* scheduling support
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*/
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.get_frame_number = ehci_get_frame,
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/*
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* root hub support
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*/
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.hub_status_data = ehci_hub_status_data,
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.hub_control = ehci_hub_control,
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#ifdef CONFIG_PM
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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#endif
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.relinquish_port = ehci_relinquish_port,
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.port_handed_over = ehci_port_handed_over,
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.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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};
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static int ehci_hcd_sh_probe(struct platform_device *pdev)
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{
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struct resource *res;
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struct ehci_sh_priv *priv;
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struct ehci_sh_platdata *pdata;
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struct usb_hcd *hcd;
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int irq, ret;
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if (usb_disabled())
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return -ENODEV;
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irq = platform_get_irq(pdev, 0);
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if (irq <= 0) {
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dev_err(&pdev->dev,
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"Found HC with no IRQ. Check %s setup!\n",
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dev_name(&pdev->dev));
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ret = -ENODEV;
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goto fail_create_hcd;
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}
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pdata = dev_get_platdata(&pdev->dev);
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/* initialize hcd */
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hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
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dev_name(&pdev->dev));
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if (!hcd) {
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ret = -ENOMEM;
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goto fail_create_hcd;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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hcd->regs = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(hcd->regs)) {
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ret = PTR_ERR(hcd->regs);
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goto fail_request_resource;
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}
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hcd->rsrc_start = res->start;
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hcd->rsrc_len = resource_size(res);
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priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
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GFP_KERNEL);
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if (!priv) {
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ret = -ENOMEM;
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goto fail_request_resource;
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}
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/* These are optional, we don't care if they fail */
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priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
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if (IS_ERR(priv->fclk))
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priv->fclk = NULL;
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priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
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if (IS_ERR(priv->iclk))
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priv->iclk = NULL;
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clk_enable(priv->fclk);
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clk_enable(priv->iclk);
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if (pdata && pdata->phy_init)
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pdata->phy_init();
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ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (ret != 0) {
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dev_err(&pdev->dev, "Failed to add hcd");
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goto fail_add_hcd;
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}
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device_wakeup_enable(hcd->self.controller);
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priv->hcd = hcd;
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platform_set_drvdata(pdev, priv);
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return ret;
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fail_add_hcd:
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clk_disable(priv->iclk);
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clk_disable(priv->fclk);
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fail_request_resource:
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usb_put_hcd(hcd);
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fail_create_hcd:
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dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
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return ret;
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}
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static int ehci_hcd_sh_remove(struct platform_device *pdev)
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{
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struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
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struct usb_hcd *hcd = priv->hcd;
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usb_remove_hcd(hcd);
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usb_put_hcd(hcd);
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clk_disable(priv->fclk);
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clk_disable(priv->iclk);
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return 0;
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}
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static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
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{
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struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
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struct usb_hcd *hcd = priv->hcd;
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if (hcd->driver->shutdown)
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hcd->driver->shutdown(hcd);
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}
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static struct platform_driver ehci_hcd_sh_driver = {
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.probe = ehci_hcd_sh_probe,
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.remove = ehci_hcd_sh_remove,
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.shutdown = ehci_hcd_sh_shutdown,
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.driver = {
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.name = "sh_ehci",
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},
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};
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MODULE_ALIAS("platform:sh_ehci");
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