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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>
201 lines
4.7 KiB
C
201 lines
4.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* OHCI HCD (Host Controller Driver) for USB.
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*
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* Copyright (C) 2010 ST Microelectronics.
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* Deepak Sikri<deepak.sikri@st.com>
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*
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* Based on various ohci-*.c drivers
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*/
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#include <linux/clk.h>
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#include <linux/dma-mapping.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/signal.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include "ohci.h"
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#define DRIVER_DESC "OHCI SPEAr driver"
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static const char hcd_name[] = "SPEAr-ohci";
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struct spear_ohci {
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struct clk *clk;
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};
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#define to_spear_ohci(hcd) (struct spear_ohci *)(hcd_to_ohci(hcd)->priv)
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static struct hc_driver __read_mostly ohci_spear_hc_driver;
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static int spear_ohci_hcd_drv_probe(struct platform_device *pdev)
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{
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const struct hc_driver *driver = &ohci_spear_hc_driver;
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struct ohci_hcd *ohci;
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struct usb_hcd *hcd = NULL;
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struct clk *usbh_clk;
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struct spear_ohci *sohci_p;
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struct resource *res;
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int retval, irq;
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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retval = irq;
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goto fail;
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}
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/*
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* Right now device-tree probed devices don't get dma_mask set.
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* Since shared usb code relies on it, set it here for now.
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* Once we have dma capability bindings this can go away.
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*/
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retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
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if (retval)
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goto fail;
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usbh_clk = devm_clk_get(&pdev->dev, NULL);
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if (IS_ERR(usbh_clk)) {
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dev_err(&pdev->dev, "Error getting interface clock\n");
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retval = PTR_ERR(usbh_clk);
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goto fail;
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}
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hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
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if (!hcd) {
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retval = -ENOMEM;
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goto fail;
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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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retval = PTR_ERR(hcd->regs);
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goto err_put_hcd;
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}
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hcd->rsrc_start = pdev->resource[0].start;
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hcd->rsrc_len = resource_size(res);
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sohci_p = to_spear_ohci(hcd);
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sohci_p->clk = usbh_clk;
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clk_prepare_enable(sohci_p->clk);
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ohci = hcd_to_ohci(hcd);
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retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), 0);
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if (retval == 0) {
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device_wakeup_enable(hcd->self.controller);
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return retval;
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}
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clk_disable_unprepare(sohci_p->clk);
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err_put_hcd:
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usb_put_hcd(hcd);
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fail:
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dev_err(&pdev->dev, "init fail, %d\n", retval);
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return retval;
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}
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static int spear_ohci_hcd_drv_remove(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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struct spear_ohci *sohci_p = to_spear_ohci(hcd);
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usb_remove_hcd(hcd);
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if (sohci_p->clk)
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clk_disable_unprepare(sohci_p->clk);
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usb_put_hcd(hcd);
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return 0;
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}
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#if defined(CONFIG_PM)
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static int spear_ohci_hcd_drv_suspend(struct platform_device *pdev,
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pm_message_t message)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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struct spear_ohci *sohci_p = to_spear_ohci(hcd);
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bool do_wakeup = device_may_wakeup(&pdev->dev);
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int ret;
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if (time_before(jiffies, ohci->next_statechange))
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msleep(5);
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ohci->next_statechange = jiffies;
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ret = ohci_suspend(hcd, do_wakeup);
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if (ret)
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return ret;
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clk_disable_unprepare(sohci_p->clk);
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return ret;
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}
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static int spear_ohci_hcd_drv_resume(struct platform_device *dev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(dev);
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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struct spear_ohci *sohci_p = to_spear_ohci(hcd);
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if (time_before(jiffies, ohci->next_statechange))
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msleep(5);
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ohci->next_statechange = jiffies;
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clk_prepare_enable(sohci_p->clk);
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ohci_resume(hcd, false);
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return 0;
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}
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#endif
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static const struct of_device_id spear_ohci_id_table[] = {
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{ .compatible = "st,spear600-ohci", },
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{ },
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};
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MODULE_DEVICE_TABLE(of, spear_ohci_id_table);
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/* Driver definition to register with the platform bus */
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static struct platform_driver spear_ohci_hcd_driver = {
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.probe = spear_ohci_hcd_drv_probe,
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.remove = spear_ohci_hcd_drv_remove,
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#ifdef CONFIG_PM
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.suspend = spear_ohci_hcd_drv_suspend,
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.resume = spear_ohci_hcd_drv_resume,
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#endif
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.driver = {
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.name = "spear-ohci",
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.of_match_table = spear_ohci_id_table,
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},
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};
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static const struct ohci_driver_overrides spear_overrides __initconst = {
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.extra_priv_size = sizeof(struct spear_ohci),
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};
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static int __init ohci_spear_init(void)
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{
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if (usb_disabled())
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return -ENODEV;
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pr_info("%s: " DRIVER_DESC "\n", hcd_name);
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ohci_init_driver(&ohci_spear_hc_driver, &spear_overrides);
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return platform_driver_register(&spear_ohci_hcd_driver);
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}
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module_init(ohci_spear_init);
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static void __exit ohci_spear_cleanup(void)
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{
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platform_driver_unregister(&spear_ohci_hcd_driver);
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}
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module_exit(ohci_spear_cleanup);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_AUTHOR("Deepak Sikri");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:spear-ohci");
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