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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>
212 lines
4.9 KiB
C
212 lines
4.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/usb/otg.h>
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#include <linux/usb/ulpi.h>
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#include <linux/slab.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include <linux/platform_data/usb-ehci-mxc.h>
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#include "ehci.h"
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#define DRIVER_DESC "Freescale On-Chip EHCI Host driver"
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static const char hcd_name[] = "ehci-mxc";
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#define ULPI_VIEWPORT_OFFSET 0x170
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struct ehci_mxc_priv {
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struct clk *usbclk, *ahbclk, *phyclk;
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};
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static struct hc_driver __read_mostly ehci_mxc_hc_driver;
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static const struct ehci_driver_overrides ehci_mxc_overrides __initconst = {
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.extra_priv_size = sizeof(struct ehci_mxc_priv),
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};
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static int ehci_mxc_drv_probe(struct platform_device *pdev)
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{
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struct mxc_usbh_platform_data *pdata = dev_get_platdata(&pdev->dev);
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struct usb_hcd *hcd;
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struct resource *res;
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int irq, ret;
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struct ehci_mxc_priv *priv;
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struct device *dev = &pdev->dev;
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struct ehci_hcd *ehci;
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if (!pdata) {
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dev_err(dev, "No platform data given, bailing out.\n");
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return -EINVAL;
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}
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irq = platform_get_irq(pdev, 0);
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hcd = usb_create_hcd(&ehci_mxc_hc_driver, dev, dev_name(dev));
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if (!hcd)
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return -ENOMEM;
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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 err_alloc;
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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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hcd->has_tt = 1;
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ehci = hcd_to_ehci(hcd);
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priv = (struct ehci_mxc_priv *) ehci->priv;
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/* enable clocks */
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priv->usbclk = devm_clk_get(&pdev->dev, "ipg");
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if (IS_ERR(priv->usbclk)) {
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ret = PTR_ERR(priv->usbclk);
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goto err_alloc;
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}
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clk_prepare_enable(priv->usbclk);
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priv->ahbclk = devm_clk_get(&pdev->dev, "ahb");
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if (IS_ERR(priv->ahbclk)) {
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ret = PTR_ERR(priv->ahbclk);
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goto err_clk_ahb;
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}
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clk_prepare_enable(priv->ahbclk);
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/* "dr" device has its own clock on i.MX51 */
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priv->phyclk = devm_clk_get(&pdev->dev, "phy");
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if (IS_ERR(priv->phyclk))
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priv->phyclk = NULL;
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if (priv->phyclk)
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clk_prepare_enable(priv->phyclk);
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/* call platform specific init function */
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if (pdata->init) {
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ret = pdata->init(pdev);
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if (ret) {
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dev_err(dev, "platform init failed\n");
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goto err_init;
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}
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/* platforms need some time to settle changed IO settings */
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mdelay(10);
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}
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/* EHCI registers start at offset 0x100 */
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ehci->caps = hcd->regs + 0x100;
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ehci->regs = hcd->regs + 0x100 +
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HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
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/* set up the PORTSCx register */
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ehci_writel(ehci, pdata->portsc, &ehci->regs->port_status[0]);
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/* is this really needed? */
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msleep(10);
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/* Initialize the transceiver */
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if (pdata->otg) {
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pdata->otg->io_priv = hcd->regs + ULPI_VIEWPORT_OFFSET;
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ret = usb_phy_init(pdata->otg);
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if (ret) {
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dev_err(dev, "unable to init transceiver, probably missing\n");
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ret = -ENODEV;
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goto err_add;
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}
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ret = otg_set_vbus(pdata->otg->otg, 1);
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if (ret) {
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dev_err(dev, "unable to enable vbus on transceiver\n");
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goto err_add;
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}
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}
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platform_set_drvdata(pdev, hcd);
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ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (ret)
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goto err_add;
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device_wakeup_enable(hcd->self.controller);
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return 0;
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err_add:
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if (pdata && pdata->exit)
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pdata->exit(pdev);
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err_init:
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if (priv->phyclk)
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clk_disable_unprepare(priv->phyclk);
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clk_disable_unprepare(priv->ahbclk);
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err_clk_ahb:
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clk_disable_unprepare(priv->usbclk);
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err_alloc:
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usb_put_hcd(hcd);
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return ret;
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}
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static int ehci_mxc_drv_remove(struct platform_device *pdev)
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{
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struct mxc_usbh_platform_data *pdata = dev_get_platdata(&pdev->dev);
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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struct ehci_mxc_priv *priv = (struct ehci_mxc_priv *) ehci->priv;
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usb_remove_hcd(hcd);
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if (pdata && pdata->exit)
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pdata->exit(pdev);
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if (pdata && pdata->otg)
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usb_phy_shutdown(pdata->otg);
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clk_disable_unprepare(priv->usbclk);
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clk_disable_unprepare(priv->ahbclk);
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if (priv->phyclk)
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clk_disable_unprepare(priv->phyclk);
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usb_put_hcd(hcd);
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return 0;
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}
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MODULE_ALIAS("platform:mxc-ehci");
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static struct platform_driver ehci_mxc_driver = {
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.probe = ehci_mxc_drv_probe,
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.remove = ehci_mxc_drv_remove,
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.shutdown = usb_hcd_platform_shutdown,
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.driver = {
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.name = "mxc-ehci",
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},
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};
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static int __init ehci_mxc_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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ehci_init_driver(&ehci_mxc_hc_driver, &ehci_mxc_overrides);
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return platform_driver_register(&ehci_mxc_driver);
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}
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module_init(ehci_mxc_init);
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static void __exit ehci_mxc_cleanup(void)
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{
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platform_driver_unregister(&ehci_mxc_driver);
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}
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module_exit(ehci_mxc_cleanup);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_AUTHOR("Sascha Hauer");
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MODULE_LICENSE("GPL");
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