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