+++ /dev/null
-/* ehci-msm.c - HSUSB Host Controller Driver Implementation
- *
- * Copyright (c) 2008-2011, Code Aurora Forum. All rights reserved.
- *
- * Partly derived from ehci-fsl.c and ehci-hcd.c
- * Copyright (c) 2000-2004 by David Brownell
- * Copyright (c) 2005 MontaVista Software
- *
- * All source code in this file is licensed under the following license except
- * where indicated.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * See the GNU General Public License for more details.
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, you can find it at http://www.fsf.org
- */
-
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/pm_runtime.h>
-#include <linux/usb/otg.h>
-#include <linux/usb/msm_hsusb_hw.h>
-#include <linux/usb.h>
-#include <linux/usb/hcd.h>
-#include <linux/acpi.h>
-
-#include "ehci.h"
-
-#define MSM_USB_BASE (hcd->regs)
-
-#define DRIVER_DESC "Qualcomm On-Chip EHCI Host Controller"
-
-static const char hcd_name[] = "ehci-msm";
-static struct hc_driver __read_mostly msm_hc_driver;
-
-static int ehci_msm_reset(struct usb_hcd *hcd)
-{
- struct ehci_hcd *ehci = hcd_to_ehci(hcd);
- int retval;
-
- ehci->caps = USB_CAPLENGTH;
- hcd->has_tt = 1;
-
- retval = ehci_setup(hcd);
- if (retval)
- return retval;
-
- /* select ULPI phy and clear other status/control bits in PORTSC */
- writel(PORTSC_PTS_ULPI, USB_PORTSC);
- /* bursts of unspecified length. */
- writel(0, USB_AHBBURST);
- /* Use the AHB transactor, allow posted data writes */
- writel(0x8, USB_AHBMODE);
- /* Disable streaming mode and select host mode */
- writel(0x13, USB_USBMODE);
- /* Disable ULPI_TX_PKT_EN_CLR_FIX which is valid only for HSIC */
- writel(readl(USB_GENCONFIG_2) & ~ULPI_TX_PKT_EN_CLR_FIX, USB_GENCONFIG_2);
-
- return 0;
-}
-
-static int ehci_msm_probe(struct platform_device *pdev)
-{
- struct usb_hcd *hcd;
- struct resource *res;
- struct usb_phy *phy;
- int ret;
-
- dev_dbg(&pdev->dev, "ehci_msm proble\n");
-
- hcd = usb_create_hcd(&msm_hc_driver, &pdev->dev, dev_name(&pdev->dev));
- if (!hcd) {
- dev_err(&pdev->dev, "Unable to create HCD\n");
- return -ENOMEM;
- }
-
- ret = platform_get_irq(pdev, 0);
- if (ret < 0) {
- dev_err(&pdev->dev, "Unable to get IRQ resource\n");
- goto put_hcd;
- }
- hcd->irq = ret;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "Unable to get memory resource\n");
- ret = -ENODEV;
- goto put_hcd;
- }
-
- hcd->rsrc_start = res->start;
- hcd->rsrc_len = resource_size(res);
- hcd->regs = devm_ioremap(&pdev->dev, hcd->rsrc_start, hcd->rsrc_len);
- if (!hcd->regs) {
- dev_err(&pdev->dev, "ioremap failed\n");
- ret = -ENOMEM;
- goto put_hcd;
- }
-
- /*
- * If there is an OTG driver, let it take care of PHY initialization,
- * clock management, powering up VBUS, mapping of registers address
- * space and power management.
- */
- if (pdev->dev.of_node)
- phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
- else
- phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
-
- if (IS_ERR(phy)) {
- if (PTR_ERR(phy) == -EPROBE_DEFER) {
- dev_err(&pdev->dev, "unable to find transceiver\n");
- ret = -EPROBE_DEFER;
- goto put_hcd;
- }
- phy = NULL;
- }
-
- hcd->usb_phy = phy;
- device_init_wakeup(&pdev->dev, 1);
-
- if (phy && phy->otg) {
- /*
- * MSM OTG driver takes care of adding the HCD and
- * placing hardware into low power mode via runtime PM.
- */
- ret = otg_set_host(phy->otg, &hcd->self);
- if (ret < 0) {
- dev_err(&pdev->dev, "unable to register with transceiver\n");
- goto put_hcd;
- }
-
- pm_runtime_no_callbacks(&pdev->dev);
- pm_runtime_enable(&pdev->dev);
- } else {
- ret = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
- if (ret)
- goto put_hcd;
- }
-
- return 0;
-
-put_hcd:
- usb_put_hcd(hcd);
-
- return ret;
-}
-
-static int ehci_msm_remove(struct platform_device *pdev)
-{
- struct usb_hcd *hcd = platform_get_drvdata(pdev);
-
- device_init_wakeup(&pdev->dev, 0);
- pm_runtime_disable(&pdev->dev);
- pm_runtime_set_suspended(&pdev->dev);
-
- if (hcd->usb_phy && hcd->usb_phy->otg)
- otg_set_host(hcd->usb_phy->otg, NULL);
- else
- usb_remove_hcd(hcd);
-
- usb_put_hcd(hcd);
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int ehci_msm_pm_suspend(struct device *dev)
-{
- struct usb_hcd *hcd = dev_get_drvdata(dev);
- struct ehci_hcd *ehci = hcd_to_ehci(hcd);
- bool do_wakeup = device_may_wakeup(dev);
-
- dev_dbg(dev, "ehci-msm PM suspend\n");
-
- /* Only call ehci_suspend if ehci_setup has been done */
- if (ehci->sbrn)
- return ehci_suspend(hcd, do_wakeup);
-
- return 0;
-}
-
-static int ehci_msm_pm_resume(struct device *dev)
-{
- struct usb_hcd *hcd = dev_get_drvdata(dev);
- struct ehci_hcd *ehci = hcd_to_ehci(hcd);
-
- dev_dbg(dev, "ehci-msm PM resume\n");
-
- /* Only call ehci_resume if ehci_setup has been done */
- if (ehci->sbrn)
- ehci_resume(hcd, false);
-
- return 0;
-}
-
-#else
-#define ehci_msm_pm_suspend NULL
-#define ehci_msm_pm_resume NULL
-#endif
-
-static const struct dev_pm_ops ehci_msm_dev_pm_ops = {
- .suspend = ehci_msm_pm_suspend,
- .resume = ehci_msm_pm_resume,
-};
-
-static const struct acpi_device_id msm_ehci_acpi_ids[] = {
- { "QCOM8040", 0 },
- { }
-};
-MODULE_DEVICE_TABLE(acpi, msm_ehci_acpi_ids);
-
-static const struct of_device_id msm_ehci_dt_match[] = {
- { .compatible = "qcom,ehci-host", },
- {}
-};
-MODULE_DEVICE_TABLE(of, msm_ehci_dt_match);
-
-static struct platform_driver ehci_msm_driver = {
- .probe = ehci_msm_probe,
- .remove = ehci_msm_remove,
- .shutdown = usb_hcd_platform_shutdown,
- .driver = {
- .name = "msm_hsusb_host",
- .pm = &ehci_msm_dev_pm_ops,
- .of_match_table = msm_ehci_dt_match,
- .acpi_match_table = ACPI_PTR(msm_ehci_acpi_ids),
- },
-};
-
-static const struct ehci_driver_overrides msm_overrides __initconst = {
- .reset = ehci_msm_reset,
-};
-
-static int __init ehci_msm_init(void)
-{
- if (usb_disabled())
- return -ENODEV;
-
- pr_info("%s: " DRIVER_DESC "\n", hcd_name);
- ehci_init_driver(&msm_hc_driver, &msm_overrides);
- return platform_driver_register(&ehci_msm_driver);
-}
-module_init(ehci_msm_init);
-
-static void __exit ehci_msm_cleanup(void)
-{
- platform_driver_unregister(&ehci_msm_driver);
-}
-module_exit(ehci_msm_cleanup);
-
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_ALIAS("platform:msm-ehci");
-MODULE_LICENSE("GPL");
projects / platform / kernel / linux-starfive.git / commitdiff