forked from luck/tmp_suning_uos_patched
3c9740a117
Individual controller driver has different requirement for wakeup setting, so move it from core to itself. In order to align with current etting the default wakeup setting is enabled (except for chipidea host). Pass compile test with below commands: make O=outout/all allmodconfig make -j$CPU_NUM O=outout/all drivers/usb Signed-off-by: Peter Chen <peter.chen@freescale.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
287 lines
6.8 KiB
C
287 lines
6.8 KiB
C
/*
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* SAMSUNG EXYNOS USB HOST OHCI Controller
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*
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* Copyright (C) 2011 Samsung Electronics Co.Ltd
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* Author: Jingoo Han <jg1.han@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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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/usb/phy.h>
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#include <linux/usb/samsung_usb_phy.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include <linux/usb/otg.h>
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#include "ohci.h"
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#define DRIVER_DESC "OHCI EXYNOS driver"
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static const char hcd_name[] = "ohci-exynos";
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static struct hc_driver __read_mostly exynos_ohci_hc_driver;
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#define to_exynos_ohci(hcd) (struct exynos_ohci_hcd *)(hcd_to_ohci(hcd)->priv)
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struct exynos_ohci_hcd {
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struct clk *clk;
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struct usb_phy *phy;
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struct usb_otg *otg;
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};
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static void exynos_ohci_phy_enable(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 exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
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if (exynos_ohci->phy)
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usb_phy_init(exynos_ohci->phy);
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}
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static void exynos_ohci_phy_disable(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 exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
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if (exynos_ohci->phy)
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usb_phy_shutdown(exynos_ohci->phy);
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}
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static int exynos_ohci_probe(struct platform_device *pdev)
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{
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struct exynos_ohci_hcd *exynos_ohci;
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struct usb_hcd *hcd;
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struct resource *res;
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struct usb_phy *phy;
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int irq;
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int err;
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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 move to full device tree support this will vanish off.
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*/
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err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
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if (err)
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return err;
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hcd = usb_create_hcd(&exynos_ohci_hc_driver,
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&pdev->dev, dev_name(&pdev->dev));
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if (!hcd) {
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dev_err(&pdev->dev, "Unable to create HCD\n");
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return -ENOMEM;
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}
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exynos_ohci = to_exynos_ohci(hcd);
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if (of_device_is_compatible(pdev->dev.of_node,
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"samsung,exynos5440-ohci"))
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goto skip_phy;
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phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
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if (IS_ERR(phy)) {
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usb_put_hcd(hcd);
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dev_warn(&pdev->dev, "no platform data or transceiver defined\n");
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return -EPROBE_DEFER;
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} else {
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exynos_ohci->phy = phy;
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exynos_ohci->otg = phy->otg;
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}
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skip_phy:
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exynos_ohci->clk = devm_clk_get(&pdev->dev, "usbhost");
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if (IS_ERR(exynos_ohci->clk)) {
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dev_err(&pdev->dev, "Failed to get usbhost clock\n");
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err = PTR_ERR(exynos_ohci->clk);
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goto fail_clk;
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}
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err = clk_prepare_enable(exynos_ohci->clk);
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if (err)
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goto fail_clk;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(&pdev->dev, "Failed to get I/O memory\n");
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err = -ENXIO;
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goto fail_io;
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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->regs = devm_ioremap(&pdev->dev, res->start, hcd->rsrc_len);
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if (!hcd->regs) {
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dev_err(&pdev->dev, "Failed to remap I/O memory\n");
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err = -ENOMEM;
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goto fail_io;
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}
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irq = platform_get_irq(pdev, 0);
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if (!irq) {
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dev_err(&pdev->dev, "Failed to get IRQ\n");
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err = -ENODEV;
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goto fail_io;
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}
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if (exynos_ohci->otg)
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exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
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platform_set_drvdata(pdev, hcd);
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exynos_ohci_phy_enable(pdev);
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err = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (err) {
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dev_err(&pdev->dev, "Failed to add USB HCD\n");
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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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return 0;
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fail_add_hcd:
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exynos_ohci_phy_disable(pdev);
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fail_io:
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clk_disable_unprepare(exynos_ohci->clk);
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fail_clk:
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usb_put_hcd(hcd);
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return err;
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}
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static int exynos_ohci_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 exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
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usb_remove_hcd(hcd);
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if (exynos_ohci->otg)
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exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
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exynos_ohci_phy_disable(pdev);
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clk_disable_unprepare(exynos_ohci->clk);
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usb_put_hcd(hcd);
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return 0;
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}
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static void exynos_ohci_shutdown(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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if (hcd->driver->shutdown)
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hcd->driver->shutdown(hcd);
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}
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#ifdef CONFIG_PM
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static int exynos_ohci_suspend(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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struct platform_device *pdev = to_platform_device(dev);
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bool do_wakeup = device_may_wakeup(dev);
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unsigned long flags;
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int rc = ohci_suspend(hcd, do_wakeup);
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if (rc)
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return rc;
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spin_lock_irqsave(&ohci->lock, flags);
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if (exynos_ohci->otg)
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exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
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exynos_ohci_phy_disable(pdev);
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clk_disable_unprepare(exynos_ohci->clk);
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spin_unlock_irqrestore(&ohci->lock, flags);
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return 0;
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}
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static int exynos_ohci_resume(struct device *dev)
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{
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struct usb_hcd *hcd = dev_get_drvdata(dev);
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struct exynos_ohci_hcd *exynos_ohci = to_exynos_ohci(hcd);
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struct platform_device *pdev = to_platform_device(dev);
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clk_prepare_enable(exynos_ohci->clk);
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if (exynos_ohci->otg)
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exynos_ohci->otg->set_host(exynos_ohci->otg, &hcd->self);
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exynos_ohci_phy_enable(pdev);
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ohci_resume(hcd, false);
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return 0;
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}
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#else
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#define exynos_ohci_suspend NULL
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#define exynos_ohci_resume NULL
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#endif
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static const struct ohci_driver_overrides exynos_overrides __initconst = {
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.extra_priv_size = sizeof(struct exynos_ohci_hcd),
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};
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static const struct dev_pm_ops exynos_ohci_pm_ops = {
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.suspend = exynos_ohci_suspend,
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.resume = exynos_ohci_resume,
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};
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#ifdef CONFIG_OF
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static const struct of_device_id exynos_ohci_match[] = {
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{ .compatible = "samsung,exynos4210-ohci" },
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{ .compatible = "samsung,exynos5440-ohci" },
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{},
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};
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MODULE_DEVICE_TABLE(of, exynos_ohci_match);
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#endif
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static struct platform_driver exynos_ohci_driver = {
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.probe = exynos_ohci_probe,
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.remove = exynos_ohci_remove,
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.shutdown = exynos_ohci_shutdown,
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.driver = {
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.name = "exynos-ohci",
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.owner = THIS_MODULE,
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.pm = &exynos_ohci_pm_ops,
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.of_match_table = of_match_ptr(exynos_ohci_match),
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}
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};
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static int __init ohci_exynos_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(&exynos_ohci_hc_driver, &exynos_overrides);
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return platform_driver_register(&exynos_ohci_driver);
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}
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module_init(ohci_exynos_init);
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static void __exit ohci_exynos_cleanup(void)
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{
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platform_driver_unregister(&exynos_ohci_driver);
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}
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module_exit(ohci_exynos_cleanup);
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MODULE_ALIAS("platform:exynos-ohci");
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MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
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MODULE_LICENSE("GPL v2");
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