4ac53087d6
As xhci_hcd is now allocated by usb_create_hcd(), we don't need to add the primary HCD before creating the shared HCD. Creating the shared HCD before adding the primary HCD is particularly useful for the OTG use case so that we know at the OTG core if the HCD is in single configuration or dual (primary + shared) configuration. Signed-off-by: Roger Quadros <rogerq@ti.com> [Mathias: rearranged to fit on top of the Marvell Armada 385 phy changes] Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
290 lines
7.1 KiB
C
290 lines
7.1 KiB
C
/*
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* xhci-plat.c - xHCI host controller driver platform Bus Glue.
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*
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* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
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* Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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*
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* A lot of code borrowed from the Linux xHCI driver.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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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/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/slab.h>
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#include <linux/usb/xhci_pdriver.h>
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#include "xhci.h"
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#include "xhci-mvebu.h"
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#include "xhci-rcar.h"
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static struct hc_driver __read_mostly xhci_plat_hc_driver;
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static int xhci_plat_setup(struct usb_hcd *hcd);
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static int xhci_plat_start(struct usb_hcd *hcd);
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static const struct xhci_driver_overrides xhci_plat_overrides __initconst = {
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.extra_priv_size = sizeof(struct xhci_hcd),
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.reset = xhci_plat_setup,
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.start = xhci_plat_start,
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};
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static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
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{
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/*
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* As of now platform drivers don't provide MSI support so we ensure
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* here that the generic code does not try to make a pci_dev from our
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* dev struct in order to setup MSI
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*/
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xhci->quirks |= XHCI_PLAT;
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}
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/* called during probe() after chip reset completes */
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static int xhci_plat_setup(struct usb_hcd *hcd)
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{
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struct device_node *of_node = hcd->self.controller->of_node;
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int ret;
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if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") ||
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of_device_is_compatible(of_node, "renesas,xhci-r8a7791")) {
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ret = xhci_rcar_init_quirk(hcd);
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if (ret)
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return ret;
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}
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return xhci_gen_setup(hcd, xhci_plat_quirks);
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}
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static int xhci_plat_start(struct usb_hcd *hcd)
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{
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struct device_node *of_node = hcd->self.controller->of_node;
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if (of_device_is_compatible(of_node, "renesas,xhci-r8a7790") ||
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of_device_is_compatible(of_node, "renesas,xhci-r8a7791"))
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xhci_rcar_start(hcd);
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return xhci_run(hcd);
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}
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static int xhci_plat_probe(struct platform_device *pdev)
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{
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struct device_node *node = pdev->dev.of_node;
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struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev);
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const struct hc_driver *driver;
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struct xhci_hcd *xhci;
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struct resource *res;
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struct usb_hcd *hcd;
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struct clk *clk;
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int ret;
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int irq;
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if (usb_disabled())
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return -ENODEV;
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driver = &xhci_plat_hc_driver;
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irq = platform_get_irq(pdev, 0);
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if (irq < 0)
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return -ENODEV;
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/* Initialize dma_mask and coherent_dma_mask to 32-bits */
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ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
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if (ret)
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return ret;
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if (!pdev->dev.dma_mask)
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pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
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else
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dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
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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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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 put_hcd;
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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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/*
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* Not all platforms have a clk so it is not an error if the
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* clock does not exists.
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*/
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clk = devm_clk_get(&pdev->dev, NULL);
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if (!IS_ERR(clk)) {
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ret = clk_prepare_enable(clk);
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if (ret)
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goto put_hcd;
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}
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if (of_device_is_compatible(pdev->dev.of_node,
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"marvell,armada-375-xhci") ||
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of_device_is_compatible(pdev->dev.of_node,
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"marvell,armada-380-xhci")) {
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ret = xhci_mvebu_mbus_init_quirk(pdev);
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if (ret)
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goto disable_clk;
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}
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device_wakeup_enable(hcd->self.controller);
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xhci = hcd_to_xhci(hcd);
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xhci->clk = clk;
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xhci->shared_hcd = usb_create_shared_hcd(driver, &pdev->dev,
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dev_name(&pdev->dev), hcd);
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if (!xhci->shared_hcd) {
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ret = -ENOMEM;
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goto disable_clk;
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}
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if ((node && of_property_read_bool(node, "usb3-lpm-capable")) ||
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(pdata && pdata->usb3_lpm_capable))
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xhci->quirks |= XHCI_LPM_SUPPORT;
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if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
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xhci->shared_hcd->can_do_streams = 1;
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hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
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if (IS_ERR(hcd->usb_phy)) {
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ret = PTR_ERR(hcd->usb_phy);
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if (ret == -EPROBE_DEFER)
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goto put_usb3_hcd;
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hcd->usb_phy = NULL;
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} else {
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ret = usb_phy_init(hcd->usb_phy);
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if (ret)
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goto put_usb3_hcd;
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}
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ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (ret)
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goto disable_usb_phy;
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ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
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if (ret)
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goto dealloc_usb2_hcd;
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return 0;
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dealloc_usb2_hcd:
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usb_remove_hcd(hcd);
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disable_usb_phy:
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usb_phy_shutdown(hcd->usb_phy);
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put_usb3_hcd:
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usb_put_hcd(xhci->shared_hcd);
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disable_clk:
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if (!IS_ERR(clk))
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clk_disable_unprepare(clk);
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put_hcd:
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usb_put_hcd(hcd);
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return ret;
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}
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static int xhci_plat_remove(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 xhci_hcd *xhci = hcd_to_xhci(hcd);
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struct clk *clk = xhci->clk;
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usb_remove_hcd(xhci->shared_hcd);
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usb_phy_shutdown(hcd->usb_phy);
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usb_remove_hcd(hcd);
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usb_put_hcd(xhci->shared_hcd);
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if (!IS_ERR(clk))
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clk_disable_unprepare(clk);
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usb_put_hcd(hcd);
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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static int xhci_plat_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 xhci_hcd *xhci = hcd_to_xhci(hcd);
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/*
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* xhci_suspend() needs `do_wakeup` to know whether host is allowed
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* to do wakeup during suspend. Since xhci_plat_suspend is currently
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* only designed for system suspend, device_may_wakeup() is enough
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* to dertermine whether host is allowed to do wakeup. Need to
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* reconsider this when xhci_plat_suspend enlarges its scope, e.g.,
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* also applies to runtime suspend.
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*/
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return xhci_suspend(xhci, device_may_wakeup(dev));
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}
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static int xhci_plat_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 xhci_hcd *xhci = hcd_to_xhci(hcd);
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return xhci_resume(xhci, 0);
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}
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static const struct dev_pm_ops xhci_plat_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
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};
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#define DEV_PM_OPS (&xhci_plat_pm_ops)
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#else
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#define DEV_PM_OPS NULL
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#endif /* CONFIG_PM */
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#ifdef CONFIG_OF
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static const struct of_device_id usb_xhci_of_match[] = {
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{ .compatible = "generic-xhci" },
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{ .compatible = "xhci-platform" },
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{ .compatible = "marvell,armada-375-xhci"},
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{ .compatible = "marvell,armada-380-xhci"},
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{ .compatible = "renesas,xhci-r8a7790"},
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{ .compatible = "renesas,xhci-r8a7791"},
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{ },
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};
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MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
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#endif
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static struct platform_driver usb_xhci_driver = {
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.probe = xhci_plat_probe,
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.remove = xhci_plat_remove,
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.driver = {
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.name = "xhci-hcd",
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.pm = DEV_PM_OPS,
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.of_match_table = of_match_ptr(usb_xhci_of_match),
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},
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};
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MODULE_ALIAS("platform:xhci-hcd");
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static int __init xhci_plat_init(void)
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{
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xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides);
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return platform_driver_register(&usb_xhci_driver);
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}
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module_init(xhci_plat_init);
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static void __exit xhci_plat_exit(void)
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{
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platform_driver_unregister(&usb_xhci_driver);
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}
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module_exit(xhci_plat_exit);
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MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
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MODULE_LICENSE("GPL");
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