546 lines
12 KiB
C
546 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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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 - https://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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#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/pci.h>
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#include <linux/of.h>
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#include <linux/of_device.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/acpi.h>
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#include <linux/usb/of.h>
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#include <linux/reset.h>
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#include "xhci.h"
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#include "xhci-plat.h"
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#include "xhci-mvebu.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_plat_priv),
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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_priv_plat_start(struct usb_hcd *hcd)
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{
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struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
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if (priv->plat_start)
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priv->plat_start(hcd);
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}
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static int xhci_priv_init_quirk(struct usb_hcd *hcd)
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{
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struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
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if (!priv->init_quirk)
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return 0;
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return priv->init_quirk(hcd);
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}
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static int xhci_priv_suspend_quirk(struct usb_hcd *hcd)
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{
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struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
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if (!priv->suspend_quirk)
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return 0;
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return priv->suspend_quirk(hcd);
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}
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static int xhci_priv_resume_quirk(struct usb_hcd *hcd)
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{
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struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
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if (!priv->resume_quirk)
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return 0;
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return priv->resume_quirk(hcd);
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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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struct xhci_plat_priv *priv = xhci_to_priv(xhci);
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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 | priv->quirks;
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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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int ret;
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ret = xhci_priv_init_quirk(hcd);
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if (ret)
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return ret;
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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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xhci_priv_plat_start(hcd);
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return xhci_run(hcd);
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}
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#ifdef CONFIG_OF
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static const struct xhci_plat_priv xhci_plat_marvell_armada = {
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.init_quirk = xhci_mvebu_mbus_init_quirk,
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};
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static const struct xhci_plat_priv xhci_plat_marvell_armada3700 = {
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.init_quirk = xhci_mvebu_a3700_init_quirk,
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};
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static const struct xhci_plat_priv xhci_plat_brcm = {
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.quirks = XHCI_RESET_ON_RESUME | XHCI_SUSPEND_RESUME_CLKS,
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};
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static const struct of_device_id usb_xhci_of_match[] = {
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{
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.compatible = "generic-xhci",
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}, {
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.compatible = "xhci-platform",
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}, {
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.compatible = "marvell,armada-375-xhci",
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.data = &xhci_plat_marvell_armada,
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}, {
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.compatible = "marvell,armada-380-xhci",
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.data = &xhci_plat_marvell_armada,
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}, {
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.compatible = "marvell,armada3700-xhci",
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.data = &xhci_plat_marvell_armada3700,
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}, {
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.compatible = "brcm,xhci-brcm-v2",
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.data = &xhci_plat_brcm,
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}, {
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.compatible = "brcm,bcm7445-xhci",
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.data = &xhci_plat_brcm,
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},
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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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int xhci_plat_probe(struct platform_device *pdev, struct device *sysdev, const struct xhci_plat_priv *priv_match)
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{
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const struct hc_driver *driver;
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struct device *tmpdev;
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struct xhci_hcd *xhci;
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struct resource *res;
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struct usb_hcd *hcd, *usb3_hcd;
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int ret;
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int irq;
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struct xhci_plat_priv *priv = NULL;
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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 irq;
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if (!sysdev)
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sysdev = &pdev->dev;
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ret = dma_set_mask_and_coherent(sysdev, DMA_BIT_MASK(64));
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if (ret)
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return ret;
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pm_runtime_set_active(&pdev->dev);
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pm_runtime_enable(&pdev->dev);
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pm_runtime_get_noresume(&pdev->dev);
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hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
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dev_name(&pdev->dev), NULL);
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if (!hcd) {
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ret = -ENOMEM;
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goto disable_runtime;
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}
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hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &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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xhci = hcd_to_xhci(hcd);
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xhci->allow_single_roothub = 1;
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/*
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* Not all platforms have clks so it is not an error if the
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* clock do not exist.
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*/
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xhci->reg_clk = devm_clk_get_optional(&pdev->dev, "reg");
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if (IS_ERR(xhci->reg_clk)) {
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ret = PTR_ERR(xhci->reg_clk);
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goto put_hcd;
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}
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xhci->clk = devm_clk_get_optional(&pdev->dev, NULL);
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if (IS_ERR(xhci->clk)) {
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ret = PTR_ERR(xhci->clk);
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goto put_hcd;
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}
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xhci->reset = devm_reset_control_array_get_optional_shared(&pdev->dev);
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if (IS_ERR(xhci->reset)) {
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ret = PTR_ERR(xhci->reset);
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goto put_hcd;
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}
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ret = reset_control_deassert(xhci->reset);
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if (ret)
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goto put_hcd;
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ret = clk_prepare_enable(xhci->reg_clk);
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if (ret)
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goto err_reset;
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ret = clk_prepare_enable(xhci->clk);
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if (ret)
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goto disable_reg_clk;
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if (priv_match) {
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priv = hcd_to_xhci_priv(hcd);
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/* Just copy data for now */
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*priv = *priv_match;
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}
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device_set_wakeup_capable(&pdev->dev, true);
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xhci->main_hcd = hcd;
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/* imod_interval is the interrupt moderation value in nanoseconds. */
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xhci->imod_interval = 40000;
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/* Iterate over all parent nodes for finding quirks */
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for (tmpdev = &pdev->dev; tmpdev; tmpdev = tmpdev->parent) {
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if (device_property_read_bool(tmpdev, "usb2-lpm-disable"))
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xhci->quirks |= XHCI_HW_LPM_DISABLE;
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if (device_property_read_bool(tmpdev, "usb3-lpm-capable"))
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xhci->quirks |= XHCI_LPM_SUPPORT;
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if (device_property_read_bool(tmpdev, "quirk-broken-port-ped"))
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xhci->quirks |= XHCI_BROKEN_PORT_PED;
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device_property_read_u32(tmpdev, "imod-interval-ns",
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&xhci->imod_interval);
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}
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hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, "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 disable_clk;
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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 disable_clk;
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}
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hcd->tpl_support = of_usb_host_tpl_support(sysdev->of_node);
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if (priv && (priv->quirks & XHCI_SKIP_PHY_INIT))
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hcd->skip_phy_initialization = 1;
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if (priv && (priv->quirks & XHCI_SG_TRB_CACHE_SIZE_QUIRK))
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xhci->quirks |= XHCI_SG_TRB_CACHE_SIZE_QUIRK;
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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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if (!xhci_has_one_roothub(xhci)) {
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xhci->shared_hcd = __usb_create_hcd(driver, sysdev, &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 dealloc_usb2_hcd;
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}
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xhci->shared_hcd->tpl_support = hcd->tpl_support;
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}
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usb3_hcd = xhci_get_usb3_hcd(xhci);
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if (usb3_hcd && HCC_MAX_PSA(xhci->hcc_params) >= 4)
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usb3_hcd->can_do_streams = 1;
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if (xhci->shared_hcd) {
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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 put_usb3_hcd;
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}
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device_enable_async_suspend(&pdev->dev);
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pm_runtime_put_noidle(&pdev->dev);
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/*
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* Prevent runtime pm from being on as default, users should enable
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* runtime pm using power/control in sysfs.
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*/
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pm_runtime_forbid(&pdev->dev);
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return 0;
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put_usb3_hcd:
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usb_put_hcd(xhci->shared_hcd);
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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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disable_clk:
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clk_disable_unprepare(xhci->clk);
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disable_reg_clk:
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clk_disable_unprepare(xhci->reg_clk);
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err_reset:
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reset_control_assert(xhci->reset);
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put_hcd:
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usb_put_hcd(hcd);
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disable_runtime:
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pm_runtime_put_noidle(&pdev->dev);
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pm_runtime_disable(&pdev->dev);
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return ret;
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}
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EXPORT_SYMBOL_GPL(xhci_plat_probe);
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static int xhci_generic_plat_probe(struct platform_device *pdev)
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{
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const struct xhci_plat_priv *priv_match;
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struct device *sysdev;
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int ret;
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/*
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* sysdev must point to a device that is known to the system firmware
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* or PCI hardware. We handle these three cases here:
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* 1. xhci_plat comes from firmware
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* 2. xhci_plat is child of a device from firmware (dwc3-plat)
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* 3. xhci_plat is grandchild of a pci device (dwc3-pci)
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*/
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for (sysdev = &pdev->dev; sysdev; sysdev = sysdev->parent) {
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if (is_of_node(sysdev->fwnode) ||
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is_acpi_device_node(sysdev->fwnode))
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break;
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#ifdef CONFIG_PCI
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else if (sysdev->bus == &pci_bus_type)
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break;
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#endif
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}
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if (!sysdev)
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sysdev = &pdev->dev;
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if (WARN_ON(!sysdev->dma_mask)) {
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/* Platform did not initialize dma_mask */
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ret = dma_coerce_mask_and_coherent(sysdev, DMA_BIT_MASK(64));
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if (ret)
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return ret;
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}
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if (pdev->dev.of_node)
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priv_match = of_device_get_match_data(&pdev->dev);
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else
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priv_match = dev_get_platdata(&pdev->dev);
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return xhci_plat_probe(pdev, sysdev, priv_match);
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}
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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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struct clk *reg_clk = xhci->reg_clk;
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struct usb_hcd *shared_hcd = xhci->shared_hcd;
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pm_runtime_get_sync(&dev->dev);
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xhci->xhc_state |= XHCI_STATE_REMOVING;
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if (shared_hcd) {
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usb_remove_hcd(shared_hcd);
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xhci->shared_hcd = NULL;
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}
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usb_phy_shutdown(hcd->usb_phy);
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usb_remove_hcd(hcd);
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if (shared_hcd)
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usb_put_hcd(shared_hcd);
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clk_disable_unprepare(clk);
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clk_disable_unprepare(reg_clk);
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reset_control_assert(xhci->reset);
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usb_put_hcd(hcd);
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pm_runtime_disable(&dev->dev);
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pm_runtime_put_noidle(&dev->dev);
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pm_runtime_set_suspended(&dev->dev);
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return 0;
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}
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EXPORT_SYMBOL_GPL(xhci_plat_remove);
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static int __maybe_unused 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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int ret;
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if (pm_runtime_suspended(dev))
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pm_runtime_resume(dev);
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ret = xhci_priv_suspend_quirk(hcd);
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if (ret)
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return ret;
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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.
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*/
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ret = xhci_suspend(xhci, device_may_wakeup(dev));
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if (ret)
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return ret;
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if (!device_may_wakeup(dev) && (xhci->quirks & XHCI_SUSPEND_RESUME_CLKS)) {
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clk_disable_unprepare(xhci->clk);
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clk_disable_unprepare(xhci->reg_clk);
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}
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return 0;
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}
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static int __maybe_unused 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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int ret;
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if (!device_may_wakeup(dev) && (xhci->quirks & XHCI_SUSPEND_RESUME_CLKS)) {
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clk_prepare_enable(xhci->clk);
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clk_prepare_enable(xhci->reg_clk);
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}
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ret = xhci_priv_resume_quirk(hcd);
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if (ret)
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return ret;
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ret = xhci_resume(xhci, 0);
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if (ret)
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return ret;
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pm_runtime_disable(dev);
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pm_runtime_set_active(dev);
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pm_runtime_enable(dev);
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return 0;
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}
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static int __maybe_unused xhci_plat_runtime_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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int ret;
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ret = xhci_priv_suspend_quirk(hcd);
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if (ret)
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return ret;
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return xhci_suspend(xhci, true);
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}
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static int __maybe_unused xhci_plat_runtime_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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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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SET_RUNTIME_PM_OPS(xhci_plat_runtime_suspend,
|
|
xhci_plat_runtime_resume,
|
|
NULL)
|
|
};
|
|
EXPORT_SYMBOL_GPL(xhci_plat_pm_ops);
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static const struct acpi_device_id usb_xhci_acpi_match[] = {
|
|
/* XHCI-compliant USB Controller */
|
|
{ "PNP0D10", },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);
|
|
#endif
|
|
|
|
static struct platform_driver usb_generic_xhci_driver = {
|
|
.probe = xhci_generic_plat_probe,
|
|
.remove = xhci_plat_remove,
|
|
.shutdown = usb_hcd_platform_shutdown,
|
|
.driver = {
|
|
.name = "xhci-hcd",
|
|
.pm = &xhci_plat_pm_ops,
|
|
.of_match_table = of_match_ptr(usb_xhci_of_match),
|
|
.acpi_match_table = ACPI_PTR(usb_xhci_acpi_match),
|
|
},
|
|
};
|
|
MODULE_ALIAS("platform:xhci-hcd");
|
|
|
|
static int __init xhci_plat_init(void)
|
|
{
|
|
xhci_init_driver(&xhci_plat_hc_driver, &xhci_plat_overrides);
|
|
return platform_driver_register(&usb_generic_xhci_driver);
|
|
}
|
|
module_init(xhci_plat_init);
|
|
|
|
static void __exit xhci_plat_exit(void)
|
|
{
|
|
platform_driver_unregister(&usb_generic_xhci_driver);
|
|
}
|
|
module_exit(xhci_plat_exit);
|
|
|
|
MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
|
|
MODULE_LICENSE("GPL");
|