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/*
* xhci-plat.c - xHCI host controller driver platform Bus Glue.
*
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
* Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*
* A lot of code borrowed from the Linux xHCI driver.
*
* 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.
*/
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/usb/phy.h>
#include <linux/slab.h>
#include <linux/acpi.h>
#include "xhci.h"
#include "xhci-plat.h"
#include "xhci-mvebu.h"
#include "xhci-rcar.h"
static struct hc_driver __read_mostly xhci_plat_hc_driver;
static int xhci_plat_setup(struct usb_hcd *hcd);
static int xhci_plat_start(struct usb_hcd *hcd);
static const struct xhci_driver_overrides xhci_plat_overrides __initconst = {
.extra_priv_size = sizeof(struct xhci_plat_priv),
.reset = xhci_plat_setup,
.start = xhci_plat_start,
};
static void xhci_priv_plat_start(struct usb_hcd *hcd)
{
struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
if (priv->plat_start)
priv->plat_start(hcd);
}
static int xhci_priv_init_quirk(struct usb_hcd *hcd)
{
struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
if (!priv->init_quirk)
return 0;
return priv->init_quirk(hcd);
}
static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
{
/*
* As of now platform drivers don't provide MSI support so we ensure
* here that the generic code does not try to make a pci_dev from our
* dev struct in order to setup MSI
*/
xhci->quirks |= XHCI_PLAT;
}
/* called during probe() after chip reset completes */
static int xhci_plat_setup(struct usb_hcd *hcd)
{
int ret;
ret = xhci_priv_init_quirk(hcd);
if (ret)
return ret;
return xhci_gen_setup(hcd, xhci_plat_quirks);
}
static int xhci_plat_start(struct usb_hcd *hcd)
{
xhci_priv_plat_start(hcd);
return xhci_run(hcd);
}
#ifdef CONFIG_OF
static const struct xhci_plat_priv xhci_plat_marvell_armada = {
.init_quirk = xhci_mvebu_mbus_init_quirk,
};
static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V1,
.init_quirk = xhci_rcar_init_quirk,
.plat_start = xhci_rcar_start,
};
static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2,
.init_quirk = xhci_rcar_init_quirk,
.plat_start = xhci_rcar_start,
};
static const struct of_device_id usb_xhci_of_match[] = {
{
.compatible = "generic-xhci",
}, {
.compatible = "xhci-platform",
}, {
.compatible = "marvell,armada-375-xhci",
.data = &xhci_plat_marvell_armada,
}, {
.compatible = "marvell,armada-380-xhci",
.data = &xhci_plat_marvell_armada,
}, {
.compatible = "renesas,xhci-r8a7790",
.data = &xhci_plat_renesas_rcar_gen2,
}, {
.compatible = "renesas,xhci-r8a7791",
.data = &xhci_plat_renesas_rcar_gen2,
}, {
.compatible = "renesas,xhci-r8a7793",
.data = &xhci_plat_renesas_rcar_gen2,
}, {
.compatible = "renesas,xhci-r8a7795",
.data = &xhci_plat_renesas_rcar_gen3,
}, {
.compatible = "renesas,rcar-gen2-xhci",
.data = &xhci_plat_renesas_rcar_gen2,
}, {
.compatible = "renesas,rcar-gen3-xhci",
.data = &xhci_plat_renesas_rcar_gen3,
},
{},
};
MODULE_DEVICE_TABLE(of, usb_xhci_of_match);
#endif
static ssize_t config_imod_store(struct device *pdev,
struct device_attribute *attr, const char *buff, size_t size)
{
struct usb_hcd *hcd = dev_get_drvdata(pdev);
struct xhci_hcd *xhci;
u32 temp;
u32 imod;
unsigned long flags;
if (kstrtouint(buff, 10, &imod) != 1)
return 0;
imod &= ER_IRQ_INTERVAL_MASK;
xhci = hcd_to_xhci(hcd);
if (xhci->shared_hcd->state == HC_STATE_SUSPENDED
&& hcd->state == HC_STATE_SUSPENDED)
return -EACCES;
spin_lock_irqsave(&xhci->lock, flags);
temp = readl_relaxed(&xhci->ir_set->irq_control);
temp &= ~ER_IRQ_INTERVAL_MASK;
temp |= imod;
writel_relaxed(temp, &xhci->ir_set->irq_control);
spin_unlock_irqrestore(&xhci->lock, flags);
return size;
}
static ssize_t config_imod_show(struct device *pdev,
struct device_attribute *attr, char *buff)
{
struct usb_hcd *hcd = dev_get_drvdata(pdev);
struct xhci_hcd *xhci;
u32 temp;
unsigned long flags;
xhci = hcd_to_xhci(hcd);
if (xhci->shared_hcd->state == HC_STATE_SUSPENDED
&& hcd->state == HC_STATE_SUSPENDED)
return -EACCES;
spin_lock_irqsave(&xhci->lock, flags);
temp = readl_relaxed(&xhci->ir_set->irq_control) &
ER_IRQ_INTERVAL_MASK;
spin_unlock_irqrestore(&xhci->lock, flags);
return snprintf(buff, PAGE_SIZE, "%08u\n", temp);
}
static DEVICE_ATTR(config_imod, 0644, config_imod_show, config_imod_store);
static int xhci_plat_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
const struct hc_driver *driver;
struct device *sysdev;
struct xhci_hcd *xhci;
struct resource *res;
struct usb_hcd *hcd;
struct clk *clk;
int ret;
int irq;
u32 temp, imod;
unsigned long flags;
if (usb_disabled())
return -ENODEV;
driver = &xhci_plat_hc_driver;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
/*
* sysdev must point to a device that is known to the system firmware
* or PCI hardware. We handle these three cases here:
* 1. xhci_plat comes from firmware
* 2. xhci_plat is child of a device from firmware (dwc3-plat)
* 3. xhci_plat is grandchild of a pci device (dwc3-pci)
*/
sysdev = &pdev->dev;
if (sysdev->parent && !sysdev->of_node && sysdev->parent->of_node)
sysdev = sysdev->parent;
#ifdef CONFIG_PCI
else if (sysdev->parent && sysdev->parent->parent &&
sysdev->parent->parent->bus == &pci_bus_type)
sysdev = sysdev->parent->parent;
#endif
/* Try to set 64-bit DMA first */
if (WARN_ON(!sysdev->dma_mask))
/* Platform did not initialize dma_mask */
ret = dma_coerce_mask_and_coherent(sysdev,
DMA_BIT_MASK(64));
else
ret = dma_set_mask_and_coherent(sysdev, DMA_BIT_MASK(64));
/* If seting 64-bit DMA mask fails, fall back to 32-bit DMA mask */
if (ret) {
ret = dma_set_mask_and_coherent(sysdev, DMA_BIT_MASK(32));
if (ret)
return ret;
}
hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
dev_name(&pdev->dev), NULL);
if (!hcd)
return -ENOMEM;
hcd_to_bus(hcd)->skip_resume = true;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hcd->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(hcd->regs)) {
ret = PTR_ERR(hcd->regs);
goto put_hcd;
}
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
/*
* Not all platforms have a clk so it is not an error if the
* clock does not exists.
*/
clk = devm_clk_get(&pdev->dev, NULL);
if (!IS_ERR(clk)) {
ret = clk_prepare_enable(clk);
if (ret)
goto put_hcd;
} else if (PTR_ERR(clk) == -EPROBE_DEFER) {
ret = -EPROBE_DEFER;
goto put_hcd;
}
if (pdev->dev.parent)
pm_runtime_resume(pdev->dev.parent);
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
xhci = hcd_to_xhci(hcd);
match = of_match_node(usb_xhci_of_match, pdev->dev.of_node);
if (match) {
const struct xhci_plat_priv *priv_match = match->data;
struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
/* Just copy data for now */
if (priv_match)
*priv = *priv_match;
}
device_wakeup_enable(hcd->self.controller);
xhci->clk = clk;
xhci->main_hcd = hcd;
xhci->shared_hcd = __usb_create_hcd(driver, sysdev, &pdev->dev,
dev_name(&pdev->dev), hcd);
if (!xhci->shared_hcd) {
ret = -ENOMEM;
goto disable_clk;
}
hcd_to_bus(xhci->shared_hcd)->skip_resume = true;
if (device_property_read_bool(sysdev, "usb3-lpm-capable"))
xhci->quirks |= XHCI_LPM_SUPPORT;
if (device_property_read_bool(&pdev->dev, "quirk-broken-port-ped"))
xhci->quirks |= XHCI_BROKEN_PORT_PED;
if (device_property_read_u32(sysdev, "snps,xhci-imod-value", &imod))
imod = 0;
hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, "usb-phy", 0);
if (IS_ERR(hcd->usb_phy)) {
ret = PTR_ERR(hcd->usb_phy);
if (ret == -EPROBE_DEFER)
goto put_usb3_hcd;
hcd->usb_phy = NULL;
} else {
ret = usb_phy_init(hcd->usb_phy);
if (ret)
goto put_usb3_hcd;
}
ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (ret)
goto disable_usb_phy;
device_wakeup_enable(&hcd->self.root_hub->dev);
if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
xhci->shared_hcd->can_do_streams = 1;
ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
if (ret)
goto dealloc_usb2_hcd;
device_wakeup_enable(&xhci->shared_hcd->self.root_hub->dev);
/* override imod interval if specified */
if (imod) {
imod &= ER_IRQ_INTERVAL_MASK;
spin_lock_irqsave(&xhci->lock, flags);
temp = readl_relaxed(&xhci->ir_set->irq_control);
temp &= ~ER_IRQ_INTERVAL_MASK;
temp |= imod;
writel_relaxed(temp, &xhci->ir_set->irq_control);
spin_unlock_irqrestore(&xhci->lock, flags);
dev_dbg(&pdev->dev, "%s: imod set to %u\n", __func__, imod);
}
ret = device_create_file(&pdev->dev, &dev_attr_config_imod);
if (ret)
dev_err(&pdev->dev, "%s: unable to create imod sysfs entry\n",
__func__);
pm_runtime_mark_last_busy(&pdev->dev);
pm_runtime_put_autosuspend(&pdev->dev);
return 0;
dealloc_usb2_hcd:
usb_remove_hcd(hcd);
disable_usb_phy:
usb_phy_shutdown(hcd->usb_phy);
put_usb3_hcd:
usb_put_hcd(xhci->shared_hcd);
disable_clk:
if (!IS_ERR(clk))
clk_disable_unprepare(clk);
put_hcd:
usb_put_hcd(hcd);
return ret;
}
static int xhci_plat_remove(struct platform_device *dev)
{
struct usb_hcd *hcd = platform_get_drvdata(dev);
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
struct clk *clk = xhci->clk;
pm_runtime_disable(&dev->dev);
xhci->xhc_state |= XHCI_STATE_REMOVING;
device_remove_file(&dev->dev, &dev_attr_config_imod);
usb_remove_hcd(xhci->shared_hcd);
usb_phy_shutdown(hcd->usb_phy);
usb_remove_hcd(hcd);
usb_put_hcd(xhci->shared_hcd);
if (!IS_ERR(clk))
clk_disable_unprepare(clk);
usb_put_hcd(hcd);
return 0;
}
#ifdef CONFIG_PM
static int xhci_plat_runtime_idle(struct device *dev)
{
/*
* When pm_runtime_put_autosuspend() is called on this device,
* after this idle callback returns the PM core will schedule the
* autosuspend if there is any remaining time until expiry. However,
* when reaching this point because the child_count becomes 0, the
* core does not honor autosuspend in that case and results in
* idle/suspend happening immediately. In order to have a delay
* before suspend we have to call pm_runtime_autosuspend() manually.
*/
pm_runtime_mark_last_busy(dev);
pm_runtime_autosuspend(dev);
return -EBUSY;
}
static int xhci_plat_runtime_suspend(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
if (!xhci)
return 0;
dev_dbg(dev, "xhci-plat runtime suspend\n");
return xhci_suspend(xhci, true);
}
static int xhci_plat_runtime_resume(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
int ret;
if (!xhci)
return 0;
dev_dbg(dev, "xhci-plat runtime resume\n");
ret = xhci_resume(xhci, false);
pm_runtime_mark_last_busy(dev);
return ret;
}
static const struct dev_pm_ops xhci_plat_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(NULL, NULL)
SET_RUNTIME_PM_OPS(xhci_plat_runtime_suspend, xhci_plat_runtime_resume,
xhci_plat_runtime_idle)
};
#define DEV_PM_OPS (&xhci_plat_pm_ops)
#else
#define DEV_PM_OPS NULL
#endif /* CONFIG_PM */
static const struct acpi_device_id usb_xhci_acpi_match[] = {
/* XHCI-compliant USB Controller */
{ "PNP0D10", },
{ }
};
MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);
static struct platform_driver usb_xhci_driver = {
.probe = xhci_plat_probe,
.remove = xhci_plat_remove,
.driver = {
.name = "xhci-hcd",
.pm = DEV_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_xhci_driver);
}
module_init(xhci_plat_init);
static void __exit xhci_plat_exit(void)
{
platform_driver_unregister(&usb_xhci_driver);
}
module_exit(xhci_plat_exit);
MODULE_DESCRIPTION("xHCI Platform Host Controller Driver");
MODULE_LICENSE("GPL");