// SPDX-License-Identifier: GPL-2.0
/*
* Cadence USBSS DRD Driver.
*
* Copyright (C) 2018-2020 Cadence.
* Copyright (C) 2017-2018 NXP
* Copyright (C) 2019 Texas Instruments
*
*
* Author: Peter Chen <[email protected]>
* Pawel Laszczak <[email protected]>
* Roger Quadros <[email protected]>
*/
#include <linux/module.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include "core.h"
#include "gadget-export.h"
#include "drd.h"
static int set_phy_power_on(struct cdns *cdns)
{
int ret;
ret = phy_power_on(cdns->usb2_phy);
if (ret)
return ret;
ret = phy_power_on(cdns->usb3_phy);
if (ret)
phy_power_off(cdns->usb2_phy);
return ret;
}
static void set_phy_power_off(struct cdns *cdns)
{
phy_power_off(cdns->usb3_phy);
phy_power_off(cdns->usb2_phy);
}
/**
* cdns3_plat_probe - probe for cdns3 core device
* @pdev: Pointer to cdns3 core platform device
*
* Returns 0 on success otherwise negative errno
*/
static int cdns3_plat_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *res;
struct cdns *cdns;
void __iomem *regs;
int ret;
cdns = devm_kzalloc(dev, sizeof(*cdns), GFP_KERNEL);
if (!cdns)
return -ENOMEM;
cdns->dev = dev;
cdns->pdata = dev_get_platdata(dev);
platform_set_drvdata(pdev, cdns);
ret = platform_get_irq_byname(pdev, "host");
if (ret < 0)
return ret;
cdns->xhci_res[0].start = ret;
cdns->xhci_res[0].end = ret;
cdns->xhci_res[0].flags = IORESOURCE_IRQ | irq_get_trigger_type(ret);
cdns->xhci_res[0].name = "host";
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "xhci");
if (!res) {
dev_err(dev, "couldn't get xhci resource\n");
return -ENXIO;
}
cdns->xhci_res[1] = *res;
cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral");
if (cdns->dev_irq < 0)
return dev_err_probe(dev, cdns->dev_irq,
"Failed to get peripheral IRQ\n");
regs = devm_platform_ioremap_resource_byname(pdev, "dev");
if (IS_ERR(regs))
return dev_err_probe(dev, PTR_ERR(regs),
"Failed to get dev base\n");
cdns->dev_regs = regs;
cdns->otg_irq = platform_get_irq_byname(pdev, "otg");
if (cdns->otg_irq < 0)
return dev_err_probe(dev, cdns->otg_irq,
"Failed to get otg IRQ\n");
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "otg");
if (!res) {
dev_err(dev, "couldn't get otg resource\n");
return -ENXIO;
}
cdns->phyrst_a_enable = device_property_read_bool(dev, "cdns,phyrst-a-enable");
cdns->otg_res = *res;
cdns->wakeup_irq = platform_get_irq_byname_optional(pdev, "wakeup");
if (cdns->wakeup_irq == -EPROBE_DEFER)
return cdns->wakeup_irq;
if (cdns->wakeup_irq < 0) {
dev_dbg(dev, "couldn't get wakeup irq\n");
cdns->wakeup_irq = 0x0;
}
cdns->usb2_phy = devm_phy_optional_get(dev, "cdns3,usb2-phy");
if (IS_ERR(cdns->usb2_phy))
return dev_err_probe(dev, PTR_ERR(cdns->usb2_phy),
"Failed to get cdn3,usb2-phy\n");
ret = phy_init(cdns->usb2_phy);
if (ret)
return ret;
cdns->usb3_phy = devm_phy_optional_get(dev, "cdns3,usb3-phy");
if (IS_ERR(cdns->usb3_phy))
return dev_err_probe(dev, PTR_ERR(cdns->usb3_phy),
"Failed to get cdn3,usb3-phy\n");
ret = phy_init(cdns->usb3_phy);
if (ret)
goto err_phy3_init;
ret = set_phy_power_on(cdns);
if (ret)
goto err_phy_power_on;
cdns->gadget_init = cdns3_gadget_init;
ret = cdns_init(cdns);
if (ret)
goto err_cdns_init;
device_set_wakeup_capable(dev, true);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
if (!(cdns->pdata && (cdns->pdata->quirks & CDNS3_DEFAULT_PM_RUNTIME_ALLOW)))
pm_runtime_forbid(dev);
/*
* The controller needs less time between bus and controller suspend,
* and we also needs a small delay to avoid frequently entering low
* power mode.
*/
pm_runtime_set_autosuspend_delay(dev, 20);
pm_runtime_mark_last_busy(dev);
pm_runtime_use_autosuspend(dev);
return 0;
err_cdns_init:
set_phy_power_off(cdns);
err_phy_power_on:
phy_exit(cdns->usb3_phy);
err_phy3_init:
phy_exit(cdns->usb2_phy);
return ret;
}
/**
* cdns3_plat_remove() - unbind drd driver and clean up
* @pdev: Pointer to Linux platform device
*
* Returns 0 on success otherwise negative errno
*/
static void cdns3_plat_remove(struct platform_device *pdev)
{
struct cdns *cdns = platform_get_drvdata(pdev);
struct device *dev = cdns->dev;
pm_runtime_get_sync(dev);
pm_runtime_disable(dev);
pm_runtime_put_noidle(dev);
cdns_remove(cdns);
set_phy_power_off(cdns);
phy_exit(cdns->usb2_phy);
phy_exit(cdns->usb3_phy);
}
#ifdef CONFIG_PM
static int cdns3_set_platform_suspend(struct device *dev,
bool suspend, bool wakeup)
{
struct cdns *cdns = dev_get_drvdata(dev);
int ret = 0;
if (cdns->pdata && cdns->pdata->platform_suspend)
ret = cdns->pdata->platform_suspend(dev, suspend, wakeup);
return ret;
}
static int cdns3_controller_suspend(struct device *dev, pm_message_t msg)
{
struct cdns *cdns = dev_get_drvdata(dev);
bool wakeup;
unsigned long flags;
if (cdns->in_lpm)
return 0;
if (PMSG_IS_AUTO(msg))
wakeup = true;
else
wakeup = device_may_wakeup(dev);
cdns3_set_platform_suspend(cdns->dev, true, wakeup);
set_phy_power_off(cdns);
spin_lock_irqsave(&cdns->lock, flags);
cdns->in_lpm = true;
spin_unlock_irqrestore(&cdns->lock, flags);
dev_dbg(cdns->dev, "%s ends\n", __func__);
return 0;
}
static int cdns3_controller_resume(struct device *dev, pm_message_t msg)
{
struct cdns *cdns = dev_get_drvdata(dev);
int ret;
unsigned long flags;
if (!cdns->in_lpm)
return 0;
if (cdns_power_is_lost(cdns)) {
phy_exit(cdns->usb2_phy);
ret = phy_init(cdns->usb2_phy);
if (ret)
return ret;
phy_exit(cdns->usb3_phy);
ret = phy_init(cdns->usb3_phy);
if (ret)
return ret;
}
ret = set_phy_power_on(cdns);
if (ret)
return ret;
cdns3_set_platform_suspend(cdns->dev, false, false);
spin_lock_irqsave(&cdns->lock, flags);
cdns_resume(cdns);
cdns->in_lpm = false;
spin_unlock_irqrestore(&cdns->lock, flags);
cdns_set_active(cdns, !PMSG_IS_AUTO(msg));
if (cdns->wakeup_pending) {
cdns->wakeup_pending = false;
enable_irq(cdns->wakeup_irq);
}
dev_dbg(cdns->dev, "%s ends\n", __func__);
return ret;
}
static int cdns3_plat_runtime_suspend(struct device *dev)
{
return cdns3_controller_suspend(dev, PMSG_AUTO_SUSPEND);
}
static int cdns3_plat_runtime_resume(struct device *dev)
{
return cdns3_controller_resume(dev, PMSG_AUTO_RESUME);
}
#ifdef CONFIG_PM_SLEEP
static int cdns3_plat_suspend(struct device *dev)
{
struct cdns *cdns = dev_get_drvdata(dev);
int ret;
cdns_suspend(cdns);
ret = cdns3_controller_suspend(dev, PMSG_SUSPEND);
if (ret)
return ret;
if (device_may_wakeup(dev) && cdns->wakeup_irq)
enable_irq_wake(cdns->wakeup_irq);
return ret;
}
static int cdns3_plat_resume(struct device *dev)
{
return cdns3_controller_resume(dev, PMSG_RESUME);
}
#endif /* CONFIG_PM_SLEEP */
#endif /* CONFIG_PM */
static const struct dev_pm_ops cdns3_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(cdns3_plat_suspend, cdns3_plat_resume)
SET_RUNTIME_PM_OPS(cdns3_plat_runtime_suspend,
cdns3_plat_runtime_resume, NULL)
};
#ifdef CONFIG_OF
static const struct of_device_id of_cdns3_match[] = {
{ .compatible = "cdns,usb3" },
{ },
};
MODULE_DEVICE_TABLE(of, of_cdns3_match);
#endif
static struct platform_driver cdns3_driver = {
.probe = cdns3_plat_probe,
.remove_new = cdns3_plat_remove,
.driver = {
.name = "cdns-usb3",
.of_match_table = of_match_ptr(of_cdns3_match),
.pm = &cdns3_pm_ops,
},
};
module_platform_driver(cdns3_driver);
MODULE_ALIAS("platform:cdns3");
MODULE_AUTHOR("Pawel Laszczak <[email protected]>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Cadence USB3 DRD Controller Driver");
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