337 lines
7.3 KiB
C
337 lines
7.3 KiB
C
|
// 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 <peter.chen@nxp.com>
|
||
|
|
* Pawel Laszczak <pawell@cadence.com>
|
||
|
|
* Roger Quadros <rogerq@ti.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/irq.h>
|
||
|
|
#include <linux/kernel.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 cdns->dev_irq;
|
||
|
|
|
||
|
|
regs = devm_platform_ioremap_resource_byname(pdev, "dev");
|
||
|
|
if (IS_ERR(regs))
|
||
|
|
return PTR_ERR(regs);
|
||
|
|
cdns->dev_regs = regs;
|
||
|
|
|
||
|
|
cdns->otg_irq = platform_get_irq_byname(pdev, "otg");
|
||
|
|
if (cdns->otg_irq < 0)
|
||
|
|
return cdns->otg_irq;
|
||
|
|
|
||
|
|
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 PTR_ERR(cdns->usb2_phy);
|
||
|
|
|
||
|
|
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 PTR_ERR(cdns->usb3_phy);
|
||
|
|
|
||
|
|
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 int 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);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#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, !PMSG_IS_AUTO(msg));
|
||
|
|
cdns->in_lpm = false;
|
||
|
|
spin_unlock_irqrestore(&cdns->lock, flags);
|
||
|
|
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 = 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 <pawell@cadence.com>");
|
||
|
|
MODULE_LICENSE("GPL v2");
|
||
|
|
MODULE_DESCRIPTION("Cadence USB3 DRD Controller Driver");
|