mirror of https://gitee.com/openkylin/linux.git
147 lines
3.7 KiB
C
147 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/usb/otg.h>
|
|
#include <linux/usb/usb_phy_generic.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/usb/of.h>
|
|
|
|
#include "phy-am335x-control.h"
|
|
#include "phy-generic.h"
|
|
|
|
struct am335x_phy {
|
|
struct usb_phy_generic usb_phy_gen;
|
|
struct phy_control *phy_ctrl;
|
|
int id;
|
|
enum usb_dr_mode dr_mode;
|
|
};
|
|
|
|
static int am335x_init(struct usb_phy *phy)
|
|
{
|
|
struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);
|
|
|
|
phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, true);
|
|
return 0;
|
|
}
|
|
|
|
static void am335x_shutdown(struct usb_phy *phy)
|
|
{
|
|
struct am335x_phy *am_phy = dev_get_drvdata(phy->dev);
|
|
|
|
phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, false);
|
|
}
|
|
|
|
static int am335x_phy_probe(struct platform_device *pdev)
|
|
{
|
|
struct am335x_phy *am_phy;
|
|
struct device *dev = &pdev->dev;
|
|
int ret;
|
|
|
|
am_phy = devm_kzalloc(dev, sizeof(*am_phy), GFP_KERNEL);
|
|
if (!am_phy)
|
|
return -ENOMEM;
|
|
|
|
am_phy->phy_ctrl = am335x_get_phy_control(dev);
|
|
if (!am_phy->phy_ctrl)
|
|
return -EPROBE_DEFER;
|
|
|
|
am_phy->id = of_alias_get_id(pdev->dev.of_node, "phy");
|
|
if (am_phy->id < 0) {
|
|
dev_err(&pdev->dev, "Missing PHY id: %d\n", am_phy->id);
|
|
return am_phy->id;
|
|
}
|
|
|
|
am_phy->dr_mode = of_usb_get_dr_mode_by_phy(pdev->dev.of_node, -1);
|
|
|
|
ret = usb_phy_gen_create_phy(dev, &am_phy->usb_phy_gen, NULL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
am_phy->usb_phy_gen.phy.init = am335x_init;
|
|
am_phy->usb_phy_gen.phy.shutdown = am335x_shutdown;
|
|
|
|
platform_set_drvdata(pdev, am_phy);
|
|
device_init_wakeup(dev, true);
|
|
|
|
/*
|
|
* If we leave PHY wakeup enabled then AM33XX wakes up
|
|
* immediately from DS0. To avoid this we mark dev->power.can_wakeup
|
|
* to false. The same is checked in suspend routine to decide
|
|
* on whether to enable PHY wakeup or not.
|
|
* PHY wakeup works fine in standby mode, there by allowing us to
|
|
* handle remote wakeup, wakeup on disconnect and connect.
|
|
*/
|
|
|
|
device_set_wakeup_enable(dev, false);
|
|
phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, false);
|
|
|
|
return usb_add_phy_dev(&am_phy->usb_phy_gen.phy);
|
|
}
|
|
|
|
static int am335x_phy_remove(struct platform_device *pdev)
|
|
{
|
|
struct am335x_phy *am_phy = platform_get_drvdata(pdev);
|
|
|
|
usb_remove_phy(&am_phy->usb_phy_gen.phy);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int am335x_phy_suspend(struct device *dev)
|
|
{
|
|
struct am335x_phy *am_phy = dev_get_drvdata(dev);
|
|
|
|
/*
|
|
* Enable phy wakeup only if dev->power.can_wakeup is true.
|
|
* Make sure to enable wakeup to support remote wakeup in
|
|
* standby mode ( same is not supported in OFF(DS0) mode).
|
|
* Enable it by doing
|
|
* echo enabled > /sys/bus/platform/devices/<usb-phy-id>/power/wakeup
|
|
*/
|
|
|
|
if (device_may_wakeup(dev))
|
|
phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, true);
|
|
|
|
phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, false);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int am335x_phy_resume(struct device *dev)
|
|
{
|
|
struct am335x_phy *am_phy = dev_get_drvdata(dev);
|
|
|
|
phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, am_phy->dr_mode, true);
|
|
|
|
if (device_may_wakeup(dev))
|
|
phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, false);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(am335x_pm_ops, am335x_phy_suspend, am335x_phy_resume);
|
|
|
|
static const struct of_device_id am335x_phy_ids[] = {
|
|
{ .compatible = "ti,am335x-usb-phy" },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, am335x_phy_ids);
|
|
|
|
static struct platform_driver am335x_phy_driver = {
|
|
.probe = am335x_phy_probe,
|
|
.remove = am335x_phy_remove,
|
|
.driver = {
|
|
.name = "am335x-phy-driver",
|
|
.pm = &am335x_pm_ops,
|
|
.of_match_table = am335x_phy_ids,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(am335x_phy_driver);
|
|
MODULE_LICENSE("GPL v2");
|