123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143 |
- #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/regulator/consumer.h>
- #include <linux/of.h>
- #include <linux/of_address.h>
- #include "am35x-phy-control.h"
- #include "phy-generic.h"
- struct am335x_phy {
- struct usb_phy_generic usb_phy_gen;
- struct phy_control *phy_ctrl;
- int id;
- };
- 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, 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, 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;
- }
- 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, 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 platform_device *pdev = to_platform_device(dev);
- struct am335x_phy *am_phy = platform_get_drvdata(pdev);
- /*
- * 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, false);
- return 0;
- }
- static int am335x_phy_resume(struct device *dev)
- {
- struct platform_device *pdev = to_platform_device(dev);
- struct am335x_phy *am_phy = platform_get_drvdata(pdev);
- phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, 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");
|