1 #include <linux/module.h> 2 #include <linux/platform_device.h> 3 #include <linux/dma-mapping.h> 4 #include <linux/usb/otg.h> 5 #include <linux/usb/usb_phy_gen_xceiv.h> 6 #include <linux/slab.h> 7 #include <linux/clk.h> 8 #include <linux/regulator/consumer.h> 9 #include <linux/of.h> 10 #include <linux/of_address.h> 11 12 #include "am35x-phy-control.h" 13 #include "phy-generic.h" 14 15 struct am335x_phy { 16 struct usb_phy_gen_xceiv usb_phy_gen; 17 struct phy_control *phy_ctrl; 18 int id; 19 }; 20 21 static int am335x_init(struct usb_phy *phy) 22 { 23 struct am335x_phy *am_phy = dev_get_drvdata(phy->dev); 24 25 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, true); 26 return 0; 27 } 28 29 static void am335x_shutdown(struct usb_phy *phy) 30 { 31 struct am335x_phy *am_phy = dev_get_drvdata(phy->dev); 32 33 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, false); 34 } 35 36 static int am335x_phy_probe(struct platform_device *pdev) 37 { 38 struct am335x_phy *am_phy; 39 struct device *dev = &pdev->dev; 40 int ret; 41 42 am_phy = devm_kzalloc(dev, sizeof(*am_phy), GFP_KERNEL); 43 if (!am_phy) 44 return -ENOMEM; 45 46 am_phy->phy_ctrl = am335x_get_phy_control(dev); 47 if (!am_phy->phy_ctrl) 48 return -EPROBE_DEFER; 49 am_phy->id = of_alias_get_id(pdev->dev.of_node, "phy"); 50 if (am_phy->id < 0) { 51 dev_err(&pdev->dev, "Missing PHY id: %d\n", am_phy->id); 52 return am_phy->id; 53 } 54 55 ret = usb_phy_gen_create_phy(dev, &am_phy->usb_phy_gen, NULL); 56 if (ret) 57 return ret; 58 59 ret = usb_add_phy_dev(&am_phy->usb_phy_gen.phy); 60 if (ret) 61 return ret; 62 am_phy->usb_phy_gen.phy.init = am335x_init; 63 am_phy->usb_phy_gen.phy.shutdown = am335x_shutdown; 64 65 platform_set_drvdata(pdev, am_phy); 66 67 return 0; 68 } 69 70 static int am335x_phy_remove(struct platform_device *pdev) 71 { 72 struct am335x_phy *am_phy = platform_get_drvdata(pdev); 73 74 usb_remove_phy(&am_phy->usb_phy_gen.phy); 75 return 0; 76 } 77 78 #ifdef CONFIG_PM_RUNTIME 79 80 static int am335x_phy_runtime_suspend(struct device *dev) 81 { 82 struct platform_device *pdev = to_platform_device(dev); 83 struct am335x_phy *am_phy = platform_get_drvdata(pdev); 84 85 if (device_may_wakeup(dev)) 86 phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, true); 87 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, false); 88 return 0; 89 } 90 91 static int am335x_phy_runtime_resume(struct device *dev) 92 { 93 struct platform_device *pdev = to_platform_device(dev); 94 struct am335x_phy *am_phy = platform_get_drvdata(pdev); 95 96 phy_ctrl_power(am_phy->phy_ctrl, am_phy->id, true); 97 if (device_may_wakeup(dev)) 98 phy_ctrl_wkup(am_phy->phy_ctrl, am_phy->id, false); 99 return 0; 100 } 101 102 static const struct dev_pm_ops am335x_pm_ops = { 103 SET_RUNTIME_PM_OPS(am335x_phy_runtime_suspend, 104 am335x_phy_runtime_resume, NULL) 105 }; 106 107 #define DEV_PM_OPS (&am335x_pm_ops) 108 #else 109 #define DEV_PM_OPS NULL 110 #endif 111 112 static const struct of_device_id am335x_phy_ids[] = { 113 { .compatible = "ti,am335x-usb-phy" }, 114 { } 115 }; 116 MODULE_DEVICE_TABLE(of, am335x_phy_ids); 117 118 static struct platform_driver am335x_phy_driver = { 119 .probe = am335x_phy_probe, 120 .remove = am335x_phy_remove, 121 .driver = { 122 .name = "am335x-phy-driver", 123 .owner = THIS_MODULE, 124 .pm = DEV_PM_OPS, 125 .of_match_table = am335x_phy_ids, 126 }, 127 }; 128 129 module_platform_driver(am335x_phy_driver); 130 MODULE_LICENSE("GPL v2"); 131