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  1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Greybus Bridged-Phy Bus driver
  4 *
  5 * Copyright 2016 Google Inc.
  6 */
  7
  8#ifndef __GBPHY_H
  9#define __GBPHY_H
 10
 11struct gbphy_device {
 12	u32 id;
 13	struct greybus_descriptor_cport *cport_desc;
 14	struct gb_bundle *bundle;
 15	struct list_head list;
 16	struct device dev;
 17};
 18#define to_gbphy_dev(d) container_of(d, struct gbphy_device, dev)
 19
 20static inline void *gb_gbphy_get_data(struct gbphy_device *gdev)
 21{
 22	return dev_get_drvdata(&gdev->dev);
 23}
 24
 25static inline void gb_gbphy_set_data(struct gbphy_device *gdev, void *data)
 26{
 27	dev_set_drvdata(&gdev->dev, data);
 28}
 29
 30struct gbphy_device_id {
 31	__u8 protocol_id;
 32};
 33
 34#define GBPHY_PROTOCOL(p)		\
 35	.protocol_id	= (p),
 36
 37struct gbphy_driver {
 38	const char *name;
 39	int (*probe)(struct gbphy_device *device,
 40		     const struct gbphy_device_id *id);
 41	void (*remove)(struct gbphy_device *device);
 42	const struct gbphy_device_id *id_table;
 43
 44	struct device_driver driver;
 45};
 46#define to_gbphy_driver(d) container_of(d, struct gbphy_driver, driver)
 47
 48int gb_gbphy_register_driver(struct gbphy_driver *driver,
 49			     struct module *owner, const char *mod_name);
 50void gb_gbphy_deregister_driver(struct gbphy_driver *driver);
 51
 52#define gb_gbphy_register(driver) \
 53	gb_gbphy_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
 54#define gb_gbphy_deregister(driver) \
 55	gb_gbphy_deregister_driver(driver)
 56
 57/**
 58 * module_gbphy_driver() - Helper macro for registering a gbphy driver
 59 * @__gbphy_driver: gbphy_driver structure
 60 *
 61 * Helper macro for gbphy drivers to set up proper module init / exit
 62 * functions.  Replaces module_init() and module_exit() and keeps people from
 63 * printing pointless things to the kernel log when their driver is loaded.
 64 */
 65#define module_gbphy_driver(__gbphy_driver)	\
 66	module_driver(__gbphy_driver, gb_gbphy_register, gb_gbphy_deregister)
 67
 68#ifdef CONFIG_PM
 69static inline int gbphy_runtime_get_sync(struct gbphy_device *gbphy_dev)
 70{
 71	struct device *dev = &gbphy_dev->dev;
 72	int ret;
 73
 74	ret = pm_runtime_get_sync(dev);
 75	if (ret < 0) {
 76		dev_err(dev, "pm_runtime_get_sync failed: %d\n", ret);
 77		pm_runtime_put_noidle(dev);
 78		return ret;
 79	}
 80
 81	return 0;
 82}
 83
 84static inline void gbphy_runtime_put_autosuspend(struct gbphy_device *gbphy_dev)
 85{
 86	struct device *dev = &gbphy_dev->dev;
 87
 88	pm_runtime_mark_last_busy(dev);
 89	pm_runtime_put_autosuspend(dev);
 90}
 91
 92static inline void gbphy_runtime_get_noresume(struct gbphy_device *gbphy_dev)
 93{
 94	pm_runtime_get_noresume(&gbphy_dev->dev);
 95}
 96
 97static inline void gbphy_runtime_put_noidle(struct gbphy_device *gbphy_dev)
 98{
 99	pm_runtime_put_noidle(&gbphy_dev->dev);
100}
101#else
102static inline int gbphy_runtime_get_sync(struct gbphy_device *gbphy_dev) { return 0; }
103static inline void gbphy_runtime_put_autosuspend(struct gbphy_device *gbphy_dev) {}
104static inline void gbphy_runtime_get_noresume(struct gbphy_device *gbphy_dev) {}
105static inline void gbphy_runtime_put_noidle(struct gbphy_device *gbphy_dev) {}
106#endif
107
108#endif /* __GBPHY_H */
109