1#ifndef __LINUX_CLASS_DUAL_ROLE_H__
2#define __LINUX_CLASS_DUAL_ROLE_H__
3
4#include <linux/workqueue.h>
5#include <linux/errno.h>
6#include <linux/types.h>
7
8struct device;
9
10enum dual_role_supported_modes {
11	DUAL_ROLE_SUPPORTED_MODES_DFP_AND_UFP = 0,
12	DUAL_ROLE_SUPPORTED_MODES_DFP,
13	DUAL_ROLE_SUPPORTED_MODES_UFP,
14/*The following should be the last element*/
15	DUAL_ROLE_PROP_SUPPORTED_MODES_TOTAL,
16};
17
18enum {
19	DUAL_ROLE_PROP_MODE_UFP = 0,
20	DUAL_ROLE_PROP_MODE_DFP,
21	DUAL_ROLE_PROP_MODE_NONE,
22/*The following should be the last element*/
23	DUAL_ROLE_PROP_MODE_TOTAL,
24};
25
26enum {
27	DUAL_ROLE_PROP_PR_SRC = 0,
28	DUAL_ROLE_PROP_PR_SNK,
29	DUAL_ROLE_PROP_PR_NONE,
30/*The following should be the last element*/
31	DUAL_ROLE_PROP_PR_TOTAL,
32
33};
34
35enum {
36	DUAL_ROLE_PROP_DR_HOST = 0,
37	DUAL_ROLE_PROP_DR_DEVICE,
38	DUAL_ROLE_PROP_DR_NONE,
39/*The following should be the last element*/
40	DUAL_ROLE_PROP_DR_TOTAL,
41};
42
43enum {
44	DUAL_ROLE_PROP_VCONN_SUPPLY_NO = 0,
45	DUAL_ROLE_PROP_VCONN_SUPPLY_YES,
46/*The following should be the last element*/
47	DUAL_ROLE_PROP_VCONN_SUPPLY_TOTAL,
48};
49
50enum dual_role_property {
51	DUAL_ROLE_PROP_SUPPORTED_MODES = 0,
52	DUAL_ROLE_PROP_MODE,
53	DUAL_ROLE_PROP_PR,
54	DUAL_ROLE_PROP_DR,
55	DUAL_ROLE_PROP_VCONN_SUPPLY,
56};
57
58struct dual_role_phy_instance;
59
60/* Description of typec port */
61struct dual_role_phy_desc {
62	/* /sys/class/dual_role_usb/<name>/ */
63	const char *name;
64	enum dual_role_supported_modes supported_modes;
65	enum dual_role_property *properties;
66	size_t num_properties;
67
68	/* Callback for "cat /sys/class/dual_role_usb/<name>/<property>" */
69	int (*get_property)(struct dual_role_phy_instance *dual_role,
70			     enum dual_role_property prop,
71			     unsigned int *val);
72	/* Callback for "echo <value> >
73	 *                      /sys/class/dual_role_usb/<name>/<property>" */
74	int (*set_property)(struct dual_role_phy_instance *dual_role,
75			     enum dual_role_property prop,
76			     const unsigned int *val);
77	/* Decides whether userspace can change a specific property */
78	int (*property_is_writeable)(struct dual_role_phy_instance *dual_role,
79				      enum dual_role_property prop);
80};
81
82struct dual_role_phy_instance {
83	const struct dual_role_phy_desc *desc;
84
85	/* Driver private data */
86	void *drv_data;
87
88	struct device dev;
89	struct work_struct changed_work;
90};
91
92#if IS_ENABLED(CONFIG_DUAL_ROLE_USB_INTF)
93extern void dual_role_instance_changed(struct dual_role_phy_instance
94				       *dual_role);
95extern struct dual_role_phy_instance *__must_check
96devm_dual_role_instance_register(struct device *parent,
97				 const struct dual_role_phy_desc *desc);
98extern void devm_dual_role_instance_unregister(struct device *dev,
99					       struct dual_role_phy_instance
100					       *dual_role);
101extern int dual_role_get_property(struct dual_role_phy_instance *dual_role,
102				  enum dual_role_property prop,
103				  unsigned int *val);
104extern int dual_role_set_property(struct dual_role_phy_instance *dual_role,
105				  enum dual_role_property prop,
106				  const unsigned int *val);
107extern int dual_role_property_is_writeable(struct dual_role_phy_instance
108					   *dual_role,
109					   enum dual_role_property prop);
110extern void *dual_role_get_drvdata(struct dual_role_phy_instance *dual_role);
111#else /* CONFIG_DUAL_ROLE_USB_INTF */
112static void dual_role_instance_changed(struct dual_role_phy_instance
113				       *dual_role){}
114static struct dual_role_phy_instance *__must_check
115devm_dual_role_instance_register(struct device *parent,
116				 const struct dual_role_phy_desc *desc)
117{
118	return ERR_PTR(-ENOSYS);
119}
120static void devm_dual_role_instance_unregister(struct device *dev,
121					       struct dual_role_phy_instance
122					       *dual_role){}
123static void *dual_role_get_drvdata(struct dual_role_phy_instance *dual_role)
124{
125	return ERR_PTR(-ENOSYS);
126}
127#endif /* CONFIG_DUAL_ROLE_USB_INTF */
128#endif /* __LINUX_CLASS_DUAL_ROLE_H__ */
129