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
8 struct device;
9
10 enum 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
18 enum {
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
26 enum {
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
35 enum {
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
43 enum {
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
50 enum 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
58 struct dual_role_phy_instance;
59
60 /* Description of typec port */
61 struct 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
82 struct 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)
93 extern void dual_role_instance_changed(struct dual_role_phy_instance
94 *dual_role);
95 extern struct dual_role_phy_instance *__must_check
96 devm_dual_role_instance_register(struct device *parent,
97 const struct dual_role_phy_desc *desc);
98 extern void devm_dual_role_instance_unregister(struct device *dev,
99 struct dual_role_phy_instance
100 *dual_role);
101 extern int dual_role_get_property(struct dual_role_phy_instance *dual_role,
102 enum dual_role_property prop,
103 unsigned int *val);
104 extern int dual_role_set_property(struct dual_role_phy_instance *dual_role,
105 enum dual_role_property prop,
106 const unsigned int *val);
107 extern int dual_role_property_is_writeable(struct dual_role_phy_instance
108 *dual_role,
109 enum dual_role_property prop);
110 extern void *dual_role_get_drvdata(struct dual_role_phy_instance *dual_role);
111 #else /* CONFIG_DUAL_ROLE_USB_INTF */
dual_role_instance_changed(struct dual_role_phy_instance * dual_role)112 static inline void dual_role_instance_changed(struct dual_role_phy_instance
113 *dual_role){}
114 static inline struct dual_role_phy_instance *__must_check
devm_dual_role_instance_register(struct device * parent,const struct dual_role_phy_desc * desc)115 devm_dual_role_instance_register(struct device *parent,
116 const struct dual_role_phy_desc *desc)
117 {
118 return ERR_PTR(-ENOSYS);
119 }
devm_dual_role_instance_unregister(struct device * dev,struct dual_role_phy_instance * dual_role)120 static inline void devm_dual_role_instance_unregister(struct device *dev,
121 struct dual_role_phy_instance
122 *dual_role){}
dual_role_get_drvdata(struct dual_role_phy_instance * dual_role)123 static inline void *dual_role_get_drvdata(struct dual_role_phy_instance
124 *dual_role)
125 {
126 return ERR_PTR(-ENOSYS);
127 }
128 #endif /* CONFIG_DUAL_ROLE_USB_INTF */
129 #endif /* __LINUX_CLASS_DUAL_ROLE_H__ */
130